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Southeast Asia

$356+ Cheap flights from Heathrow (LHR) to Southeast Asia

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 5/15. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BKK
Mar 6 — Mar 131
Fri 3/6
Fri 3/13
1 adult, Economy
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Cheap 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 February 4, 2026.

This Booking.com deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/2910:40 pm
LHR
-
BKK
1 stop37h 40m
Air China
Fri 6/51:30 am
BKK
-
LHR
1 stop24h 55m
Air China
Deal found 2/4$549
This Trip.com deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/135:40 pm
LHR
-
BKK
1 stop17h 25m
Air China
Mon 3/301:30 am
BKK
-
LHR
1 stop24h 55m
Air China
Deal found 2/3$550
This Air China deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air China is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/210:00 pm
LHR
-
BKK
1 stop37h 05m
Air China
Mon 5/251:30 am
BKK
-
LHR
1 stop22h 10m
Air China
Deal found 2/3$555
This FlightHub deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/179:20 pm
LHR
-
HAN
1 stop22h 00m
China Eastern
Mon 6/13:00 pm
HAN
-
LHR
1 stop33h 40m
China Eastern
Deal found 2/3$557
This FlightHub deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/109:20 pm
LHR
-
BKK
1 stop17h 35m
China Eastern
Sat 5/165:05 am
BKK
-
LHR
1 stop19h 35m
China Eastern
Deal found 2/4$557
This Kiwi.com deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/712:30 pm
LHR
-
BKK
1 stop19h 05m
Air India
Wed 4/228:20 pm
BKK
-
LHR
1 stop21h 10m
Air India
Deal found 2/3$558
This FlightHub deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/59:20 pm
LHR
-
HKT
1 stop18h 40m
China Eastern
Thu 5/146:55 pm
HKT
-
LHR
2 stops29h 45m
China Eastern
Deal found 2/3$559
This Kiwi.com deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/179:00 pm
LHR
-
BKK
1 stop18h 25m
China Eastern
Tue 3/177:55 pm
BKK
-
LHR
1 stop28h 35m
China Eastern
Deal found 2/2$559
This China Eastern deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure China Eastern is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/149:00 pm
LHR
-
HAN
1 stop21h 45m
China Eastern
Mon 3/236:45 pm
HAN
-
LHR
1 stop29h 45m
China Eastern
Deal found 2/2$561
This FlightHub deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/117:45 pm
LHR
-
BKK
1 stop31h 20m
Hainan Airlines
Thu 5/147:20 pm
BKK
-
LHR
2 stops30h 10m
Hainan Airlines
Deal found 2/3$561
This China Eastern deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure China Eastern is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/149:00 pm
LHR
-
HAN
1 stop21h 45m
China Eastern
Tue 3/312:20 am
HAN
-
LHR
1 stop22h 20m
China Eastern
Deal found 2/4$562
This China Eastern deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure China Eastern is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/189:00 pm
LHR
-
BKK
1 stop19h 55m
China Eastern
Tue 3/177:55 pm
BKK
-
LHR
1 stop28h 35m
China Eastern
Deal found 2/2$562

Find 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 February 4, 2026.

Round-trip from

$550
(Trip.com)

One-way from

$356
(Kiwi.com)

Popular in

December

Cheapest in

May

Average price

$838
From London Heathrow to Southeast Asia
Search Deals
One-way flight from London Heathrow to Southeast Asia
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($43 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated February 4, 2026.
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

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Wed 2/18

9:00 pm-11:55 pm

1 stop19h 55m

Bangkok Suvarnabhumi

Fri 3/13

5:45 am-5:30 pm

1 stop18h 45m

$562

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Tue 2/17

9:00 pm-1:55 am

1 stop21h 55m

Bangkok Suvarnabhumi

Wed 3/11

2:20 am-5:30 pm

2 stops22h 10m

$569

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Tue 3/10

9:00 pm-10:45 pm

1 stop18h 45m

Phuket City

Tue 3/17

7:35 pm-5:30 pm

2 stops52h 55m

$571

LondonHanoi

LHR - HAN

LHRHAN

London Heathrow

Sun 3/15

9:00 pm-3:15 pm

3 stops59h 15m

Hanoi Noibai

Wed 3/18

6:45 pm-5:30 pm

1 stop29h 45m

$579

LondonHanoi

LHR - HAN

LHRHAN

London Heathrow

Wed 5/20

9:20 pm-1:20 am

1 stop22h 00m

Hanoi Noibai

Mon 6/1

6:45 pm-6:40 pm

1 stop29h 55m

$580

LondonHanoi

LHR - HAN

LHRHAN

London Heathrow

Wed 5/27

9:20 pm-1:20 am

1 stop22h 00m

Hanoi Noibai

Tue 6/2

6:45 pm-6:40 pm

1 stop29h 55m

$580

LondonHanoi

LHR - HAN

LHRHAN

London Heathrow

Tue 5/26

9:20 pm-1:20 am

1 stop22h 00m

Hanoi Noibai

Wed 6/3

2:20 am-6:40 pm

1 stop22h 20m

$580

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sat 3/7

9:10 pm-6:30 pm

1 stop38h 20m

Bangkok Suvarnabhumi

Sun 6/14

3:15 am-7:50 pm

1 stop22h 35m

$618

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sat 5/23

10:05 pm-6:30 pm

1 stop38h 25m

Bangkok Suvarnabhumi

Sat 6/13

7:30 pm-8:00 pm

1 stop30h 30m

$635

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Fri 3/6

9:00 pm-3:10 am

2 stops22h 10m

Singapore Changi

Thu 3/12

7:25 pm-6:40 am

1 stop19h 15m

$653

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/4

Showing 1-10 of 60 results
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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 round-trip 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, November is the cheapest month in which you can book a flight from London Heathrow Airport to Southeast Asia (average of $498). Flying from London Heathrow Airport to Southeast Asia in July is currently the most expensive (average of $730). 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 February 4, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Heathrow Airport to Southeast Asia as you normally would.

