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Southeast Asia

$403+ Cheap flights from London (LON) 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 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BKK
ago. 5 — ago. 121
mar. 8/5
mar. 8/12
1 adult, Economy
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Cheap flight deals from London to Southeast Asia

Keep the following information in mind while searching for London to Southeast Asia flight deals. Data was last updated julio 31, 2025.

Round-trip from

$649
(FlightHub)

One-way from

$404
(Norse)

Popular in

December

Cheapest in

November

Average price

$1,185
From London (LON) to Southeast Asia
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One-way flight from London (LON) to Southeast Asia
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Highest demand for flights based on searches. 4% potential increase in price ($42 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($31 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from London to Southeast Asia

Cheapest flights from London to Southeast Asia
Explore the most affordable flight options available from London to Southeast Asia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 31, 2025.

This FlightHub deal was found by Cheapflights users on 7/31. 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.
lun. 9/110:05 pmLHR - HAN
1 stop28h 35mShenzhen Airlines
dom. 9/142:10 amHAN - LHR
1 stop23h 40mShenzhen Airlines
Deal found 7/31$649
This FlightHub deal was found by Cheapflights users on 7/30. 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.
lun. 9/2212:30 pmLHR - SIN
1 stop23h 00mAir India
mié. 9/248:30 pmSIN - LHR
1 stop29h 30mAir India
Deal found 7/30$660
This Gotogate deal was found by Cheapflights users on 7/30. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/2510:10 pmLHR - HAN
1 stop30h 35mChina Southern
vie. 10/106:00 pmHAN - LHR
1 stop31h 00mChina Southern
Deal found 7/30$661
This SWISS deal was found by Cheapflights users on 7/31. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/178:55 amLHR - SIN
2 stops25h 10mSWISS
mar. 9/3011:20 pmSIN - LHR
1 stop15h 35mSWISS
Deal found 7/31$661
This FlightHub deal was found by Cheapflights users on 7/31. 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. 9/1910:05 pmLHR - SIN
1 stop30h 50mShenzhen Airlines
sáb. 9/273:30 amSIN - LHR
1 stop23h 30mShenzhen Airlines
Deal found 7/31$662
This SWISS deal was found by Cheapflights users on 7/31. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/256:40 pmLGW - SIN
1 stop15h 20mSWISS
vie. 12/2612:05 amSIN - LGW
1 stop25h 45mSWISS
Deal found 7/31$663
This Finnair deal was found by Cheapflights users on 7/31. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 9/1410:20 amLHR - SIN
1 stop25h 05mFinnair
dom. 9/219:35 pmSIN - LHR
1 stop31h 35mFinnair
Deal found 7/31$664
This Lufthansa deal was found by Cheapflights users on 7/30. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/34:40 pmLHR - SIN
1 stop16h 45mLufthansa
lun. 12/811:55 pmSIN - LHR
1 stop17h 50mLufthansa
Deal found 7/30$665
This Etihad Airways deal was found by Cheapflights users on 7/30. 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 Etihad Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/309:45 pmLHR - SIN
1 stop28h 55mEtihad Airways
mié. 9/179:10 pmSIN - LHR
1 stop22h 35mEtihad Airways
Deal found 7/30$678
This Mytrip deal was found by Cheapflights users on 7/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/1211:25 amLGW - SIN
1 stop17h 55mGulf Air
sáb. 9/208:00 pmSIN - LGW
1 stop17h 55mGulf Air
Deal found 7/30$678
This China Eastern deal was found by Cheapflights users on 7/31. 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.
lun. 10/275:00 pmLGW - BKK
2 stops26h 05mChina Eastern
sáb. 11/81:35 pmBKK - LGW
1 stop31h 25mChina Eastern
Deal found 7/31$679
This Trip.com deal was found by Cheapflights users on 7/31. 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.
jue. 9/119:05 pmLHR - BKK
1 stop16h 30mAir India
vie. 9/198:50 pmBKK - LHR
1 stop19h 25mAir India
Deal found 7/31$679

Cheapflights Fare Finder

 
Customize your flight search to find flights from London 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 julio 31, 2025.
Use the filters below to find and compare flights from London to Southeast Asia that are best for you.

