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

As of October 2025, there are 359 flights per week flying from London Heathrow Airport to Southeast Asia. The most common day of the week flights depart is Mon, with 14% of flights taking off on this day.

Which airlines fly to Southeast Asia?

Thai Airways, Air China and Etihad Airways are the top three most popular airlines that fly to Southeast Asia from London Heathrow Airport according to our data. Thai Airways is the first choice among our users, with 35% of people opting to fly with this airline when travelling to Southeast Asia. Keep in mind that there are 40 different airlines that fly to Southeast Asia on a routine basis, so you have a few additional options to choose from.

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

As of October 2025, there are 51 flights per day flying from London Heathrow Airport to Southeast Asia. The most common time of day flights depart is 21:00, with 65% of flights taking off in the evening.

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

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

How many operators does momondo search for flights from London Heathrow Airport to Southeast Asia?

As of October 2025, there are 42 operators available to choose from for flights from London Heathrow Airport to Southeast Asia.

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

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from London Heathrow Airport to Southeast Asia.

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

The required travel and health documents for your Southeast Asia trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Southeast Asia. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

£258 Cheap Flights from London Heathrow Airport to Southeast Asia in 2025/26

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17:40 - 11:55LHR-HAN

35h 15m1 stop

13:20 - 15:55HAN-LHR

33h 35m1 stop

£398Air China

Find Deal

to, 27 marras - to, 4 joulu

17:40 - 11:55LHR-HAN

35h 15m1 stop

13:30 - 17:50HAN-LHR

35h 20m1 stop

£399Air China

Find Deal

pe, 28 marras - pe, 5 joulu

21:10 - 13:55LHR-HAN

33h 45m1 stop

02:10 - 19:10HAN-LHR

24h 00m1 stop

£436Shenzhen Airlines

Find Deal

ke, 3 joulu - su, 7 joulu

21:10 - 01:10LHR-HAN

21h 00m1 stop

14:55 - 19:10HAN-LHR

35h 15m1 stop

£438Shenzhen Airlines

Find Deal

ke, 14 tammi - pe, 23 tammi

17:15 - 23:15LHR-HAN

23h 00m2 stops

19:45 - 18:35HAN-LHR

29h 50m1 stop

£439China Southern

Find Deal

ke, 19 marras - to, 27 marras

21:30 - 01:40LHR-SGN

21h 10m2 stops

08:00 - 18:35SGN-LHR

17h 35m1 stop

£445China Southern

Find Deal

to, 20 marras - ke, 26 marras

13:55 - 09:35LHR-SIN

35h 40m1 stop

19:25 - 06:40SIN-LHR

19h 15m1 stop

£461Etihad Airways

Find Deal

ke, 12 marras - su, 16 marras

20:55 - 09:35LHR-SIN

28h 40m1 stop

19:25 - 12:05SIN-LHR

24h 40m1 stop

£462Etihad Airways

Find Deal

ma, 10 marras - pe, 14 marras

21:00 - 01:10LHR-SGN

21h 10m1 stop

02:10 - 17:30SGN-LHR

22h 20m1 stop

£485China Eastern

Find Deal

su, 9 marras - su, 30 marras

21:00 - 00:55LHR-BKK

20h 55m1 stop

18:15 - 17:30BKK-LHR

30h 15m2 stops

£489China Eastern

Find Deal

to, 27 marras - pe, 30 tammi

China Eastern flights from London Heathrow Airport to Southeast Asia

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

China Eastern

9 Nov

LHR21:00London Heathrow

21h 10m

1 stop

SGN01:10Ho Chi Minh City

30 Nov

SGN02:10Ho Chi Minh City

22h 20m

1 stop

LHR17:30London Heathrow

£485

Find similar

China Eastern

27 Nov

LHR21:00London Heathrow

20h 55m

1 stop

BKK00:55Bangkok Suvarnabhumi

30 Jan

BKK18:15Bangkok Suvarnabhumi

30h 15m

2 stops

LHR17:30London Heathrow

£489

Find similar

China Eastern

18 Nov

LHR21:00London Heathrow

34h 55m

2 stops

BKK14:55Bangkok Suvarnabhumi

3 Dec

BKK10:45Bangkok Suvarnabhumi

37h 45m

1 stop

LHR17:30London Heathrow

£491

Find similar

Air India flights from London Heathrow Airport to Southeast Asia

