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Cheap flights from London Heathrow Airport to Southeast Asia from $612

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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BKK
9 Jul — 16 Jul1
1 adult

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 4 July 2025.

Round-trip from

$972

One-way from

$612

Popular in

December

Cheapest in

May

Average price

$1,706
Oman Air
  • Oman Air
  • 1/9-30/10
  • 2 total stops
  • 44h 55m total
  • London to Southeast Asia
Search Deals
China Southern
  • China Southern
  • 1/9
  • 1 total stop
  • 17h 50m total
  • London to Southeast Asia
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($182 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($69 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 4 July 2025.

Thu 20/1116:40LHR - SIN
1 stop16h 45mLufthansa
Wed 3/1223:45SIN - LHR
1 stop26h 50mLufthansa
Deal found 3/7$974
Tue 28/1016:30LHR - SIN
1 stop16h 30mMultiple Airlines
Mon 3/1100:05SIN - LHR
1 stop19h 10mMultiple Airlines
Deal found 4/7$975
Sun 2/1105:00LHR - SIN
1 stop27h 50mSWISS
Tue 18/1100:05SIN - LHR
1 stop16h 00mSWISS
Deal found 3/7$977
Thu 27/1120:05LHR - BKK
1 stop27h 40mOman Air
Fri 12/1220:05BKK - LHR
1 stop16h 50mOman Air
Deal found 2/7$1,007
Wed 26/1113:55LHR - SIN
1 stop35h 10mEtihad Airways
Mon 2/320:40SIN - LHR
1 stop29h 45mEtihad Airways
Deal found 3/7$1,042
Sat 20/922:05LHR - SIN
1 stop21h 25mShenzhen Airlines
Sun 28/903:30SIN - LHR
1 stop23h 20mShenzhen Airlines
Deal found 3/7$1,056
Fri 7/1121:10LHR - BKK
1 stop22h 05mShenzhen Airlines
Fri 21/1103:15BKK - LHR
1 stop22h 55mShenzhen Airlines
Deal found 3/7$1,059
Sun 19/1022:05LHR - KUL
1 stop22h 15mShenzhen Airlines
Thu 13/1120:30KUL - LHR
1 stop30h 40mShenzhen Airlines
Deal found 2/7$1,076
Sun 24/806:00LHR - BKK
1 stop21h 45mSWISS
Tue 16/912:35BKK - LHR
1 stop15h 10mSWISS
Deal found 3/7$1,092
Fri 22/806:30LHR - BKK
1 stop21h 00mMultiple Airlines
Thu 18/911:35BKK - LHR
1 stop15h 50mMultiple Airlines
Deal found 3/7$1,095
Mon 1/920:25LHR - BKK
1 stop35h 45mLufthansa
Mon 3/1123:30BKK - LHR
1 stop17h 55mLufthansa
Deal found 3/7$1,109
Sun 5/1022:05LHR - SIN
1 stop31h 15mGulf Air
Wed 8/1020:00SIN - LHR
1 stop17h 55mGulf Air
Deal found 2/7$1,112

Cheapflights Fare Finder

Customise your flight search to find flights from Heathrow to Southeast Asia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 647,157 searches. Data last updated 4 July 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Southeast Asia that are best for you.

