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Cheap flights from London to Southeast Asia from £275

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 9/6. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BKK
5 May — 12 May1
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 30 April 2025.

Round-trip from

£409

One-way from

£275

Popular in

December

Cheapest in

May

Average price

£686
China Eastern
  • China Eastern
  • 12/5-20/5
  • 2 total stops
  • 43h 50m total
  • London to Southeast Asia
Search Deals
9/6
  • 9/6
  • 2 total stops
  • 33h 05m total
  • London to Southeast Asia
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£42 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 April 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 30 April 2025.

Thu 8/521:20LHR - BKK
1 stop18h 35mChina Eastern
Wed 21/520:50BKK - LHR
2 stops27h 50mChina Eastern
Deal found 29/4£409
Sun 25/522:05LHR - MNL
1 stop20h 35mShenzhen Airlines
Thu 5/602:55MNL - LHR
1 stop24h 05mShenzhen Airlines
Deal found 29/4£410
Fri 6/618:40LGW - BKK
1 stop24h 00mChina Eastern
Thu 12/602:10BKK - LGW
1 stop19h 00mChina Eastern
Deal found 29/4£410
Fri 2/522:00LHR - BKK
2 stops30h 00mHainan Airlines
Tue 9/901:30BKK - LHR
1 stop24h 00mHainan Airlines
Deal found 29/4£410
Fri 30/515:20STN - BKK
2 stops34h 50mMultiple Airlines
Wed 11/621:55BKK - STN
3 stops32h 00mMultiple Airlines
Deal found 29/4£410
Tue 10/612:35LGW - BKK
1 stop29h 35mAir China
Wed 25/619:35BKK - LGW
1 stop17h 00mAir China
Deal found 29/4£411
Wed 28/521:20LHR - MNL
1 stop21h 00mChina Eastern
Wed 18/603:55MNL - LHR
1 stop21h 45mChina Eastern
Deal found 29/4£412
Fri 17/1012:30LHR - BKK
Nonstop11h 30mThai Airways
Mon 20/1000:30BKK - LHR
Nonstop12h 45mThai Airways
Deal found 29/4£412
Sat 8/1122:00LHR - MNL
1 stop16h 30mChina Southern
Mon 24/1112:00MNL - LHR
1 stop38h 15mChina Southern
Deal found 29/4£417
Tue 27/520:25LHR - MNL
1 stop20h 55mAir China
Mon 2/602:55MNL - LHR
1 stop24h 20mAir China
Deal found 29/4£418
Fri 17/1008:40LCY - BKK
1 stop18h 50mKLM
Tue 21/1012:05BKK - LCY
1 stop25h 10mKLM
Deal found 29/4£418
Sat 1/1121:10LHR - BKK
1 stop31h 00mShenzhen Airlines
Sat 22/1119:30BKK - LHR
1 stop30h 40mShenzhen Airlines
Deal found 29/4£418

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 30 April 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

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Mon 12/5

18:05-18:05

1 stop18h 00m

Bangkok Suvarnabhumi

Tue 20/5

19:10-15:00

1 stop25h 50m

£409

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Mon 19/5

21:20-20:55

1 stop17h 35m

Bangkok Suvarnabhumi

Thu 5/6

20:50-18:40

2 stops27h 50m

£409

LondonManila

LHR - MNL

LHRMNL

London Heathrow

Sun 25/5

22:05-01:40

1 stop20h 35m

Manila Ninoy Aquino Intl

Thu 5/6

02:55-20:00

1 stop24h 05m

£410

LondonBangkok

STN - BKK

STNBKK

London Stansted

Fri 30/5

15:20-08:10

2 stops34h 50m

Bangkok Suvarnabhumi

Wed 11/6

21:55-23:55

3 stops32h 00m

£410

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Tue 10/6

12:35-00:10

1 stop29h 35m

Bangkok Suvarnabhumi

Wed 25/6

19:35-06:35

1 stop17h 00m

£411

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Mon 12/5

22:00-10:00

2 stops30h 00m

Bangkok Suvarnabhumi

Thu 22/5

19:20-19:30

2 stops30h 10m

£411

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Fri 17/10

21:25-15:00

Nonstop11h 35m

Bangkok Suvarnabhumi

Tue 21/10

12:50-19:10

Nonstop12h 20m

£412

LondonBangkok

LCY - BKK

LCYBKK

London City

Fri 17/10

08:40-09:30

1 stop18h 50m

Bangkok Suvarnabhumi

Tue 21/10

12:05-07:15

1 stop25h 10m

£418

LondonManila

LHR - MNL

LHRMNL

London Heathrow

Tue 27/5

20:25-00:20

1 stop20h 55m

Manila Ninoy Aquino Intl

Mon 2/6

02:55-20:15

1 stop24h 20m

£418

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sat 31/5

22:05-02:15

1 stop22h 10m

Bangkok Suvarnabhumi

Tue 24/6

03:15-20:00

1 stop22h 45m

£418

Flights are sorted by cheapest return flights first.

