What are the cheapest airlines to fly from London Heathrow Airport to Southeast Asia one-way?

To fly one-way, consider booking your trip with Singapore Airlines, which is currently one of the cheapest options available, starting at $670. China Southern flights start at $672 while deals on Gulf Air start at $684 one-way. Find deals

What are the most popular routes from London Heathrow Airport to Southeast Asia?

The most popular route from London Heathrow Airport to Southeast Asia is London Heathrow - Bangkok Suvarnabhumi. You may also consider London Heathrow - Denpasar Bali Ngurah Rai or London Heathrow - Kuala Lumpur Intl.

What are the cheapest flights from London Heathrow Airport to Southeast Asia?

Looking at all options, your cheapest flight can be booked for $792. While the most popular route (London Heathrow - Bangkok Suvarnabhumi) can be booked for $1,639 on average our data indicates $5,011 when flying from London Heathrow Airport to Southeast Asia.

What are the most reliable airlines from London Heathrow Airport to Southeast Asia?

Consider Thai Airways (62%), EVA Air (59%) or Air Canada (57%) when booking your flight. These represent the most reliable airlines when flying from London Heathrow Airport to Southeast Asia.

How far in advance should I book a flight from London Heathrow Airport to Southeast Asia?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 57 days in advance, which can save you up to 51% on flights from London Heathrow Airport to Southeast Asia compared to booking the week you need them. Waiting 57 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $1,198. For sooner than that we have options available in the next 3 days from $1,445.

What is the cheapest month to fly from London Heathrow Airport to Southeast Asia?

May can be a great time to fly to Southeast Asia from London Heathrow Airport with a flight ticket averaging about $1,329. Cheapflights users have found deals in the month of May for as cheap as $584. The most expensive prices can be found in the month of December.

Can I find deals for flights from Heathrow to Southeast Asia that include hotel bookings?

Yes. In addition to deals on Heathrow to Southeast Asia flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Heathrow to Southeast Asia?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Southeast Asia.

Can I find deals for business class flights from Heathrow to Southeast Asia?

Yes. Cheapflights offers flight deals from Heathrow to Southeast Asia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$659+ Flights from London Heathrow Airport to Southeast Asia

Cheap flight deals from Heathrow to Southeast Asia

Round-trip from	$927
One-way from	$659
Popular in	December
Cheapest in	May
Average price	$1,178

Shenzhen Airlines
29/11-14/12
2 total stops
44h 45m total
London to Southeast Asia

Search Deals

28/9
3 total stops
27h 40m total
London to Southeast Asia

Search Deals

Highest demand for flights based on searches. 8% potential increase in price ($186 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($71 potential savings vs. average return price).

Search Deals

Average for round-trip flights in June 2025

Search Deals

Find flight deals from Heathrow to Southeast Asia

Cheapest flights from Heathrow to Southeast Asia
Explore the most affordable flight options available from Heathrow to Southeast Asia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 June 2025.

