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Cheap flights from London to Southeast Asia from $639

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 24/3. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BKK
16 Mar — 23 Mar1
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 11 March 2025.

Round-trip from

$958

One-way from

$657

Popular in

December

Cheapest in

May

Average price

$1,312
Air China
  • Air China
  • 25/5-31/5
  • 2 total stops
  • 50h 25m total
  • London to Southeast Asia
Search Deals
25/3
  • 25/3
  • 1 total stop
  • 19h 30m total
  • London to Southeast Asia
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($167 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($72 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2025
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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 11 March 2025.

Sun 25/522:40LHR - BKK
1 stop19h 30mAir China
Sat 31/519:35BKK - LHR
1 stop30h 55mAir China
Deal found 9/3$958
Mon 5/510:00LHR - BKK
1 stop21h 45mSAUDIA
Tue 13/515:25BKK - LHR
1 stop22h 05mSAUDIA
Deal found 11/3$986
Sun 16/321:10LHR - BKK
1 stop38h 20mShenzhen Airlines
Sat 29/319:30BKK - LHR
1 stop30h 30mShenzhen Airlines
Deal found 10/3$1,042
Wed 30/408:40LHR - BKK
1 stop18h 50mMultiple Airlines
Wed 11/611:35BKK - LHR
1 stop15h 50mMultiple Airlines
Deal found 10/3$1,099
Wed 10/909:30LHR - BKK
1 stop38h 00mFinnair
Tue 30/907:05BKK - LHR
1 stop35h 05mFinnair
Deal found 10/3$1,132
Sun 6/415:10LTN - KUL
2 stops31h 50mMultiple Airlines
Sat 12/422:30KUL - LTN
2 stops31h 55mMultiple Airlines
Deal found 10/3$1,137
Tue 23/909:55LHR - BKK
2 stops17h 20mKLM
Wed 12/1112:15BKK - LHR
1 stop15h 35mKLM
Deal found 10/3$1,147
Sun 16/313:45LCY - KUL
1 stop18h 00mKLM
Thu 20/320:55KUL - LCY
2 stops20h 35mKLM
Deal found 10/3$1,156
Sun 16/320:55LHR - BKK
1 stop19h 40mEtihad Airways
Sun 23/302:15BKK - LHR
1 stop35h 30mEtihad Airways
Deal found 9/3$1,169
Thu 2/1007:45LTN - HKT
2 stops42h 55mMultiple Airlines
Sat 11/1020:35HKT - LTN
2 stops32h 55mMultiple Airlines
Deal found 10/3$1,183
Wed 12/320:05LHR - BKK
1 stop27h 40mOman Air
Tue 18/320:05BKK - LHR
1 stop29h 20mOman Air
Deal found 10/3$1,189
Tue 1/414:20STN - KUL
2 stops22h 30mMultiple Airlines
Mon 14/421:40KUL - STN
2 stops28h 25mMultiple Airlines
Deal found 11/3$1,216

Find flights from London to Southeast Asia within your budget

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 647,157 searches. Data last updated 11 March 2025.

Fly from

London

Fly to

Southeast Asia

Route

Depart

Return

Price

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sun 25/5

22:40-00:10

1 stop19h 30m

Bangkok Suvarnabhumi

Sat 31/5

19:35-20:30

1 stop30h 55m

$958

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Mon 5/5

10:00-13:45

1 stop21h 45m

Bangkok Suvarnabhumi

Sat 17/5

15:25-07:30

1 stop22h 05m

$986

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sat 22/3

21:10-11:10

1 stop31h 00m

Bangkok Suvarnabhumi

Sun 6/4

12:10-19:50

1 stop37h 40m

$1,045

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Wed 30/4

08:40-09:30

1 stop18h 50m

Bangkok Suvarnabhumi

Wed 11/6

11:35-21:25

1 stop15h 50m

$1,099

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Mon 18/8

09:30-05:30

1 stop38h 00m

Bangkok Suvarnabhumi

Sun 28/9

07:05-15:10

1 stop38h 05m

$1,134

LondonKuala Lumpur

LTN - KUL

LTNKUL

London Luton

Sun 6/4

15:10-06:00

2 stops31h 50m

Kuala Lumpur Intl

Sat 12/4

22:30-23:25

2 stops31h 55m

$1,137

LondonKuala Lumpur

LCY - KUL

LCYKUL

London City

Thu 8/5

17:10-19:25

2 stops19h 15m

Kuala Lumpur Intl

Sun 18/5

23:55-08:10

1 stop15h 15m

$1,156

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Fri 16/5

09:55-09:15

2 stops17h 20m

Bangkok Suvarnabhumi

Sat 5/7

12:05-07:40

1 stop25h 35m

$1,177

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Wed 26/3

09:00-18:00

1 stop26h 00m

Bangkok Suvarnabhumi

Tue 20/5

02:55-15:15

1 stop18h 20m

$1,183

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sun 4/5

20:50-17:45

1 stop14h 55m

Bangkok Suvarnabhumi

Thu 15/5

09:00-19:10

1 stop16h 10m

$1,191

Flights are sorted by cheapest return flights first.

