Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from London to Southeast Asia from £260

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 8/2. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BKK
4 Mar — 11 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to Southeast Asia

Enter your travel dates to find the best prices.

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 2 February 2026.

Tue 10/1110:30
LGW
-
BKK
2 stops29h 05m
China Eastern
Wed 25/1101:55
BKK
-
LGW
1 stop35h 35m
China Eastern
Deal found 1/2£399
Mon 18/522:40
LHR
-
BKK
1 stop19h 30m
Air China
Mon 15/619:35
BKK
-
LHR
1 stop30h 50m
Air China
Deal found 1/2£399
Tue 3/320:20
LGW
-
BKK
1 stop22h 30m
China Southern
Mon 9/303:00
BKK
-
LGW
1 stop21h 20m
China Southern
Deal found 1/2£399
Wed 29/422:00
LHR
-
BKK
1 stop30h 00m
Hainan Airlines
Thu 14/519:20
BKK
-
LHR
2 stops30h 10m
Hainan Airlines
Deal found 1/2£399
Fri 20/1110:30
LGW
-
BKK
3 stops26h 40m
China Eastern
Tue 24/1113:35
BKK
-
LGW
1 stop31h 25m
China Eastern
Deal found 31/1£400
Wed 22/422:00
LHR
-
BKK
1 stop30h 00m
Hainan Airlines
Thu 30/419:20
BKK
-
LHR
2 stops30h 10m
Hainan Airlines
Deal found 1/2£400
Fri 29/512:35
LGW
-
BKK
1 stop29h 30m
Air China
Thu 18/619:35
BKK
-
LGW
1 stop17h 00m
Air China
Deal found 31/1£401
Mon 2/317:40
LHR
-
BKK
1 stop17h 25m
Air China
Mon 16/301:30
BKK
-
LHR
1 stop21h 25m
Air China
Deal found 31/1£401
Thu 29/1014:45
LGW
-
BKK
2 stops34h 30m
Multiple Airlines
Thu 5/1116:25
BKK
-
LGW
Nonstop13h 00m
Multiple Airlines
Deal found 1/2£402
Sun 15/321:00
LHR
-
BKK
2 stops34h 55m
China Eastern
Mon 30/305:05
BKK
-
LHR
1 stop19h 35m
China Eastern
Deal found 1/2£402
Tue 28/418:00
LGW
-
BKK
2 stops36h 20m
China Eastern
Tue 9/615:55
BKK
-
LGW
2 stops29h 05m
China Eastern
Deal found 31/1£402
Thu 12/321:00
LHR
-
BKK
2 stops34h 05m
China Eastern
Sat 28/310:45
BKK
-
LHR
1 stop37h 55m
China Eastern
Deal found 31/1£402

Find 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 2 February 2026.

Round-trip from

£399

One-way from

£260

Popular in

July

Cheapest in

May

Average price

£607
China Southern
  • China Southern
  • 7/3-13/3
  • 2 total stops
  • 43h 50m total
  • London to Southeast Asia
Search Deals
SAUDIA
  • SAUDIA
  • 8/2
  • 1 total stop
  • 20h 40m total
  • London to Southeast Asia
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£59 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£14 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

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 2 February 2026.
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

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Tue 28/4

18:00-12:20

2 stops36h 20m

Bangkok Suvarnabhumi

Tue 9/6

15:55-15:00

2 stops29h 05m

£402

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Wed 11/3

17:00-17:50

1 stop17h 50m

Bangkok Suvarnabhumi

Sat 14/3

16:50-14:00

1 stop28h 10m

£413

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Wed 11/3

21:00-22:45

1 stop18h 45m

Phuket City

Wed 18/3

19:35-17:30

2 stops28h 55m

£417

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Tue 17/3

21:00-18:35

3 stops38h 35m

Phuket City

Sat 28/3

19:35-17:40

2 stops29h 05m

£422

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Mon 4/5

21:20-21:55

1 stop18h 35m

Bangkok Suvarnabhumi

Sun 10/5

21:55-18:40

1 stop26h 45m

£422

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Tue 5/5

21:20-00:40

1 stop21h 20m

Bangkok Suvarnabhumi

Fri 15/5

02:10-18:40

1 stop22h 30m

£422

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sat 7/3

21:10-18:30

1 stop38h 20m

Bangkok Suvarnabhumi

Sat 2/5

19:30-20:00

1 stop30h 30m

£453

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Wed 4/3

21:10-02:15

1 stop22h 05m

Bangkok Suvarnabhumi

Thu 30/4

19:30-20:00

1 stop30h 30m

£453

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Mon 27/4

22:05-18:30

1 stop38h 25m

Bangkok Suvarnabhumi

Tue 26/5

03:15-20:00

1 stop22h 45m

£464

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Fri 22/5

22:05-11:10

1 stop31h 05m

Bangkok Suvarnabhumi

Fri 12/6

19:30-19:50

1 stop30h 20m

£464

Flights are sorted by cheapest return flights first.

Deals found on 31/1

Showing 1-10 of 60 results
1
2
3
...
6

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, November is the cheapest month in which you can book a flight from London to Southeast Asia (average of £319). Flying from London to Southeast Asia in July is currently the most expensive (average of £490). 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 2 February 2026.

When flying from London to Southeast Asia, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 49% versus a flight in the evening.

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 2 February 2026.