Sat 8/1121:10LHR - BKK

1 stop21h 40mShenzhen Airlines

Thu 20/1103:05BKK - LHR

1 stop23h 05mShenzhen Airlines

Deal found 12/6$927

Wed 2/722:00LHR - BKK

1 stop20h 20mHainan Airlines

Thu 17/719:20BKK - LHR

2 stops30h 10mHainan Airlines

Deal found 13/6$949

Mon 8/920:55LHR - SIN

1 stop35h 35mKLM

Mon 29/900:40SIN - LHR

1 stop17h 05mKLM

Deal found 14/6$1,024

Tue 1/722:05LHR - SIN

1 stop31h 15mGulf Air

Tue 15/720:00SIN - LHR

1 stop26h 20mGulf Air

Deal found 14/6$1,027

Sat 18/1022:05LHR - SIN

1 stop30h 50mShenzhen Airlines

Fri 24/1003:30SIN - LHR

1 stop23h 20mShenzhen Airlines

Deal found 14/6$1,030

Tue 1/720:35LHR - SIN

1 stop18h 10mMultiple Airlines

Tue 15/714:10SIN - LHR

3 stops35h 30mMultiple Airlines

Deal found 13/6$1,037

Tue 24/617:10LHR - BKK

1 stop34h 35mSWISS

Tue 22/712:50BKK - LHR

1 stop14h 55mSWISS

Deal found 12/6$1,041

Tue 24/619:30LHR - BKK

1 stop13h 20mAustrian Airlines

Sun 13/723:40BKK - LHR

1 stop25h 00mAustrian Airlines

Deal found 12/6$1,043

Tue 24/619:30LHR - BKK

1 stop13h 20mMultiple Airlines

Tue 1/723:00BKK - LHR

1 stop15h 15mMultiple Airlines

Deal found 12/6$1,044

Sat 15/1118:55LHR - SIN

Nonstop13h 00mBritish Airways

Tue 18/1123:15SIN - LHR

Nonstop14h 25mBritish Airways

Deal found 13/6$1,046

Tue 9/916:25LHR - SIN

1 stop17h 15mLufthansa

Wed 17/923:25SIN - LHR

1 stop17h 30mLufthansa

Deal found 14/6$1,064

Sun 31/822:05LHR - KUL

1 stop22h 15mShenzhen Airlines

Sat 13/904:20KUL - LHR

1 stop22h 30mShenzhen Airlines

Deal found 14/6$1,077

Best flights from Heathrow to Southeast Asia
Discover carefully curated flight deals from Heathrow to Southeast Asia that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 15 June 2025.

Sat 29/1121:10LHR - BKK

1 stop21h 40mShenzhen Airlines

Sun 14/1203:05BKK - LHR

1 stop23h 05mShenzhen Airlines

Deal found 13/6$927

Wed 2/722:00LHR - BKK

1 stop20h 20mHainan Airlines

Thu 17/719:20BKK - LHR

2 stops30h 10mHainan Airlines

Deal found 13/6$949

Wed 2/718:40LHR - BKK

1 stop33h 05mSWISS

Thu 17/712:50BKK - LHR

1 stop25h 05mSWISS

Deal found 14/6$993

Mon 8/920:55LHR - SIN

1 stop35h 35mKLM

Mon 29/900:40SIN - LHR

1 stop17h 05mKLM

Deal found 14/6$1,024

Tue 1/722:05LHR - SIN

1 stop31h 15mGulf Air

Tue 15/720:00SIN - LHR

1 stop26h 20mGulf Air

Deal found 14/6$1,027

Tue 1/720:35LHR - SIN

1 stop18h 10mMultiple Airlines

Tue 15/714:10SIN - LHR

3 stops35h 30mMultiple Airlines

Deal found 13/6$1,037

Sat 15/1118:55LHR - SIN

Nonstop13h 00mBritish Airways

Tue 18/1123:15SIN - LHR

Nonstop14h 25mBritish Airways

Deal found 13/6$1,046

Tue 24/619:30LHR - BKK

1 stop13h 20mAustrian Airlines

Fri 4/723:40BKK - LHR

1 stop28h 00mAustrian Airlines

Deal found 14/6$1,046

Tue 9/916:25LHR - SIN

1 stop17h 15mLufthansa

Wed 17/923:25SIN - LHR

1 stop17h 30mLufthansa

Deal found 14/6$1,064

Tue 1/713:15LHR - KUL

1 stop24h 40mAir India

Tue 8/708:05KUL - LHR

1 stop17h 55mAir India

Deal found 13/6$1,118

Thu 11/914:45LHR - KUL

1 stop22h 05mEtihad Airways

Mon 29/909:50KUL - LHR

1 stop15h 55mEtihad Airways

Deal found 14/6$1,154

Tue 28/1022:05LHR - SIN

Nonstop12h 55mSingapore Airlines

Tue 4/1109:00SIN - LHR

Nonstop14h 20mSingapore Airlines

Deal found 15/6$1,155

Direct flights from Heathrow to Southeast Asia
Explore direct flight options from Heathrow to Southeast Asia based on user searches, and compare prices and availability for your desired travel dates. Data last updated 15 June 2025.