Deals found on 11/3

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.

Travel insights for flights from London to Southeast Asia

Get recent, data-driven insights about flights from London to Southeast Asia including ideal travel times, pricing trends, and more.

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

Currently, February is the cheapest month in which you can book a flight from London to Southeast Asia (average of $489). Flying from London to Southeast Asia in December is currently the most expensive (average of $911). 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 11 March 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London to Southeast Asia as you normally would.

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 11 March 2025.

The most flights from LON to zzYJX are scheduled on a Monday (8 on average). You will have fewer flight options on Tuesday, 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 11 March 2025.
Read through reviews of airlines operating flights from London to Southeast Asia, such as EVA Air, Garuda Indonesia and Singapore Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very Good
1,178 reviews
Check prices

Comfort

8.3

Boarding

8.4

Food

8.1

Crew

8.6

Entertainment

8.0

Overall

8.4

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

EVA Air
8.4
Very Good
1,178 reviews
EVA Air
8.4
Very Good
1,178 reviews
Check prices

Comfort

8.3

Boarding

8.4

Food

8.1

Crew

8.6

Entertainment

8.0

Overall

8.4

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

Garuda Indonesia
8.1
Very Good
73 reviews
EVA Air
8.4
Very Good
1,178 reviews
Check prices

Comfort

8.3

Boarding

8.4

Food

8.1

Crew

8.6

Entertainment

8.0

Overall

8.4

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

Singapore Airlines
8.1
Very Good
1,283 reviews
EVA Air
8.4
Very Good
1,178 reviews
Check prices

Comfort

8.3

Boarding

8.4

Food

8.1

Crew

8.6

Entertainment

8.0

Overall

8.4

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

Emirates
8.0
Very Good
3,214 reviews
EVA Air
8.4
Very Good
1,178 reviews
Check prices

Comfort

8.3

Boarding

8.4

Food

8.1

Crew

8.6

Entertainment

8.0

Overall

8.4

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

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 Etihad Airways ($658), Singapore Airlines ($668), and China Eastern ($676).

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

    While some choose either London Stansted - Denpasar Bali Ngurah Rai or London City - Phuket City, London City - Denpasar Bali Ngurah Rai is the most popular route from London to Southeast Asia.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from London to Southeast Asia on time: Air Canada (66%), Thai Airways (61%), EVA Air (55%).

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

    On average you can expect to pay $2,773 for a flight from London to Southeast Asia. The cheapest flight overall is $774 while the most popular route, (London City - Denpasar Bali Ngurah Rai) is currently priced at $967.

  • 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, February is the cheapest month in which you can book a flight from London to Southeast Asia (average of $489). Flying from London to Southeast Asia in December is currently the most expensive (average of $911). 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

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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
Heathrow to Singapore flights
Gatwick to Suvarnabhumi flights

Top 4 airlines flying from London to Southeast Asia

Discover the top 4 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 647,157 searches. Data last updated 11 March 2025.
AirlineCheapestAverageFlexibilityOn-time
Air ChinaCheapest$902Average$1,025FlexibilityNo cancel feeOn-time67%
Search Air China flights
Singapore AirlinesCheapest$1,117Average$1,303FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights
Thai AirwaysCheapest$1,229Average$1,244FlexibilityNo cancel feeOn-time77%
Search Thai Airways flights
Etihad AirwaysCheapest$1,381Average$1,391FlexibilityNo cancel feeOn-time75%
Search Etihad Airways 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?

When you search for this flight from London to Southeast Asia, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Cheapflights helps you find that perfect flight to Southeast Asia from London by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Yes! Cheapflights helps users easily find flights from London to Southeast Asia with no change fees.

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

Not ready to book yet? You can track prices for flights from London to Southeast Asia on Cheapflights with our Price Alert feature and get notified when better prices are available.

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