The most flights from LON to zzYJX are scheduled on a Tuesday (10 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (8 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 2 February 2026.
Check out reviews from past customers who have flown with Singapore Airlines, Cathay Pacific, andQatar Airways 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.
Singapore Airlines
8.2
Very Good
1,443 reviews
Check prices

Boarding

8.3

Food

7.8

Comfort

8.0

Crew

8.6

Overall

8.2

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.
Singapore Airlines
8.2
Very Good
1,443 reviews
Singapore Airlines
8.2
Very Good
1,443 reviews
Check prices

Boarding

8.3

Food

7.8

Comfort

8.0

Crew

8.6

Overall

8.2

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.
Cathay Pacific
7.6
Good
1,153 reviews
Singapore Airlines
8.2
Very Good
1,443 reviews
Check prices

Boarding

8.3

Food

7.8

Comfort

8.0

Crew

8.6

Overall

8.2

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.
Qatar Airways
7.4
Good
3,729 reviews
Singapore Airlines
8.2
Very Good
1,443 reviews
Check prices

Boarding

8.3

Food

7.8

Comfort

8.0

Crew

8.6

Overall

8.2

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.
Etihad Airways
7.3
Good
1,379 reviews
Singapore Airlines
8.2
Very Good
1,443 reviews
Check prices

Boarding

8.3

Food

7.8

Comfort

8.0

Crew

8.6

Overall

8.2

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.
Air China
7.2
Good
138 reviews
Singapore Airlines
8.2
Very Good
1,443 reviews
Check prices

Boarding

8.3

Food

7.8

Comfort

8.0

Crew

8.6

Overall

8.2

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.

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.

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

    Airlines like China Eastern, Shenzhen Airlines, and Gulf Air fly from London to Southeast Asia in about 19h 20m. The time it takes to get you to your destination can typically vary by up to 19h. The distance from London to Southeast Asia is about 6757 mi. Both multi-stop and direct flights can be found to your destination and back.

  • 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 Shenzhen Airlines (£178), Air China (£218), and SAUDIA (£224).

  • 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 Stansted - 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 (80%), Thai Airways (79%) or Air Canada (76%) 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 £446. On average you can expect to pay £2,276. The most popular route, (London Heathrow - Bangkok Suvarnabhumi), can usually be booked for £366.

  • 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, November is the cheapest month in which you can book a flight from London to Southeast Asia (average of £319). Flying from London to Southeast Asia in July is currently the most expensive (average of £490). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for London 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 Haneda flights
Stansted to Suvarnabhumi flights
London City to Suvarnabhumi flights
Heathrow to Narita flights
Gatwick to Haneda flights
Gatwick to Narita flights
Heathrow to New Delhi flights
Heathrow to Hong Kong flights
Stansted to Narita flights
Heathrow to Colombo flights
London City to Haneda flights
London City to Narita flights
Heathrow to Kuala Lumpur Intl flights
Heathrow to Manila flights
Heathrow to Don Mueang Intl flights
Stansted to Haneda flights
Heathrow to Mumbai flights
Manchester to Suvarnabhumi flights
Luton to Suvarnabhumi flights
Manchester to Islamabad flights
Heathrow to Incheon Intl flights
Heathrow to Islamabad flights
Heathrow to Lahore flights
Heathrow to Hongqiao Intl flights
Heathrow to Singapore flights
Gatwick to Manila flights
Heathrow to Phuket City flights
Stansted to New Delhi flights
Gatwick to New Delhi flights
Heathrow to Taiwan Taoyuan Intl flights
London City to Manila flights
Stansted to Manila flights
Gatwick to Colombo flights
Stansted to Colombo flights
Luton to Narita flights
Gatwick to Phuket City flights
Heathrow to Denpasar flights
Gatwick to Singapore flights
Gatwick to Hong Kong flights
Gatwick to Kuala Lumpur Intl flights
Gatwick to Lahore flights
Gatwick to Islamabad flights
Heathrow to Hanoi flights
Birmingham to Suvarnabhumi flights
Heathrow to Pu Dong flights
London City to Hong Kong flights
Stansted to Hong Kong flights
Stansted to Islamabad 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 2 February 2026.
AirlineCheapestAverageFlexibilityOn-time
Turkmenistan AirlinesCheapest£264Average£530FlexibilityNo cancel feeOn-time63%
Search Turkmenistan Airlines flights
Hahn AirCheapest£269Average£642FlexibilityNo cancel feeOn-timeN/A
Search Hahn Air flights
Scandinavian AirlinesCheapest£278Average£673FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
China AirlinesCheapest£333Average£697FlexibilityNo cancel feeOn-time70%
Search China Airlines flights
Air ArabiaCheapest£342Average£601FlexibilityNo cancel feeOn-time79%
Search Air Arabia flights
Hainan AirlinesCheapest£345Average£426FlexibilityNo cancel feeOn-time61%
Search Hainan Airlines flights
ITA AirwaysCheapest£359Average£541FlexibilityNo cancel feeOn-time81%
Search ITA Airways flights
KLMCheapest£362Average£800FlexibilityNo cancel feeOn-time75%
Search KLM flights
Royal JordanianCheapest£407Average£675FlexibilityNo cancel feeOn-time61%
Search Royal Jordanian flights
Royal Brunei AirlinesCheapest£419Average£567FlexibilityNo cancel feeOn-time84%
Search Royal Brunei Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Southeast Asia from London today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from London to Southeast Asia?

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.