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Southeast Asia

$351+ 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 9/21. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BKK
oct. 11 — oct. 181
sáb. 10/11
sáb. 10/18
1 adult, Economy
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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 septiembre 11, 2025.

Round-trip from

$556
(Shenzhen Airlines)

One-way from

$351
(Booking.com)

Popular in

December

Cheapest in

November

Average price

$752
From London Heathrow to Southeast Asia
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One-way flight from London Heathrow to Southeast Asia
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Highest demand for flights based on searches. 4% potential increase in price ($46 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($32 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 septiembre 11, 2025.

This Shenzhen Airlines deal was found by Cheapflights users on 9/11. 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 Shenzhen Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 9/2810:05 pmLHR - HAN
1 stop21h 05mShenzhen Airlines
sáb. 10/42:10 amHAN - LHR
1 stop23h 50mShenzhen Airlines
Deal found 9/11$556
This Shenzhen Airlines deal was found by Cheapflights users on 9/10. 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 Shenzhen Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 9/2810:05 pmLHR - HAN
1 stop28h 35mShenzhen Airlines
sáb. 10/252:10 amHAN - LHR
1 stop24h 00mShenzhen Airlines
Deal found 9/10$557
This Air China deal was found by Cheapflights users on 9/10. 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.
mié. 11/268:25 pmLHR - HAN
1 stop32h 35mAir China
dom. 12/71:20 pmHAN - LHR
1 stop33h 35mAir China
Deal found 9/10$562
This Shenzhen Airlines deal was found by Cheapflights users on 9/11. 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 Shenzhen Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/2010:05 pmLHR - HAN
1 stop34h 00mShenzhen Airlines
jue. 10/93:05 pmHAN - LHR
1 stop34h 55mShenzhen Airlines
Deal found 9/11$592
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
lun. 11/105:40 pmLHR - BKK
1 stop17h 25mAir China
sáb. 11/151:30 amBKK - LHR
1 stop21h 25mAir China
Deal found 9/10$597
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
mié. 11/58:30 pmLHR - BKK
1 stop16h 05mAir India
mar. 11/252:45 pmBKK - LHR
1 stop27h 20mAir India
Deal found 9/10$599
This FlightHub deal was found by Cheapflights users on 9/10. 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.
mié. 11/199:00 pmLHR - SGN
1 stop21h 10mChina Eastern
mar. 12/162:10 amSGN - LHR
1 stop22h 20mChina Eastern
Deal found 9/10$600
This FlightHub deal was found by Cheapflights users on 9/11. 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.
mar. 11/189:00 pmLHR - SGN
1 stop21h 10mChina Eastern
lun. 11/242:10 amSGN - LHR
1 stop22h 20mChina Eastern
Deal found 9/11$602
This Air China deal was found by Cheapflights users on 9/10. 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.
vie. 10/319:10 pmLHR - BKK
1 stop31h 00mShenzhen Airlines
sáb. 11/223:15 amBKK - LHR
1 stop22h 55mShenzhen Airlines
Deal found 9/10$602
This Shenzhen Airlines deal was found by Cheapflights users on 9/10. 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 Shenzhen Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/39:10 pmLHR - BKK
1 stop22h 05mShenzhen Airlines
jue. 11/203:15 amBKK - LHR
1 stop22h 55mShenzhen Airlines
Deal found 9/10$603
This Shenzhen Airlines deal was found by Cheapflights users on 9/10. 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 Shenzhen Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/79:10 pmLHR - BKK
1 stop38h 20mShenzhen Airlines
mar. 11/257:30 pmBKK - LHR
1 stop30h 40mShenzhen Airlines
Deal found 9/10$604
This FlightHub deal was found by Cheapflights users on 9/10. 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.
vie. 11/149:00 pmLHR - HAN
1 stop21h 45mChina Eastern
jue. 11/202:20 pmHAN - LHR
1 stop34h 10mChina Eastern
Deal found 9/10$605

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 septiembre 11, 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

