How many flights depart from London Heathrow Airport to Southeast Asia on average per week?

The number of flights available between London Heathrow Airport and Southeast Asia is 358 per week as of March 2026. The most frequent departure day is Mon, with 15% of weekly flights leaving on this day.

How many flights depart from London Heathrow Airport to Southeast Asia on average per day?

As of March 2026, 51 flights take off from London Heathrow Airport and land in Southeast Asia each day. The most common flight departure time for this route is 21:00, with 65% of daily flights taking off in the evening.

What is the cheapest airline that flies from London Heathrow to Southeast Asia?

China Eastern, Shenzhen Airlines, and Air India are the most popular carriers operating from London Heathrow to Southeast Asia

How old do you have to be to fly from London Heathrow Airport to Southeast Asia?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London Heathrow Airport to Southeast Asia.

What documentation or ID do you need to fly to Southeast Asia?

The travel and health documents required for your trip to Southeast Asia can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Southeast Asia. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$524 Cheap Flights from London Heathrow Airport to Southeast Asia in 2026

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Find the cheapest flights from London Heathrow Airport to Southeast Asia

Round-trip

One-way

Last minute

Direct

Cheap return flights

Enter your travel dates to find the best prices.

21:20 - 21:55

LHR

BKK

18h 35m

1 stop

05:05 - 18:40

BKK

LHR

19h 35m

1 stop

$825China Eastern

Wed, 13 May - Mon, 18 May

22:10 - 00:05

LHR

BKK

19h 55m

1 stop

15:25 - 14:15

BKK

LHR

28h 50m

1 stop

$828SAUDIA

Thu, 23 Apr - Thu, 30 Apr

21:20 - 04:05

LHR

BKK

24h 45m

1 stop

07:50 - 18:40

BKK

LHR

40h 50m

2 stops

$829China Eastern

Sun, 3 May - Mon, 18 May

22:05 - 18:15

LHR

BKK

38h 10m

1 stop

03:15 - 20:00

BKK

LHR

22h 45m

1 stop

$835Shenzhen Airlines

Sat, 2 May - Tue, 26 May

22:05 - 02:15

LHR

BKK

22h 10m

1 stop

03:15 - 20:00

BKK

LHR

22h 45m

1 stop

$839Shenzhen Airlines

Fri, 1 May - Thu, 14 May

20:50 - 00:10

LHR

SIN

20h 20m

2 stops

19:15 - 06:30

SIN

LHR

18h 15m

2 stops

$982Multiple Airlines

Sun, 26 Apr - Sun, 3 May

22:00 - 03:10

LHR

SIN

22h 10m

1 stop

20:00 - 15:20

SIN

LHR

26h 20m

1 stop

$992Multiple Airlines

Wed, 15 Apr - Tue, 28 Apr

17:50 - 16:35

LHR

SIN

15h 45m

1 stop

23:40 - 08:40

SIN

LHR

16h 00m

1 stop

$995Lufthansa

Sat, 2 May - Sun, 14 Jun

21:45 - 21:40

LHR

KUL

16h 55m

1 stop

22:40 - 19:00

KUL

LHR

27h 20m

1 stop

$1,024Air India

Tue, 19 May - Sun, 31 May

21:45 - 07:00

LHR

KUL

26h 15m

1 stop

22:40 - 19:00

KUL

LHR

27h 20m

1 stop

$1,025Air India

Thu, 4 Jun - Sun, 14 Jun

Shenzhen Airlines flights from London Heathrow Airport to Southeast Asia

Our best Shenzhen Airlines deals on London Heathrow Airport to Southeast Asia flight tickets

Shenzhen Airlines

2 May

LHR22:05London Heathrow

38h 10m

1 stop

BKK18:15Bangkok Suvarnabhumi

28 May

BKK03:15Bangkok Suvarnabhumi

22h 45m

1 stop

LHR20:00London Heathrow

$835

Shenzhen Airlines

1 May

LHR22:05London Heathrow

31h 05m

1 stop

BKK11:10Bangkok Suvarnabhumi

10 May

BKK03:15Bangkok Suvarnabhumi

22h 35m

1 stop

LHR19:50London Heathrow

$839

Shenzhen Airlines

24 Apr

LHR22:05London Heathrow

38h 10m

1 stop

BKK18:15Bangkok Suvarnabhumi

5 May

BKK03:15Bangkok Suvarnabhumi

22h 45m

1 stop

LHR20:00London Heathrow

$841

SAUDIA flights from London Heathrow Airport to Southeast Asia

Our best SAUDIA deals on London Heathrow Airport to Southeast Asia flight tickets

SAUDIA

23 Apr

LHR22:10London Heathrow

19h 55m

1 stop

BKK00:05Bangkok Suvarnabhumi

30 Apr

BKK15:25Bangkok Suvarnabhumi

28h 50m

1 stop

LHR14:15London Heathrow

$828

SAUDIA

19 Apr

LHR22:10London Heathrow

19h 55m

1 stop

BKK00:05Bangkok Suvarnabhumi

30 June

BKK15:25Bangkok Suvarnabhumi

22h 05m

1 stop

LHR07:30London Heathrow

$831

SAUDIA

19 Apr

LHR22:10London Heathrow

19h 55m

1 stop

BKK00:05Bangkok Suvarnabhumi

21 June

BKK15:25Bangkok Suvarnabhumi

22h 05m

1 stop

LHR07:30London Heathrow

$833

momondo Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Southeast Asia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Wed 13/5