Sat 15/1118:55LHR - SIN

Nonstop13h 00mBritish Airways

Tue 18/1123:15SIN - LHR

Nonstop14h 25mBritish Airways

Deal found 13/6$1,046

Wed 10/909:25LHR - SIN

Nonstop13h 05mSingapore Airlines

Thu 18/909:00SIN - LHR

Nonstop13h 45mSingapore Airlines

Deal found 14/6$1,154

Thu 6/1121:25LHR - KUL

Nonstop12h 55mMalaysia Airlines

Mon 1/1209:25KUL - LHR

Nonstop14h 00mMalaysia Airlines

Deal found 14/6$1,261

Sun 16/1120:10LHR - SIN

Nonstop13h 30mQantas Airways

Thu 20/1123:05SIN - LHR

Nonstop15h 10mQantas Airways

Deal found 14/6$1,375

Sun 12/1021:10LHR - KUL

Nonstop13h 10mBritish Airways

Sun 19/1022:50KUL - LHR

Nonstop13h 35mBritish Airways

Deal found 13/6$1,398

Wed 25/621:35LHR - BKK

Nonstop11h 55mEVA Air

Thu 3/712:45BKK - LHR

Nonstop12h 35mEVA Air

Deal found 12/6$1,519

Wed 2/721:25LHR - BKK

Nonstop11h 35mMultiple Airlines

Thu 17/712:45BKK - LHR

Nonstop12h 35mMultiple Airlines

Deal found 14/6$1,819

Sun 29/612:30LHR - BKK

Nonstop11h 30mThai Airways

Wed 2/712:35BKK - LHR

Nonstop12h 40mThai Airways

Deal found 13/6$1,939

Last-minute flights from Heathrow to Southeast Asia
Discover last-minute flight deals from Heathrow to Southeast Asia. Data last updated 15 June 2025 and is based on user searches.

