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Cheap flights from London to Southeast Asia from £292

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 3/2. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BKK
16 Jan — 23 Jan1
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 17 December 2025.

Sun 28/1221:15LHR - BKK
1 stop29h 50mHainan Airlines
Tue 20/111:10BKK - LHR
1 stop36h 10mHainan Airlines
Deal found 16/12£446
Wed 31/1210:30LGW - BKK
1 stop18h 50mChina Eastern
Mon 19/101:55BKK - LGW
1 stop19h 05mChina Eastern
Deal found 16/12£453
Wed 31/1219:45LHR - BKK
1 stop31h 20mHainan Airlines
Tue 20/111:10BKK - LHR
1 stop36h 10mHainan Airlines
Deal found 15/12£454
Sun 28/1221:15LHR - BKK
1 stop29h 50mHainan Airlines
Sun 25/111:10BKK - LHR
2 stops37h 45mHainan Airlines
Deal found 16/12£460
Sun 28/1221:15LHR - BKK
1 stop29h 50mHainan Airlines
Thu 22/111:10BKK - LHR
2 stops37h 25mHainan Airlines
Deal found 15/12£466
Tue 30/1210:30LGW - BKK
1 stop24h 55mChina Eastern
Wed 28/113:35BKK - LGW
1 stop23h 55mChina Eastern
Deal found 16/12£469
Wed 31/1210:30LGW - BKK
1 stop18h 50mChina Eastern
Fri 6/219:55BKK - LGW
1 stop25h 05mChina Eastern
Deal found 16/12£469
Mon 29/1211:05LGW - BKK
1 stop31h 25mAir China
Tue 13/102:30BKK - LGW
1 stop35h 25mAir China
Deal found 16/12£472
Wed 31/1210:30LGW - BKK
1 stop18h 50mChina Eastern
Sun 8/201:55BKK - LGW
1 stop19h 05mChina Eastern
Deal found 16/12£488
Wed 31/1210:30LGW - BKK
1 stop18h 50mMultiple Airlines
Fri 6/204:20BKK - LGW
1 stop16h 50mMultiple Airlines
Deal found 16/12£491
Wed 31/1210:30LGW - BKK
1 stop18h 50mMultiple Airlines
Fri 27/204:20BKK - LGW
1 stop16h 50mMultiple Airlines
Deal found 16/12£499
Wed 31/1210:30LGW - BKK
1 stop18h 50mMultiple Airlines
Sun 1/322:05BKK - LGW
2 stops31h 10mMultiple Airlines
Deal found 16/12£510

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 17 December 2025.

Round-trip from

£439

One-way from

£292

Popular in

December

Cheapest in

May

Average price

£850
Air China
  • Air China
  • 5/2-2/3
  • 2 total stops
  • 40h 45m total
  • London to Southeast Asia
Search Deals
3/2
  • 3/2
  • 3 total stops
  • 41h 05m total
  • London to Southeast Asia
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£40 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£15 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
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 17 December 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

Sat 17/1

16:40-17:25

1 stop16h 45m

Singapore Changi

Tue 27/1

23:45-08:05

1 stop16h 20m

£492

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Thu 29/1

17:50-17:25

1 stop15h 35m

Singapore Changi

Wed 4/2

00:05-11:15

1 stop19h 10m

£506

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Thu 12/3

08:40-13:05

1 stop21h 25m

Bangkok Suvarnabhumi

Sun 29/3

22:35-05:55

Nonstop13h 20m

£510

LondonKuala Lumpur

LHR - KUL

LHRKUL

London Heathrow

Thu 22/1

17:05-18:45

2 stops17h 40m

Kuala Lumpur Intl

Mon 26/1

23:50-09:00

1 stop17h 10m

£522

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Mon 25/5

22:05-16:40

1 stop35h 35m

Singapore Changi

Sat 6/6

13:20-20:00

1 stop37h 40m

£523

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Wed 27/5

22:05-12:10

1 stop31h 05m

Singapore Changi

Sun 7/6

13:20-19:50

1 stop37h 30m

£523

LondonKuala Lumpur

LHR - KUL

LHRKUL

London Heathrow

Thu 15/1

13:55-19:35

1 stop21h 40m

Kuala Lumpur Intl

Mon 26/1

09:35-14:30

1 stop36h 55m

£526

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Sun 25/1

21:15-16:05

Nonstop11h 50m

Bangkok Suvarnabhumi

Wed 18/2

09:05-05:55

1 stop27h 50m

£526

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Wed 11/2

09:30-12:30

1 stop19h 00m

Singapore Changi

Sun 15/2

20:00-06:35

1 stop18h 35m

£536

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Thu 22/1

21:50-12:30

1 stop30h 40m

Singapore Changi

Mon 26/1

20:00-06:35

1 stop18h 35m

£537

Flights are sorted by cheapest return flights first.