21:20-21:55

1 stop18h 35m

Bangkok Suvarnabhumi

Mon 18/5

05:05-18:40

1 stop19h 35m

$825

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Thu 23/4

22:10-00:05

1 stop19h 55m

Bangkok Suvarnabhumi

Thu 30/4

15:25-14:15

1 stop28h 50m

$828

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sun 3/5

21:20-04:05

1 stop24h 45m

Bangkok Suvarnabhumi

Mon 18/5

07:50-18:40

2 stops40h 50m

$829

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sat 2/5

22:05-18:15

1 stop38h 10m

Bangkok Suvarnabhumi

Tue 26/5

03:15-20:00

1 stop22h 45m

$835

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Fri 1/5

22:05-02:15

1 stop22h 10m

Bangkok Suvarnabhumi

Thu 14/5

03:15-20:00

1 stop22h 45m

$839

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Sun 26/4

20:50-00:10

2 stops20h 20m

Singapore Changi

Sun 3/5

19:15-06:30

2 stops18h 15m

$982

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Wed 15/4

22:00-03:10

1 stop22h 10m

Singapore Changi

Tue 28/4

20:00-15:20

1 stop26h 20m

$992

Fastest return journey

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Sat 2/5

17:50-16:35

1 stop15h 45m

Singapore Changi

Sun 14/6

23:40-08:40

1 stop16h 00m

$995

LondonKuala Lumpur

LHR - KUL

LHRKUL

London Heathrow

Tue 19/5

21:45-21:40

1 stop16h 55m

Kuala Lumpur Intl

Sun 31/5

22:40-19:00

1 stop27h 20m

$1,024

LondonKuala Lumpur

LHR - KUL

LHRKUL

London Heathrow

Thu 4/6

21:45-07:00

1 stop26h 15m

Kuala Lumpur Intl

Sun 14/6

22:40-19:00

1 stop27h 20m

$1,025

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from London Heathrow Airport to Southeast Asia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Southeast Asia?

The cheapest month to fly to Southeast Asia from London Heathrow Airport is in November. Flight prices, which tend to average around $1,265, are often lower during this time because this is during the off-season. The month of May is another great option to travel to Southeast Asia, with average flight prices from London Heathrow Airport averaging around $1,339.

What is the cheapest London Heathrow to Southeast Asia flight route?

Fly from London Heathrow to Singapore Changi for the best London Heathrow - Southeast Asia flight prices

How far in advance should I book a flight to Southeast Asia?

You are more likely to see cheaper flights to Southeast Asia from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Southeast Asia for around $1,549 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Southeast Asia from London Heathrow Airport for as low as $1,436 on momondo.

What cabin class options are available on London Heathrow to Southeast Asia flights?

There are 4 cabin classes available to choose from on London Heathrow to Southeast Asia flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on London Heathrow Airport to Southeast Asia flights?

No. A direct flight is the cheapest option for a flight between London Heathrow Airport to Southeast Asia.

Cheap London Heathrow Airport to Southeast Asia flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to Southeast Asia

Fastest flight time	11h 55m
Direct flights	Every day
Airports in Southeast Asia	295 airports

The fastest flight from London Heathrow Airport to Southeast Asia takes 11h 55m

Direct flights go from London Heathrow Airport to Southeast Asia every day.

There are 295 airports in Southeast Asia. From London Heathrow Airport there are direct flights to Bangkok Suvarnabhumi (BKK).

Search flight deals

When did momondo last update prices for flights from London Heathrow Airport to Southeast Asia?
Prices for flights from London Heathrow Airport to Southeast Asia are updated daily.
How old do you have to be to fly from London Heathrow Airport to Southeast Asia?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London Heathrow Airport to Southeast Asia.
What documentation or ID do you need to fly to Southeast Asia?
The travel and health documents required for your trip to Southeast Asia can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Southeast Asia. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from London Heathrow Airport to Southeast Asia?
momondo data reveals that the most frequently booked plane model on the route from London Heathrow Airport to Southeast Asia is Boeing 787-9 Dreamliner, representing 19.97% of all bookings. The subsequent popular models are Airbus A350-1000 at 19.40%, Boeing 777-300ER at 10.68%, and Boeing 777 at 9.47%.

Best airlines flying from London Heathrow Airport to Southeast Asia

Compare and see reviews for airlines that fly from London Heathrow Airport to Southeast Asia with momondo

Airline	Rating	Free cancellation	Price
Thai Airways	PriceFrom $1,106	Free cancellation	Rating 7.8 392 reviews		Search Thai Airways flights

Why use momondo?

Why should I use momondo to find a flight deal from London to Southeast Asia?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Southeast Asia from London.

Can I find flights from London to Southeast Asia with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Southeast Asia from London with this policy.

How can momondo help me find flights from London to Southeast Asia?

momondo provides multiple filters to help you find the best flight to Southeast Asia from London. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from London to Southeast Asia right now. Can momondo alert me if prices change?

Price alerts on flights to Southeast Asia from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.