Deals found on 29/4

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 £717). 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 30 April 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 30 April 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).

Rainfall in Southeast Asia by month

Plan your trip to Southeast Asia by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Southeast Asia ranges from 10.0 - 320.0 inches per month. September is typically the wettest month, when rainfall can reach 320.0 mm. January is typically the driest time to visit Southeast Asia when rainfall is around 10.0 mm.

Temperature in Southeast Asia by month

Plan your trip to Southeast Asia by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Southeast Asia, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 30.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 26.0 C).

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 30 April 2025.
See what other customers who have flown with Hainan Airlines, Singapore Airlines and Air New Zealand from London to Southeast Asia have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Hainan Airlines
8.1
Very Good
38 reviews
Check prices

Food

8.5

Boarding

8.6

Crew

9.0

Comfort

8.1

Overall

8.1

Entertainment

7.7

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
8.1
Very Good
38 reviews
Hainan Airlines
8.1
Very Good
38 reviews
Check prices

Food

8.5

Boarding

8.6

Crew

9.0

Comfort

8.1

Overall

8.1

Entertainment

7.7

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
1,292 reviews
Hainan Airlines
8.1
Very Good
38 reviews
Check prices

Food

8.5

Boarding

8.6

Crew

9.0

Comfort

8.1

Overall

8.1

Entertainment

7.7

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.
Air New Zealand
8.0
Very Good
472 reviews
Hainan Airlines
8.1
Very Good
38 reviews
Check prices

Food

8.5

Boarding

8.6

Crew

9.0

Comfort

8.1

Overall

8.1

Entertainment

7.7

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.
Emirates
8.0
Very Good
3,215 reviews
Hainan Airlines
8.1
Very Good
38 reviews
Check prices

Food

8.5

Boarding

8.6

Crew

9.0

Comfort

8.1

Overall

8.1

Entertainment

7.7

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 Hainan Airlines (£275), Air China (£280), and China Eastern (£280).

  • 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 Thai Airways (69%), Air Canada (68%) or EVA Air (62%) 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 £356. On average you can expect to pay £2,554. The most popular route, (London Heathrow - Bangkok Suvarnabhumi), can usually be booked for £381.

  • 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 £717). 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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Heathrow to Islamabad flights
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Manchester to Islamabad flights
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Gatwick to Manila flights
Gatwick to Colombo flights
Heathrow to Hongqiao Intl flights
Stansted to Denpasar flights
London City to Denpasar flights
Stansted to Colombo flights
Heathrow to Dhaka flights
Birmingham to Suvarnabhumi flights
Stansted to Manila flights
Heathrow to Chennai flights
Heathrow to Bangalore flights
Heathrow to Lahore flights
Gatwick to New Delhi flights
London City to Manila flights
Heathrow to Kathmandu flights
Gatwick to Incheon Intl flights
Gatwick to Islamabad flights
London City to Hong Kong 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 30 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkmenistan AirlinesCheapest£291Average£540FlexibilityNo cancel feeOn-time63%
Search Turkmenistan Airlines flights
Norse Atlantic UKCheapest£312Average£567FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
Hainan AirlinesCheapest£403Average£474FlexibilityNo cancel feeOn-time61%
Search Hainan Airlines flights
Royal Brunei AirlinesCheapest£428Average£595FlexibilityNo cancel feeOn-time84%
Search Royal Brunei Airlines flights
Royal JordanianCheapest£460Average£626FlexibilityNo cancel feeOn-time61%
Search Royal Jordanian flights
LufthansaCheapest£487Average£739FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
ITA AirwaysCheapest£495Average£577FlexibilityNo cancel feeOn-time81%
Search ITA Airways flights
Virgin AtlanticCheapest£526Average£659FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Qantas AirwaysCheapest£551Average£702FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
China AirlinesCheapest£562Average£715FlexibilityNo cancel feeOn-time70%
Search China Airlines 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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