Fly from

Heathrow

Fly to

Southeast Asia

Route

Depart

Return

Price

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Thu 20/11

16:40-17:25

1 stop16h 45m

Singapore Changi

Wed 3/12

23:45-18:35

1 stop26h 50m

$974

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Tue 28/10

16:30-17:00

1 stop16h 30m

Singapore Changi

Mon 3/11

00:05-11:15

1 stop19h 10m

$975

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Sun 2/11

05:00-16:50

1 stop27h 50m

Singapore Changi

Tue 18/11

00:05-08:05

1 stop16h 00m

$977

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Thu 27/11

20:05-06:45

1 stop27h 40m

Bangkok Suvarnabhumi

Fri 12/12

20:05-05:55

1 stop16h 50m

$1,007

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Wed 26/11

13:55-09:05

1 stop35h 10m

Singapore Changi

Mon 2/3

20:40-18:25

1 stop29h 45m

$1,042

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Sat 20/9

22:05-02:30

1 stop21h 25m

Singapore Changi

Sun 28/9

03:30-19:50

1 stop23h 20m

$1,056

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Fri 7/11

21:10-02:15

1 stop22h 05m

Bangkok Suvarnabhumi

Fri 21/11

03:15-19:10

1 stop22h 55m

$1,059

LondonKuala Lumpur

LHR - KUL

LHRKUL

London Heathrow

Sun 19/10

22:05-03:20

1 stop22h 15m

Kuala Lumpur Intl

Thu 13/11

20:30-19:10

1 stop30h 40m

$1,076

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sun 24/8

06:00-09:45

1 stop21h 45m

Bangkok Suvarnabhumi

Tue 16/9

12:35-21:45

1 stop15h 10m

$1,092

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Fri 22/8

06:30-09:30

1 stop21h 00m

Bangkok Suvarnabhumi

Thu 18/9

11:35-21:25

1 stop15h 50m

$1,095

Flights are sorted by cheapest return flights first.

Deals found on 2/7

Showing 1-10 of 60 results
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6

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?

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 4 July 2025.

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

Explore weekly flight availability from Heathrow to Southeast Asia. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 4 July 2025.

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).

Reviews of airlines servicing Southeast Asia

Get insights into the airlines that provide service to Southeast Asia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Southeast Asia. Reviews last updated 4 July 2025.
See what other customers who have flown with China Airlines, Hainan Airlines, andGaruda Indonesia from London Heathrow Airport to Southeast Asia have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
China Airlines
8.3
Very Good
744 reviews
Check prices

Boarding

8.3

Entertainment

8.0

Crew

8.5

Food

7.8

Overall

8.3

Comfort

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver
China Airlines
8.3
Very Good
744 reviews
China Airlines
8.3
Very Good
744 reviews
Check prices

Boarding

8.3

Entertainment

8.0

Crew

8.5

Food

7.8

Overall

8.3

Comfort

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver
Hainan Airlines
8.2
Very Good
41 reviews
China Airlines
8.3
Very Good
744 reviews
Check prices

Boarding

8.3

Entertainment

8.0

Crew

8.5

Food

7.8

Overall

8.3

Comfort

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver
Garuda Indonesia
8.1
Very Good
77 reviews
China Airlines
8.3
Very Good
744 reviews
Check prices

Boarding

8.3

Entertainment

8.0

Crew

8.5

Food

7.8

Overall

8.3

Comfort

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver
Singapore Airlines
8.1
Very Good
1,320 reviews
China Airlines
8.3
Very Good
744 reviews
Check prices

Boarding

8.3

Entertainment

8.0

Crew

8.5

Food

7.8

Overall

8.3

Comfort

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver

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?

    To fly one-way, consider booking your trip with China Southern, which is currently one of the cheapest options available, starting at $612. Oman Air flights start at $615 while deals on Hainan Airlines start at $621 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 - Kuala Lumpur Intl or London Heathrow - Singapore Changi.

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

    Consider Thai Airways (71%), EVA Air (70%) or Air Canada (67%) 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 $1,058. While the most popular route (London Heathrow - Bangkok Suvarnabhumi) can be booked for $1,363 on average our data indicates $1,935 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

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Alternative routes for Heathrow to Southeast Asia

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Suvarnabhumi flights
Gatwick to Suvarnabhumi flights
Heathrow to Singapore flights

Top 2 airlines flying from Heathrow to Southeast Asia

Discover the top 2 airlines that operate flights from Heathrow to Southeast Asia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 647,157 searches. Data last updated 4 July 2025.
AirlineCheapestAverageFlexibilityOn-time
Etihad AirwaysCheapest$1,162Average$1,335FlexibilityNo cancel feeOn-time75%
Search Etihad Airways flights
Thai AirwaysCheapest$1,175Average$1,219FlexibilityNo cancel feeOn-time77%
Search Thai Airways flights

Fly with Cheapflights

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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.

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