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Cheap flights from London to Southeast Asia from £301

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 7/11. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BKK
30 Nov — 7 Dec1
1 adult
1 adult, Economy, 0 bags

Find 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 31 October 2025.

Thu 6/1121:35LHR - MNL
1 stop19h 50mAir China
Sat 15/1106:20MNL - LHR
1 stop17h 35mAir China
Deal found 28/10£455
Sun 30/1111:05LGW - BKK
1 stop31h 25mAir China
Sun 14/1202:30BKK - LGW
1 stop35h 25mAir China
Deal found 29/10£455
Wed 3/1220:25LHR - BKK
1 stop20h 45mAir China
Wed 14/117:55BKK - LHR
1 stop32h 45mAir China
Deal found 29/10£455
Thu 13/1108:05STN - BKK
1 stop19h 05mMultiple Airlines
Wed 19/1104:35BKK - STN
1 stop23h 00mMultiple Airlines
Deal found 29/10£455
Sat 22/1120:25LHR - MNL
1 stop19h 40mAir China
Fri 26/1206:20MNL - LHR
1 stop19h 30mAir China
Deal found 28/10£456
Wed 3/1210:30LGW - BKK
1 stop18h 50mChina Eastern
Sun 14/1219:05BKK - LGW
1 stop25h 55mChina Eastern
Deal found 29/10£456
Wed 12/1117:15LHR - BKK
2 stops24h 50mChina Southern
Fri 21/1108:20BKK - LHR
1 stop17h 15mChina Southern
Deal found 29/10£456
Thu 20/1106:15STN - BKK
2 stops28h 50mMultiple Airlines
Fri 5/1219:30BKK - STN
2 stops32h 15mMultiple Airlines
Deal found 29/10£456
Mon 10/1120:25LHR - MNL
1 stop19h 40mAir China
Mon 9/202:55MNL - LHR
1 stop25h 20mAir China
Deal found 30/10£457
Sun 16/1110:30LGW - BKK
1 stop22h 25mChina Eastern
Sat 6/1201:55BKK - LGW
1 stop19h 05mChina Eastern
Deal found 29/10£457
Tue 2/1220:25LHR - BKK
1 stop20h 45mAir China
Thu 11/1201:30BKK - LHR
1 stop21h 25mAir China
Deal found 30/10£457
Mon 10/1122:00LHR - MNL
1 stop34h 50mChina Southern
Mon 22/1212:00MNL - LHR
1 stop38h 35mChina Southern
Deal found 30/10£458

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 31 October 2025.

Round-trip from

£455

One-way from

£301

Popular in

December

Cheapest in

May

Average price

£585
Air China
  • Air China
  • 1/2-13/2
  • 2 total stops
  • 47h 10m total
  • London to Southeast Asia
Search Deals
Gulf Air
  • Gulf Air
  • 7/11
  • 1 total stop
  • 17h 55m total
  • London to Southeast Asia
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£49 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 October 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 31 October 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

Thu 19/3

16:40-17:25

1 stop16h 45m

Singapore Changi

Mon 23/3

23:55-09:45

1 stop17h 50m

£461

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sun 15/3

21:10-02:15

1 stop22h 05m

Bangkok Suvarnabhumi

Thu 19/3

12:10-19:10

1 stop38h 00m

£484

LondonBangkok

LTN - BKK

LTNBKK

London Luton

Sun 30/11

14:30-08:15

2 stops34h 45m

Bangkok Suvarnabhumi

Tue 9/12

10:50-23:10

2 stops43h 20m

£491

LondonBangkok

LTN - BKK

LTNBKK

London Luton

Sun 1/3

14:00-15:05

1 stop18h 05m

Bangkok Suvarnabhumi

Sun 15/3

22:05-23:10

2 stops32h 05m

£493

LondonSingapore

LGW - SIN

LGWSIN

London Gatwick

Thu 19/3

18:40-18:00

1 stop15h 20m

Singapore Changi

Sun 22/3

00:05-17:50

1 stop25h 45m

£495

LondonBangkok

LTN - BKK

LTNBKK

London Luton

Sun 18/1

14:00-21:05

2 stops48h 05m

Bangkok Suvarnabhumi

Sun 1/3

22:05-23:10

2 stops32h 05m

£501

LondonBangkok

LTN - BKK

LTNBKK

London Luton

Sun 25/1

09:15-00:10

2 stops31h 55m

Bangkok Suvarnabhumi

Sat 31/1

19:30-20:55

2 stops32h 25m

£502

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Thu 4/12

20:05-18:00

1 stop37h 55m

Singapore Changi

Sun 7/12

00:05-13:40

2 stops21h 35m

£511

LondonSingapore

LGW - SIN

LGWSIN

London Gatwick

Wed 15/4

11:25-12:20

1 stop17h 55m

Singapore Changi

Sat 25/4

20:00-06:55

1 stop17h 55m

£514

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Tue 25/11

20:05-18:00

1 stop37h 55m

Singapore Changi

Tue 9/12

00:05-13:40

2 stops21h 35m

£520

Flights are sorted by cheapest return flights first.

