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Cheap flights from London to Southeast Asia from £305

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 22/10. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BKK
6 ago — 13 ago1
1 adult

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 1 agosto 2025.

Round-trip from

£498

One-way from

£305

Popular in

December

Cheapest in

May

Average price

£765
Hainan Airlines
  • Hainan Airlines
  • 15/9-21/9
  • 4 total stops
  • 68h 25m total
  • London to Southeast Asia
Search Deals
22/10
  • 22/10
  • 2 total stops
  • 28h 00m total
  • London to Southeast Asia
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£44 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£17 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2025
Search Deals

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 1 agosto 2025.

sex 10/1022:00LHR - SIN
2 stops30h 00mHainan Airlines
dom 19/1012:05SIN - LHR
2 stops38h 25mHainan Airlines
Deal found 1/8£498
sex 12/922:05LHR - SIN
1 stop30h 50mMultiple Airlines
qua 17/921:10SIN - LHR
1 stop22h 35mMultiple Airlines
Deal found 30/7£499
qua 17/908:55LHR - SIN
2 stops25h 10mSWISS
ter 30/923:20SIN - LHR
1 stop15h 35mSWISS
Deal found 31/7£499
sex 12/922:05LHR - SIN
1 stop35h 35mShenzhen Airlines
sáb 27/903:30SIN - LHR
1 stop23h 30mShenzhen Airlines
Deal found 1/8£500
ter 25/1118:40LGW - SIN
1 stop15h 20mSWISS
sex 26/1200:05SIN - LGW
1 stop25h 45mSWISS
Deal found 31/7£501
ter 19/810:00LHR - SIN
1 stop19h 20mGulf Air
ter 9/920:00SIN - LHR
1 stop17h 55mGulf Air
Deal found 30/7£502
qui 18/912:35LGW - SIN
1 stop26h 20mAir China
sáb 4/1017:30SIN - LGW
1 stop20h 25mAir China
Deal found 30/7£502
sex 12/910:55LGW - SIN
1 stop24h 00mTurkish Airlines
qua 17/923:10SIN - LGW
1 stop30h 10mTurkish Airlines
Deal found 31/7£504
sex 12/921:05LHR - SIN
1 stop38h 25mAir India
sáb 20/923:00SIN - LHR
1 stop39h 30mAir India
Deal found 30/7£505
sex 12/911:25LGW - SIN
1 stop17h 55mGulf Air
sáb 20/920:00SIN - LGW
1 stop17h 55mGulf Air
Deal found 30/7£505
sex 12/916:25LHR - SIN
1 stop17h 15mLufthansa
qui 18/923:40SIN - LHR
1 stop16h 00mLufthansa
Deal found 30/7£510
seg 8/921:50LGW - SIN
2 stops36h 30mMultiple Airlines
seg 22/903:10SIN - LGW
1 stop17h 15mMultiple Airlines
Deal found 31/7£510

Cheapflights Fare Finder

 
Customise 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 858,174 searches. Data last updated 1 agosto 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

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

sex 10/10

22:00-11:00

2 stops30h 00m

Singapore Changi

dom 19/10

12:05-19:30

2 stops38h 25m

£498

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

sex 12/9

22:05-11:55

1 stop30h 50m

Singapore Changi

qua 17/9

21:10-12:45

1 stop22h 35m

£499

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

qua 17/9

14:25-17:05

2 stops19h 40m

Singapore Changi

ter 7/10

23:20-11:25

1 stop19h 05m

£499

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

sex 12/9

22:05-16:40

1 stop35h 35m

Singapore Changi

sáb 27/9

03:30-20:00

1 stop23h 30m

£500

LondonSingapore

LGW - SIN

LGWSIN

London Gatwick

ter 25/11

18:40-18:00

1 stop15h 20m

Singapore Changi

sex 26/12

00:05-17:50

1 stop25h 45m

£501

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

ter 19/8

10:00-12:20

1 stop19h 20m

Singapore Changi

ter 9/9

20:00-06:55

1 stop17h 55m

£502

LondonSingapore

LGW - SIN

LGWSIN

London Gatwick

qui 18/9

12:35-21:55

1 stop26h 20m

Singapore Changi

sáb 4/10

17:30-06:55

1 stop20h 25m

£502

LondonSingapore

LGW - SIN

LGWSIN

London Gatwick

sex 12/9

10:55-17:55

1 stop24h 00m

Singapore Changi

qua 17/9

23:10-22:20

1 stop30h 10m

£504

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

sex 12/9

21:05-18:30

1 stop38h 25m

Singapore Changi

sáb 20/9

23:00-07:30

1 stop39h 30m

£505

LondonSingapore

LGW - SIN

LGWSIN

London Gatwick

sex 12/9

11:25-12:20

1 stop17h 55m

Singapore Changi

sáb 20/9

20:00-06:55

1 stop17h 55m

£505

Flights are sorted by cheapest return flights first.

Deals found on 31/7

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 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 to Southeast Asia

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

Currently, May is the cheapest month in which you can book a flight from London to Southeast Asia (average of £718). Flying from London to Southeast Asia in December is currently the most expensive (average of £1,123). 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 1 agosto 2025.