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 February 4, 2026.

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 February 4, 2026.
Read through reviews of airlines operating flights from London Heathrow Airport to Southeast Asia, such as Singapore Airlines, Cathay Pacific, and Qatar Airways. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Singapore Airlines
8.2
Very good
1,449 reviews

Boarding

8.3

Food

7.8

Overall

8.2

Comfort

8.0

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BCN - SIN

Staff at Barcelona were fantastic, they helped me change a flight and nothing was any problem. Thank you Dina.
Singapore Airlines
8.2
Very good
1,449 reviews
Singapore Airlines
8.2
Very good
1,449 reviews

Boarding

8.3

Food

7.8

Overall

8.2

Comfort

8.0

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BCN - SIN

Staff at Barcelona were fantastic, they helped me change a flight and nothing was any problem. Thank you Dina.
Cathay Pacific
7.6
Good
1,159 reviews
Singapore Airlines
8.2
Very good
1,449 reviews

Boarding

8.3

Food

7.8

Overall

8.2

Comfort

8.0

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BCN - SIN

Staff at Barcelona were fantastic, they helped me change a flight and nothing was any problem. Thank you Dina.
Qatar Airways
7.4
Good
3,731 reviews
Singapore Airlines
8.2
Very good
1,449 reviews

Boarding

8.3

Food

7.8

Overall

8.2

Comfort

8.0

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BCN - SIN

Staff at Barcelona were fantastic, they helped me change a flight and nothing was any problem. Thank you Dina.
China Southern
7.3
Good
137 reviews
Singapore Airlines
8.2
Very good
1,449 reviews

Boarding

8.3

Food

7.8

Overall

8.2

Comfort

8.0

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BCN - SIN

Staff at Barcelona were fantastic, they helped me change a flight and nothing was any problem. Thank you Dina.
Air China
7.2
Good
138 reviews
Singapore Airlines
8.2
Very good
1,449 reviews

Boarding

8.3

Food

7.8

Overall

8.2

Comfort

8.0

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BCN - SIN

Staff at Barcelona were fantastic, they helped me change a flight and nothing was any problem. Thank you Dina.

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.

  • How long is the flight from London Heathrow Airport to Southeast Asia?

    A quick flight from London Heathrow Airport to Southeast Asia can take about 18h 30m. China Eastern provides one of the quickest options available for as low as $645. There are 6757 mi between London Heathrow Airport and Southeast Asia. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    The cheapest airline one-way is Shenzhen Airlines, with whom users have recently found tickets for as low as $207. However, be on the lookout for offers from SAUDIA and China Eastern, as they are both options that can get you from London Heathrow Airport to Southeast Asia for a low price.

  • 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 - Langkawi or London Heathrow - Manila Ninoy Aquino Intl.

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

    Before booking your flight to Southeast Asia from London Heathrow Airport, check out the most reliable airlines to get you to your destination on time: Thai Airways (82%), EVA Air (80%), Air Canada( 79%).

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

    On average you can expect to pay $2,418 for a flight from London Heathrow Airport to Southeast Asia. The cheapest flight overall is $633 while the most popular route, (London Heathrow - Bangkok Suvarnabhumi) is currently priced at $516.

  • 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 vacation 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, November is the cheapest month in which you can book a flight from London Heathrow Airport to Southeast Asia (average of $498). Flying from London Heathrow Airport to Southeast Asia in July is currently the most expensive (average of $730). 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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Top 10 airlines flying from Heathrow to Southeast Asia

Discover the top 10 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 2,558,603 searches. Data last updated February 4, 2026.
AirlineCheapestAverageFlexibilityOn-time
SAUDIACheapest$407Average$840FlexibilityNo cancel feeOn-time86%
Hainan AirlinesCheapest$434Average$709FlexibilityNo cancel feeOn-time61%
Air IndiaCheapest$472Average$816FlexibilityNo cancel feeOn-timeN/A
Shenzhen AirlinesCheapest$494Average$581FlexibilityNo cancel feeOn-time63%
China EasternCheapest$539Average$658FlexibilityNo cancel feeOn-time62%
China SouthernCheapest$540Average$680FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$608Average$934FlexibilityNo cancel feeOn-time70%
Austrian AirlinesCheapest$641Average$925FlexibilityNo cancel feeOn-time78%
Gulf AirCheapest$645Average$823FlexibilityNo cancel feeOn-time67%
Oman AirCheapest$657Average$832FlexibilityNo cancel feeOn-time76%

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