Mon 16/622:05LHR - BKK

1 stop22h 10mShenzhen Airlines

Thu 10/712:10BKK - LHR

1 stop37h 50mShenzhen Airlines

Deal found 12/6$1,063

Wed 18/622:05LHR - KUL

1 stop22h 15mShenzhen Airlines

Thu 3/720:30KUL - LHR

1 stop30h 30mShenzhen Airlines

Deal found 14/6$1,170

Thu 19/617:50LHR - BKK

1 stop14h 20mLufthansa

Tue 24/623:00BKK - LHR

1 stop15h 15mLufthansa

Deal found 14/6$1,097

Fri 20/620:55LHR - BKK

1 stop30h 35mKLM

Sat 5/712:05BKK - LHR

1 stop28h 40mKLM

Deal found 14/6$1,206

Sun 22/620:55LHR - BKK

1 stop15h 40mEtihad Airways

Wed 9/709:05BKK - LHR

1 stop15h 40mEtihad Airways

Deal found 12/6$1,174

Sun 22/622:05LHR - BKK

1 stop22h 10mShenzhen Airlines

Fri 18/703:15BKK - LHR

1 stop22h 35mShenzhen Airlines

Deal found 14/6$1,243

Mon 23/610:00LHR - SIN

1 stop19h 20mGulf Air

Sun 6/720:00SIN - LHR

1 stop26h 20mGulf Air

Deal found 14/6$1,123

Mon 23/620:50LHR - HKT

2 stops19h 45mMultiple Airlines

Sun 29/620:50HKT - LHR

1 stop28h 20mMultiple Airlines

Deal found 14/6$1,161

Mon 23/622:05LHR - KUL

1 stop38h 10mShenzhen Airlines

Wed 16/704:20KUL - LHR

1 stop22h 40mShenzhen Airlines

Deal found 13/6$1,201

Mon 23/622:05LHR - SIN

1 stop21h 25mShenzhen Airlines

Sat 5/703:30SIN - LHR

1 stop23h 30mShenzhen Airlines

Deal found 14/6$1,209

Tue 24/617:10LHR - BKK

1 stop34h 35mSWISS

Tue 22/712:50BKK - LHR

1 stop14h 55mSWISS

Deal found 12/6$1,041

Tue 24/619:30LHR - BKK

1 stop13h 20mAustrian Airlines

Sun 13/723:40BKK - LHR

1 stop25h 00mAustrian Airlines

Deal found 12/6$1,043

One-way flights from Heathrow to Southeast Asia
Search for one-way flight options from Heathrow to Southeast Asia. Find affordable one-way fares based on user searches. Data last updated 15 June 2025.

Sun 28/907:00LHR - SIN

3 stops27h 40mMultiple Airlines

Deal found 13/6$659

Sat 15/1122:05LHR - SIN

Nonstop12h 55mSingapore Airlines

Deal found 14/6$670

Sun 28/922:10LHR - KUL

1 stop20h 00mChina Southern

Deal found 13/6$672

Sun 28/922:05LHR - SIN

1 stop31h 15mGulf Air

Deal found 13/6$684

Sat 21/620:50LHR - BKK

1 stop14h 55mOman Air

Deal found 12/6$688

Sat 30/822:05LHR - SIN

1 stop21h 25mShenzhen Airlines

Deal found 13/6$690

Fri 29/822:05LHR - KUL

1 stop22h 15mShenzhen Airlines

Deal found 13/6$690

Sat 27/922:10LHR - SIN

1 stop31h 20mChina Southern

Deal found 13/6$696

Sun 28/907:00LHR - KUL

3 stops24h 50mMultiple Airlines

Deal found 13/6$701

Sun 28/921:45LHR - KUL

1 stop15h 05mEtihad Airways

Deal found 14/6$708

Tue 30/918:55LHR - HKT

1 stop17h 55mQatar Airways

Deal found 14/6$721

Wed 27/806:55LHR - BKK

2 stops25h 55mLufthansa

Deal found 13/6$727

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Southeast Asia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sat 8/11

21:10-01:50

1 stop21h 40m

Bangkok Suvarnabhumi

Thu 20/11

03:05-19:10

1 stop23h 05m

$927

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Wed 2/7

22:00-00:20

1 stop20h 20m

Bangkok Suvarnabhumi

Thu 17/7

19:20-19:30

2 stops30h 10m

$949

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Mon 8/9

20:55-15:30

1 stop35h 35m

Singapore Changi

Mon 29/9

00:40-10:45

1 stop17h 05m

$1,024

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Tue 1/7

22:05-12:20

1 stop31h 15m

Singapore Changi

Tue 15/7

20:00-15:20

1 stop26h 20m

$1,027

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Sat 18/10

22:05-11:55

1 stop30h 50m

Singapore Changi

Fri 24/10

03:30-19:50

1 stop23h 20m

$1,030

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Tue 1/7

20:35-21:45

1 stop18h 10m

Singapore Changi

Tue 15/7

14:10-18:40

3 stops35h 30m

$1,037

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Tue 24/6

18:40-09:45

1 stop33h 05m

Bangkok Suvarnabhumi

Tue 15/7

12:50-07:55

1 stop25h 05m

$1,041

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Tue 24/6

06:00-14:50

1 stop26h 50m

Bangkok Suvarnabhumi

Mon 21/7

23:40-08:45

1 stop15h 05m

$1,043

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Tue 24/6

19:30-14:50

1 stop13h 20m

Bangkok Suvarnabhumi

Tue 1/7

23:00-08:15

1 stop15h 15m

$1,044

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Sat 15/11

18:55-15:55

Nonstop13h 00m

Singapore Changi

Tue 18/11

23:15-05:40

Nonstop14h 25m

$1,046

Flights are sorted by cheapest return flights first.