Deals found on 31/10

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 £342). Flying from London to Southeast Asia in July is currently the most expensive (average of £531). 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 31 October 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 31 October 2025.

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 31 October 2025.
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
8.1
Very Good
1,388 reviews
Check prices

Food

7.7

Crew

8.6

Comfort

8.0

Overall

8.1

Boarding

8.3

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
8.1
Very Good
1,388 reviews
Singapore Airlines
8.1
Very Good
1,388 reviews
Check prices

Food

7.7

Crew

8.6

Comfort

8.0

Overall

8.1

Boarding

8.3

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
1,044 reviews
Singapore Airlines
8.1
Very Good
1,388 reviews
Check prices

Food

7.7

Crew

8.6

Comfort

8.0

Overall

8.1

Boarding

8.3

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
3,661 reviews
Singapore Airlines
8.1
Very Good
1,388 reviews
Check prices

Food

7.7

Crew

8.6

Comfort

8.0

Overall

8.1

Boarding

8.3

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.
China Southern
7.4
Good
117 reviews
Singapore Airlines
8.1
Very Good
1,388 reviews
Check prices

Food

7.7

Crew

8.6

Comfort

8.0

Overall

8.1

Boarding

8.3

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
7.1
Good
119 reviews
Singapore Airlines
8.1
Very Good
1,388 reviews
Check prices

Food

7.7

Crew

8.6

Comfort

8.0

Overall

8.1

Boarding

8.3

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 Lufthansa, Shenzhen Airlines, and SWISS fly from London to Southeast Asia in about 15h 20m. The time it takes to get you to your destination can typically vary by up to 6h 45m. The distance from London to Southeast Asia is about 6750 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 Air China (£304), Shenzhen Airlines (£306), and Gulf Air (£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 (77%), Thai Airways (74%) or Air Canada (69%) 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 £460. On average you can expect to pay £2,417. The most popular route, (London Heathrow - Bangkok Suvarnabhumi), can usually be booked for £369.

  • 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 £342). Flying from London to Southeast Asia in July is currently the most expensive (average of £531). 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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Stansted to Manila flights
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London City to New Delhi flights
Heathrow to Hyderabad flights
Stansted to Colombo flights
Gatwick to Islamabad flights
Birmingham to Suvarnabhumi flights
Heathrow to Bangalore flights
Stansted to Mumbai flights
Gatwick to Mumbai flights
Heathrow to Ahmedabad flights
London City to Manila flights
Stansted to Islamabad flights
Stansted to Kuala Lumpur Intl flights
London City to Kuala Lumpur Intl flights
Gatwick to Phuket City flights
Gatwick to Hong Kong flights
Heathrow to Chennai flights
Heathrow to Malé 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 31 October 2025.
AirlineCheapestAverageFlexibilityOn-time
Hahn AirCheapest£279Average£589FlexibilityNo cancel feeOn-timeN/A
Search Hahn Air flights
Turkmenistan AirlinesCheapest£296Average£567FlexibilityNo cancel feeOn-time63%
Search Turkmenistan Airlines flights
KLMCheapest£376Average£833FlexibilityNo cancel feeOn-time75%
Search KLM flights
Hainan AirlinesCheapest£384Average£446FlexibilityNo cancel feeOn-time61%
Search Hainan Airlines flights
Norse Atlantic UKCheapest£419Average£560FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
Royal Brunei AirlinesCheapest£435Average£583FlexibilityNo cancel feeOn-time84%
Search Royal Brunei Airlines flights
SWISSCheapest£440Average£702FlexibilityNo cancel feeOn-time79%
Search SWISS flights
A.P.G.Cheapest£476Average£599FlexibilityNo cancel feeOn-timeN/A
Search A.P.G. flights
Royal JordanianCheapest£494Average£698FlexibilityNo cancel feeOn-time61%
Search Royal Jordanian flights
ITA AirwaysCheapest£503Average£627FlexibilityNo cancel feeOn-time81%
Search ITA Airways flights

Fly with Cheapflights

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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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