LondonHanoi

LHR - HAN

LHRHAN

London Heathrow

dom. 9/28

10:05 pm-1:10 am

1 stop21h 05m

Hanoi Noibai

sáb. 10/4

2:10 am-8:00 pm

1 stop23h 50m

$556

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

sáb. 11/8

9:10 pm-2:15 am

1 stop22h 05m

Bangkok Suvarnabhumi

vie. 11/14

3:15 am-7:10 pm

1 stop22h 55m

$603

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

mié. 11/5

9:10 pm-11:10 am

1 stop31h 00m

Bangkok Suvarnabhumi

jue. 11/20

3:15 am-7:10 pm

1 stop22h 55m

$603

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

sáb. 11/8

9:10 pm-2:15 am

1 stop22h 05m

Bangkok Suvarnabhumi

sáb. 11/22

3:15 am-7:10 pm

1 stop22h 55m

$603

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

jue. 11/6

5:50 pm-5:25 pm

1 stop15h 35m

Singapore Changi

mié. 11/19

12:05 am-8:05 am

1 stop16h 00m

$614

LondonHo Chi Minh City

LHR - SGN

LHRSGN

London Heathrow

mié. 10/29

9:10 pm-1:50 am

1 stop21h 40m

Ho Chi Minh City

vie. 11/7

2:50 am-7:10 pm

1 stop23h 20m

$624

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

lun. 11/3

5:50 pm-5:25 pm

1 stop15h 35m

Singapore Changi

vie. 11/7

12:05 am-8:05 am

1 stop16h 00m

$654

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

jue. 2/26

5:50 pm-2:50 pm

1 stop14h 00m

Bangkok Suvarnabhumi

lun. 3/16

2:00 pm-9:40 pm

1 stop14h 40m

$671

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

mié. 10/8

8:55 pm-6:30 am

1 stop27h 35m

Bangkok Suvarnabhumi

mar. 10/14

2:55 am-3:15 pm

1 stop18h 20m

$684

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

dom. 10/5

8:55 pm-6:30 am

1 stop27h 35m

Bangkok Suvarnabhumi

jue. 10/16

8:55 pm-3:15 pm

1 stop24h 20m

$685

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

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, September is the cheapest month in which you can book a flight from London Heathrow Airport to Southeast Asia (average of $908). Flying from London Heathrow Airport to Southeast Asia in December is currently the most expensive (average of $1,518). 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 septiembre 11, 2025.

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 septiembre 11, 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 septiembre 11, 2025.
Read through reviews of airlines operating flights from London Heathrow Airport to Southeast Asia, such as Singapore Airlines, Thai Airways, and China Southern. 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
8.1
Very good
1,365 reviews

Boarding

8.2

Entertainment

8.0

Comfort

8.0

Food

7.7

Crew

8.6

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2024

NRT - LAX

Crew and in flight experience were great! I felt safe in the plane. Only downside was sitting in economy and the seat/person in front of me who had their seat reclined most of the flight (9 hrs) which made it difficult to eat or be fully comfortable.
Singapore Airlines
8.1
Very good
1,365 reviews
Singapore Airlines
8.1
Very good
1,365 reviews

Boarding

8.2

Entertainment

8.0

Comfort

8.0

Food

7.7

Crew

8.6

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2024

NRT - LAX

Crew and in flight experience were great! I felt safe in the plane. Only downside was sitting in economy and the seat/person in front of me who had their seat reclined most of the flight (9 hrs) which made it difficult to eat or be fully comfortable.
Thai Airways
7.8
Good
350 reviews
Singapore Airlines
8.1
Very good
1,365 reviews

Boarding

8.2

Entertainment

8.0

Comfort

8.0

Food

7.7

Crew

8.6

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2024

NRT - LAX

Crew and in flight experience were great! I felt safe in the plane. Only downside was sitting in economy and the seat/person in front of me who had their seat reclined most of the flight (9 hrs) which made it difficult to eat or be fully comfortable.
China Southern
7.5
Good
110 reviews
Singapore Airlines
8.1
Very good
1,365 reviews

Boarding

8.2

Entertainment

8.0

Comfort

8.0

Food

7.7

Crew

8.6

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2024

NRT - LAX

Crew and in flight experience were great! I felt safe in the plane. Only downside was sitting in economy and the seat/person in front of me who had their seat reclined most of the flight (9 hrs) which made it difficult to eat or be fully comfortable.
Qatar Airways
7.4
Good
3,624 reviews
Singapore Airlines
8.1
Very good
1,365 reviews

Boarding

8.2

Entertainment

8.0

Comfort

8.0

Food

7.7

Crew

8.6

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2024

NRT - LAX

Crew and in flight experience were great! I felt safe in the plane. Only downside was sitting in economy and the seat/person in front of me who had their seat reclined most of the flight (9 hrs) which made it difficult to eat or be fully comfortable.
Air China
7.2
Good
99 reviews
Singapore Airlines
8.1
Very good
1,365 reviews

Boarding

8.2

Entertainment

8.0

Comfort

8.0

Food

7.7

Crew

8.6

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2024

NRT - LAX

Crew and in flight experience were great! I felt safe in the plane. Only downside was sitting in economy and the seat/person in front of me who had their seat reclined most of the flight (9 hrs) which made it difficult to eat or be fully comfortable.

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 21h 05m. Shenzhen Airlines provides one of the quickest options available for as low as $556. There are 5736 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 $357. However, be on the lookout for offers from Austrian Airlines 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: EVA Air (82%), Thai Airways (77%), Air Canada( 69%).

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

    On average you can expect to pay $2,701 for a flight from London Heathrow Airport to Southeast Asia. The cheapest flight overall is $646 while the most popular route, (London Heathrow - Bangkok Suvarnabhumi) is currently priced at $584.

  • 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, September is the cheapest month in which you can book a flight from London Heathrow Airport to Southeast Asia (average of $908). Flying from London Heathrow Airport to Southeast Asia in December is currently the most expensive (average of $1,518). 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.

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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.
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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 septiembre 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
SAUDIACheapest$407Average$846FlexibilityNo cancel feeOn-time86%
Shenzhen AirlinesCheapest$457Average$568FlexibilityNo cancel feeOn-time63%
China EasternCheapest$519Average$668FlexibilityNo cancel feeOn-time62%
China SouthernCheapest$555Average$736FlexibilityNo cancel feeOn-time69%
Hainan AirlinesCheapest$560Average$636FlexibilityNo cancel feeOn-time61%
Air IndiaCheapest$590Average$835FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$620Average$941FlexibilityNo cancel feeOn-time70%
Gulf AirCheapest$625Average$780FlexibilityNo cancel feeOn-time67%
Austrian AirlinesCheapest$641Average$1,152FlexibilityNo cancel feeOn-time78%
Oman AirCheapest$687Average$809FlexibilityNo cancel feeOn-time76%

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