Deals found on 13/6

Showing 1-10 of 60 results

...

Best time to book a flight from Heathrow to Southeast Asia

Have a flexible travel schedule? Discover the best time to fly to Southeast Asia from Heathrow with our price prediction graph.

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Southeast Asia

What is the cheapest month to book a flight from London Heathrow Airport to Southeast Asia?

Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to Southeast Asia (average of $489). Flying from London Heathrow Airport to Southeast Asia in December is currently the most expensive (average of $911). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from LHR to YJX?

When flying from London Heathrow Airport to Southeast Asia, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from London Heathrow Airport to Southeast Asia

The most flights from LHR to zzYJX are scheduled on a Monday (7 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (7 on average).

Rainfall in Southeast Asia by month

In terms of precipitation, rainfall in Southeast Asia ranges from 10.0 - 320.0 inches per month. September is typically the wettest month, when rainfall can reach 320.0 mm. January is typically the driest time to visit Southeast Asia when rainfall is around 10.0 mm.

Temperature in Southeast Asia by month

If weather is an important factor for your trip to Southeast Asia, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 30.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 26.0 C).

Reviews of airlines servicing Southeast Asia

Read reviews from past customers who have flown EVA Air, China Airlines and Hainan Airlines from London to Southeast Asia. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

EVA Air

8.4

Very Good

1,203 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

EVA Air

8.4

Very Good

1,203 reviews

EVA Air

8.4

Very Good

1,203 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

China Airlines

8.3

Very Good

738 reviews

EVA Air

8.4

Very Good

1,203 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

Hainan Airlines

8.1

Very Good

39 reviews

EVA Air

8.4

Very Good

1,203 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

Garuda Indonesia

8.1

Very Good

77 reviews

EVA Air

8.4

Very Good

1,203 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

Related info for your journey

What are the cheapest airlines to fly from London Heathrow Airport to Southeast Asia one-way?
To fly one-way, consider booking your trip with Singapore Airlines, which is currently one of the cheapest options available, starting at $670. China Southern flights start at $672 while deals on Gulf Air start at $684 one-way.
What are the most popular routes from London Heathrow Airport to Southeast Asia?
The most popular route from London Heathrow Airport to Southeast Asia is London Heathrow - Bangkok Suvarnabhumi. You may also consider London Heathrow - Denpasar Bali Ngurah Rai or London Heathrow - Kuala Lumpur Intl.
What are the most reliable airlines from London Heathrow Airport to Southeast Asia?
Consider Thai Airways (62%), EVA Air (59%) or Air Canada (57%) when booking your flight. These represent the most reliable airlines when flying from London Heathrow Airport to Southeast Asia.
What are the cheapest flights from London Heathrow Airport to Southeast Asia?
Looking at all options, your cheapest flight can be booked for $792. While the most popular route (London Heathrow - Bangkok Suvarnabhumi) can be booked for $1,639 on average our data indicates $5,011 when flying from London Heathrow Airport to Southeast Asia.
Can I find deals for flights from Heathrow to Southeast Asia that include hotel bookings?
Yes. In addition to deals on Heathrow to Southeast Asia flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Heathrow to Southeast Asia?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Southeast Asia.
Can I find deals for business class flights from Heathrow to Southeast Asia?
Yes. Cheapflights offers flight deals from Heathrow to Southeast Asia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from London Heathrow Airport to Southeast Asia?
Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to Southeast Asia (average of $489). Flying from London Heathrow Airport to Southeast Asia in December is currently the most expensive (average of $911). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Heathrow to Southeast Asia