Deals found on 16/12

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 £334). Flying from London to Southeast Asia in July is currently the most expensive (average of £513). 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 17 December 2025.

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 15% versus a flight at midday.

What is the cheapest day to fly from London to Southeast Asia?

Use this chart to determine the cheapest time to fly return from London to Southeast Asia. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their London to Southeast Asia flight should consider departing on Saturday afternoons when fares are most often at their lowest. Saturday at midday flights should be avoided if possible as fares are typically the most expensive at this time.

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 17 December 2025.

The most flights from LON to zzYJX are scheduled on a Monday (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 17 December 2025.
Check out reviews from past customers who have flown with Singapore Airlines, Cathay Pacific, andChina Southern 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
8.1
Very Good
1,413 reviews
Check prices

Boarding

8.3

Entertainment

8.0

Crew

8.6

Food

7.8

Comfort

8.0

Overall

8.1

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
8.1
Very Good
1,413 reviews
Singapore Airlines
8.1
Very Good
1,413 reviews
Check prices

Boarding

8.3

Entertainment

8.0

Crew

8.6

Food

7.8

Comfort

8.0

Overall

8.1

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
1,095 reviews
Singapore Airlines
8.1
Very Good
1,413 reviews
Check prices

Boarding

8.3

Entertainment

8.0

Crew

8.6

Food

7.8

Comfort

8.0

Overall

8.1

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.
China Southern
7.5
Good
122 reviews
Singapore Airlines
8.1
Very Good
1,413 reviews
Check prices

Boarding

8.3

Entertainment

8.0

Crew

8.6

Food

7.8

Comfort

8.0

Overall

8.1

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
3,683 reviews
Singapore Airlines
8.1
Very Good
1,413 reviews
Check prices

Boarding

8.3

Entertainment

8.0

Crew

8.6

Food

7.8

Comfort

8.0

Overall

8.1

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
7.1
Good
129 reviews
Singapore Airlines
8.1
Very Good
1,413 reviews
Check prices

Boarding

8.3

Entertainment

8.0

Crew

8.6

Food

7.8

Comfort

8.0

Overall

8.1

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 Lufthansa, British Airways, and KLM fly from London to Southeast Asia in about 16h 45m. The time it takes to get you to your destination can typically vary by up to 4h 40m. 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 (£183), China Eastern (£206), and Air China (£223).

  • 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 (88%), Thai Airways (84%) or Air Canada (80%) 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 £466. On average you can expect to pay £2,341. The most popular route, (London Heathrow - Bangkok Suvarnabhumi), can usually be booked for £360.

  • 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 £334). Flying from London to Southeast Asia in July is currently the most expensive (average of £513). 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.
Heathrow to Suvarnabhumi flights
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London City to Manila flights
Gatwick to Kuala Lumpur Intl flights
Stansted to Colombo flights
Gatwick to Singapore flights
Gatwick to Colombo flights
Heathrow to Hyderabad flights
Stansted to Islamabad flights
Stansted to Kuala Lumpur Intl flights
Heathrow to Taiwan Taoyuan Intl flights
London City to Kuala Lumpur Intl flights
Gatwick to Islamabad flights
Heathrow to Hanoi flights
Heathrow to Denpasar flights
Heathrow to Malé flights
Heathrow to Dhaka flights
Heathrow to Ahmedabad 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 17 December 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkmenistan AirlinesCheapest£291Average£557FlexibilityNo cancel feeOn-time63%
Search Turkmenistan Airlines flights
Hainan AirlinesCheapest£363Average£438FlexibilityNo cancel feeOn-time61%
Search Hainan Airlines flights
KLMCheapest£370Average£837FlexibilityNo cancel feeOn-time75%
Search KLM flights
Royal Brunei AirlinesCheapest£428Average£571FlexibilityNo cancel feeOn-time84%
Search Royal Brunei Airlines flights
Hahn AirCheapest£438Average£646FlexibilityNo cancel feeOn-timeN/A
Search Hahn Air flights
FinnairCheapest£453Average£787FlexibilityNo cancel feeOn-time76%
Search Finnair flights
A.P.G.Cheapest£481Average£605FlexibilityNo cancel feeOn-timeN/A
Search A.P.G. flights
TUI AirwaysCheapest£483Average£850FlexibilityNo cancel feeOn-timeN/A
Search TUI Airways flights
ITA AirwaysCheapest£495Average£586FlexibilityNo cancel feeOn-time81%
Search ITA Airways flights
Royal JordanianCheapest£507Average£689FlexibilityNo cancel feeOn-time61%
Search Royal Jordanian 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.

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