Fly from

London

Fly to

Southeast Asia

Route

Depart

Return

Price

LondonHanoi

LHR - HAN

LHRHAN

London Heathrow

lun. 9/1

10:05 pm-8:40 am

1 stop28h 35m

Hanoi Noibai

dom. 9/14

2:10 am-7:50 pm

1 stop23h 40m

$649

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

lun. 9/22

12:30 pm-6:30 pm

1 stop23h 00m

Singapore Changi

mié. 9/24

8:30 pm-7:00 pm

1 stop29h 30m

$660

LondonHanoi

LHR - HAN

LHRHAN

London Heathrow

jue. 9/25

10:10 pm-10:45 am

1 stop30h 35m

Hanoi Noibai

vie. 10/10

6:00 pm-7:00 pm

1 stop31h 00m

$661

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

mié. 9/17

2:25 pm-5:05 pm

2 stops19h 40m

Singapore Changi

mar. 10/7

11:20 pm-11:25 am

1 stop19h 05m

$661

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

vie. 9/19

10:05 pm-11:55 am

1 stop30h 50m

Singapore Changi

sáb. 9/27

3:30 am-8:00 pm

1 stop23h 30m

$662

LondonSingapore

LGW - SIN

LGWSIN

London Gatwick

mar. 11/25

6:40 pm-6:00 pm

1 stop15h 20m

Singapore Changi

dom. 12/28

12:05 am-5:50 pm

1 stop25h 45m

$663

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

dom. 9/14

10:20 am-6:25 pm

1 stop25h 05m

Singapore Changi

dom. 9/21

9:35 pm-10:10 pm

1 stop31h 35m

$664

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

lun. 11/3

4:40 pm-5:25 pm

1 stop16h 45m

Singapore Changi

lun. 12/8

11:55 pm-9:45 am

1 stop17h 50m

$665

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

sáb. 8/30

9:45 pm-9:40 am

1 stop28h 55m

Singapore Changi

mar. 9/16

9:10 pm-6:45 pm

1 stop28h 35m

$678

LondonSingapore

LGW - SIN

LGWSIN

London Gatwick

vie. 9/12

11:25 am-12:20 pm

1 stop17h 55m

Singapore Changi

sáb. 9/20

8:00 pm-6:55 am

1 stop17h 55m

$678

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 60 results
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Best time to book a flight from London to Southeast Asia

Have a flexible travel schedule? Discover the best time to fly to Southeast Asia from London 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 to Southeast Asia

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

Currently, September is the cheapest month in which you can book a flight from London to Southeast Asia (average of $946). Flying from London to Southeast Asia in December is currently the most expensive (average of $1,563). 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 LON to YJX?

Find hourly flight availability from London 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 julio 31, 2025.

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

Weekly flight availability from London to Southeast Asia

Explore weekly flight availability from London 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 julio 31, 2025.

The most flights from LON 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 julio 31, 2025.
Read through reviews of airlines operating flights from London to Southeast Asia, such as Singapore Airlines, Emirates, and KLM. 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
1,338 reviews

Overall

8.1

Boarding

8.2

Food

7.7

Entertainment

8.0

Comfort

7.9

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered
Singapore Airlines
8.1
Very good
1,338 reviews
Singapore Airlines
8.1
Very good
1,338 reviews

Overall

8.1

Boarding

8.2

Food

7.7

Entertainment

8.0

Comfort

7.9

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered
Emirates
8.1
Very good
3,300 reviews
Singapore Airlines
8.1
Very good
1,338 reviews

Overall

8.1

Boarding

8.2

Food

7.7

Entertainment

8.0

Comfort

7.9

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered
KLM
7.8
Good
1,383 reviews
Singapore Airlines
8.1
Very good
1,338 reviews

Overall

8.1

Boarding

8.2

Food

7.7

Entertainment

8.0

Comfort

7.9

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered
Austrian Airlines
7.6
Good
823 reviews
Singapore Airlines
8.1
Very good
1,338 reviews

Overall

8.1

Boarding

8.2

Food

7.7

Entertainment

8.0

Comfort

7.9

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered

Related info for your journey

Find useful and relevant information for your journey from London 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 to Southeast Asia one-way?

    To fly one-way, consider booking your trip with Turkmenistan Airlines, which is currently one of the cheapest options available, starting at $406. China Eastern flights start at $409 while deals on Norse Atlantic UK start at $410 one-way.

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

    When deciding which route to take from London to Southeast Asia consider London Heathrow - Bangkok Suvarnabhumi, London Gatwick - Bangkok Suvarnabhumi or London Heathrow - Langkawi as they are the most popular.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from London to Southeast Asia on time: EVA Air (85%), Thai Airways (82%), Air Canada (77%).

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

    On average you can expect to pay $2,705 for a flight from London to Southeast Asia. The cheapest flight overall is $550 while the most popular route, (London Heathrow - Bangkok Suvarnabhumi) is currently priced at $464.

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

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

  • How can I find direct flights from London to Southeast Asia?

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

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

    Yes. Cheapflights offers flight deals from London 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 to Southeast Asia?

    Currently, September is the cheapest month in which you can book a flight from London to Southeast Asia (average of $946). Flying from London to Southeast Asia in December is currently the most expensive (average of $1,563). 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

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Alternative routes for London to Southeast Asia

See prices for flight routes from nearby airports that may be better suited for you.
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Birmingham to Suvarnabhumi flights
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Heathrow to Karachi flights
Heathrow to Pu Dong flights

Top 10 airlines flying from London to Southeast Asia

Discover the top 10 airlines that operate flights from London 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 julio 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
Norse Atlantic UKCheapest$370Average$700FlexibilityNo cancel feeOn-timeN/A
SAUDIACheapest$407Average$816FlexibilityNo cancel feeOn-time86%
Shenzhen AirlinesCheapest$457Average$583FlexibilityNo cancel feeOn-time63%
Gulf AirCheapest$514Average$794FlexibilityNo cancel feeOn-time67%
China EasternCheapest$533Average$685FlexibilityNo cancel feeOn-time62%
China SouthernCheapest$540Average$712FlexibilityNo cancel feeOn-time69%
Hainan AirlinesCheapest$560Average$636FlexibilityNo cancel feeOn-time61%
Air IndiaCheapest$590Average$900FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$620Average$997FlexibilityNo cancel feeOn-time70%
Austrian AirlinesCheapest$673Average$1,152FlexibilityNo cancel feeOn-time78%

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