Heathrow to Suvarnabhumi flights

Heathrow to Singapore flights

Gatwick to Suvarnabhumi flights

Complete your trip

Kastrup Copenhagen Airport car hire

Los Angeles Airport car hire

Incheon Intl Airport car hire

Madrid Barajas Airport car hire

Bangkok Suvarnabhumi Airport car hire

Barcelona-El Prat Airport car hire

San Francisco Airport car hire

Miami Airport car hire

Lisbon Humberto Delgado Airport car hire

Amsterdam Schiphol Airport car hire

Frankfurt am Main Airport car hire

Boston Logan Intl Airport car hire

Direct flights to

Top 2 airlines flying from Heathrow to Southeast Asia

Airline	Cheapest	Average	Flexibility	On-time
Etihad Airways	Cheapest$1,177	Average$1,351	FlexibilityNo cancel fee	On-time75%	Search Etihad Airways flights
Thai Airways	Cheapest$1,190	Average$1,234	FlexibilityNo cancel fee	On-time77%	Search Thai Airways flights

Fly with Cheapflights

How does Cheapflights help users find flights from Heathrow to Southeast Asia?

When you search for this flight from Heathrow to Southeast Asia, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Southeast Asia?

Cheapflights helps you find that perfect flight to Southeast Asia from Heathrow by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Heathrow to Southeast Asia with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Heathrow to Southeast Asia flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Heathrow to Southeast Asia become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Southeast Asia from Heathrow today and book when prices fit your budget.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from London Heathrow Airport to Southeast Asia from $659

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 28/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Heathrow to Southeast Asia

Keep the following information in mind while searching for Heathrow to Southeast Asia flight deals. Data was last updated 15 June 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Heathrow to Southeast Asia

Cheapest flights from Heathrow to Southeast AsiaExplore the most affordable flight options available from Heathrow to Southeast Asia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 June 2025.

Explore the most affordable flight options available from Heathrow to Southeast Asia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 June 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Southeast Asia that are best for you.

Best time to book a flight from Heathrow to Southeast Asia

Have a flexible travel schedule? Discover the best time to fly to Southeast Asia from Heathrow with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Southeast Asia

What is the cheapest month to book a flight from London Heathrow Airport to Southeast Asia?

What is the cheapest time of day to fly from LHR to YJX?

Find hourly flight availability from Heathrow to Southeast Asia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 15 June 2025.

Weekly flight availability from London Heathrow Airport to Southeast Asia

Rainfall in Southeast Asia by month

Plan your trip to Southeast Asia by taking into account the average rainfall totals by month.

Temperature in Southeast Asia by month

Plan your trip to Southeast Asia by taking into account the average temperature totals by month.

Reviews of airlines servicing Southeast Asia

Read reviews from past customers who have flown EVA Air, China Airlines and Hainan Airlines from London to Southeast Asia. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Southeast Asia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the cheapest airlines to fly from London Heathrow Airport to Southeast Asia one-way?

What are the most popular routes from London Heathrow Airport to Southeast Asia?

What are the most reliable airlines from London Heathrow Airport to Southeast Asia?

What are the cheapest flights from London Heathrow Airport to Southeast Asia?

Can I find deals for flights from Heathrow to Southeast Asia that include hotel bookings?

How can I find direct flights from Heathrow to Southeast Asia?

Can I find deals for business class flights from Heathrow to Southeast Asia?

What is the cheapest month to book a flight from London Heathrow Airport to Southeast Asia?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Heathrow to Southeast Asia

See prices for flight routes from nearby airports that may be better suited for you.

Top 2 airlines flying from Heathrow to Southeast Asia

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Heathrow to Southeast Asia?

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Southeast Asia?

Can Cheapflights find flights from Heathrow to Southeast Asia with no change fees?

Can Cheapflights notify me if prices for flights from Heathrow to Southeast Asia become cheaper?

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Heathrow to Southeast Asia
Explore the most affordable flight options available from Heathrow to Southeast Asia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 June 2025.