When flying from London 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 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 1 agosto 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 1 agosto 2025.
Check out reviews from past customers who have flown with Hainan Airlines, Singapore Airlines, andKLM from London to Southeast Asia to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Hainan Airlines
8.2
Very Good
43 reviews
Check prices

Food

8.4

Entertainment

7.4

Comfort

8.0

Boarding

8.5

Crew

8.8

Overall

8.2

Reviews

1 / 2
10.0
Excellent

Anonymous,Mar 2025

CAN - PEK

Excellent services. The staff were amazing. Although if there was something that I could suggest to improve the services I’d say that snacks and drinks should be offered in between meals. Other than that then it was a lovely flight.
Hainan Airlines
8.2
Very Good
43 reviews
Hainan Airlines
8.2
Very Good
43 reviews
Check prices

Food

8.4

Entertainment

7.4

Comfort

8.0

Boarding

8.5

Crew

8.8

Overall

8.2

Reviews

1 / 2
10.0
Excellent

Anonymous,Mar 2025

CAN - PEK

Excellent services. The staff were amazing. Although if there was something that I could suggest to improve the services I’d say that snacks and drinks should be offered in between meals. Other than that then it was a lovely flight.
Singapore Airlines
8.1
Very Good
1,338 reviews
Hainan Airlines
8.2
Very Good
43 reviews
Check prices

Food

8.4

Entertainment

7.4

Comfort

8.0

Boarding

8.5

Crew

8.8

Overall

8.2

Reviews

1 / 2
10.0
Excellent

Anonymous,Mar 2025

CAN - PEK

Excellent services. The staff were amazing. Although if there was something that I could suggest to improve the services I’d say that snacks and drinks should be offered in between meals. Other than that then it was a lovely flight.
KLM
7.8
Good
1,383 reviews
Hainan Airlines
8.2
Very Good
43 reviews
Check prices

Food

8.4

Entertainment

7.4

Comfort

8.0

Boarding

8.5

Crew

8.8

Overall

8.2

Reviews

1 / 2
10.0
Excellent

Anonymous,Mar 2025

CAN - PEK

Excellent services. The staff were amazing. Although if there was something that I could suggest to improve the services I’d say that snacks and drinks should be offered in between meals. Other than that then it was a lovely flight.
Austrian Airlines
7.6
Good
823 reviews
Hainan Airlines
8.2
Very Good
43 reviews
Check prices

Food

8.4

Entertainment

7.4

Comfort

8.0

Boarding

8.5

Crew

8.8

Overall

8.2

Reviews

1 / 2
10.0
Excellent

Anonymous,Mar 2025

CAN - PEK

Excellent services. The staff were amazing. Although if there was something that I could suggest to improve the services I’d say that snacks and drinks should be offered in between meals. Other than that then it was a lovely flight.

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?

    The cheapet airlines for a one-way flight from London to Southeast Asia are Turkmenistan Airlines (£305), China Southern (£306), and China Eastern (£308).

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

    The most popular route from London to Southeast Asia is London Heathrow - Bangkok Suvarnabhumi. You may also consider London Gatwick - Bangkok Suvarnabhumi or London City - Bangkok Suvarnabhumi.

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

    No one likes to see their flight delayed. When booking a flight from London to Southeast Asia consider choosing EVA Air (85%), Thai Airways (82%) or Air Canada (77%) as they are the most reliable in getting you off to your destination on time.

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

    The cheapest flight price from London to Southeast Asia is £437. On average you can expect to pay £2,743. The most popular route, (London Heathrow - Bangkok Suvarnabhumi), can usually be booked for £334.

  • 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 holiday 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, May is the cheapest month in which you can book a flight from London to Southeast Asia (average of £718). Flying from London to Southeast Asia in December is currently the most expensive (average of £1,123). 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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London City to Kuala Lumpur Intl flights
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Gatwick to New Delhi flights
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Heathrow to Ahmedabad flights
Stansted to Colombo flights
London City to Manila 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 858,174 searches. Data last updated 1 agosto 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkmenistan AirlinesCheapest£295Average£564FlexibilityNo cancel feeOn-time63%
Search Turkmenistan Airlines flights
Hainan AirlinesCheapest£383Average£460FlexibilityNo cancel feeOn-time61%
Search Hainan Airlines flights
KLMCheapest£423Average£844FlexibilityNo cancel feeOn-time75%
Search KLM flights
Norse Atlantic UKCheapest£427Average£570FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
Royal Brunei AirlinesCheapest£434Average£587FlexibilityNo cancel feeOn-time84%
Search Royal Brunei Airlines flights
Royal JordanianCheapest£482Average£653FlexibilityNo cancel feeOn-time61%
Search Royal Jordanian flights
SWISSCheapest£485Average£703FlexibilityNo cancel feeOn-time79%
Search SWISS flights
ITA AirwaysCheapest£501Average£624FlexibilityNo cancel feeOn-time81%
Search ITA Airways flights
A.P.G.Cheapest£512Average£592FlexibilityNo cancel feeOn-timeN/A
Search A.P.G. flights
Virgin AtlanticCheapest£551Average£668FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights

Fly with Cheapflights

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

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Millions of users choose and trust Cheapflights to book the best flight deals from London to Southeast Asia for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

Yes, we can. To see specific flights from London to Southeast Asia with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

Of course! You can now track prices for flights from London to Southeast Asia and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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