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

Air India

18 Mar

LHR21:05London Heathrow

15h 50m

1 stop

SGN19:55Ho Chi Minh City

2 Apr

SGN20:55Ho Chi Minh City

16h 35m

1 stop

LHR07:30London Heathrow

£447

Find similar

Air India

18 Mar

LHR21:05London Heathrow

15h 50m

1 stop

SGN19:55Ho Chi Minh City

2 Apr

SGN20:55Ho Chi Minh City

16h 35m

1 stop

LHR07:30London Heathrow

£450

Find similar

Air India

18 Nov

LHR08:45London Heathrow

26h 10m

1 stop

SIN18:55Singapore Changi

19 Nov

SIN23:00Singapore Changi

29h 30m

1 stop

LHR20:30London Heathrow

£461

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momondo Fare Finder

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

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Route

Depart

Return

Price

LondonHanoi

LHR - HAN

LHRHAN

London Heathrow

to 27/11

17:40-11:55

1 stop35h 15m

Hanoi Noibai

to 4/12

13:20-15:55

1 stop33h 35m

£398

LondonHanoi

LHR - HAN

LHRHAN

London Heathrow

pe 28/11

17:40-11:55

1 stop35h 15m

Hanoi Noibai

pe 5/12

13:30-17:50

1 stop35h 20m

£399

LondonHanoi

LHR - HAN

LHRHAN

London Heathrow

ke 3/12

21:10-13:55

1 stop33h 45m

Hanoi Noibai

su 7/12

02:10-19:10

1 stop24h 00m

£436

LondonHanoi

LHR - HAN

LHRHAN

London Heathrow

ke 14/1

21:10-01:10

1 stop21h 00m

Hanoi Noibai

pe 23/1

14:55-19:10

1 stop35h 15m

£438

LondonHanoi

LHR - HAN

LHRHAN

London Heathrow

ke 19/11

17:15-23:15

2 stops23h 00m

Hanoi Noibai

to 27/11

19:45-18:35

1 stop29h 50m

£439

LondonHo Chi Minh City

LHR - SGN

LHRSGN

London Heathrow

to 20/11

21:30-01:40

2 stops21h 10m

Ho Chi Minh City

ke 26/11

08:00-18:35

1 stop17h 35m

£445

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

ke 12/11

13:55-09:35

1 stop35h 40m

Singapore Changi

su 16/11

19:25-06:40

1 stop19h 15m

£461

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

ma 10/11

20:55-09:35

1 stop28h 40m

Singapore Changi

pe 14/11

19:25-12:05

1 stop24h 40m

£462

LondonHo Chi Minh City

LHR - SGN

LHRSGN

London Heathrow

su 9/11

21:00-01:10

1 stop21h 10m

Ho Chi Minh City

su 30/11

02:10-17:30

1 stop22h 20m

£485

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

to 27/11

21:00-00:55

1 stop20h 55m

Bangkok Suvarnabhumi

pe 30/1

18:15-17:30

2 stops30h 15m

£489

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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 month of September is, on average, the cheapest month to fly to Southeast Asia from London Heathrow Airport, with most prices found around £622. If you are unable to visit Southeast Asia during the month of September, then departing from London Heathrow Airport during the month May is also very affordable. Most momondo users find prices during this month for around £626.

What is the cheapest day to depart on your flight to Southeast Asia?

Our data shows that Tuesday is the least expensive day to fly to Southeast Asia. Tickets to fly out on this day can be as low as £733. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to Southeast Asia on Saturday is £780.

What is the cheapest time of day to depart on your flight to Southeast Asia?

At midday is the cheapest time of day to fly from London Heathrow Airport to Southeast Asia when you can find flight prices for as low as £658. Flying to Southeast Asia at midday is an ideal time because this is during off-peak travel hours. Try not to purchase tickets in the evening because they tend to be around £764. Of course, these prices can vary depending on the time of year and what airport you fly to.

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 £717 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 £661 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 20m
Direct flights	Mon, Tue, Thu and Sat
Airports in Southeast Asia	1 airport

The fastest flight from London Heathrow Airport to Southeast Asia takes 11h 20m

Direct flights go from London Heathrow Airport to Southeast Asia on Monday, Tuesday, Thursday and Saturday. There are no airlines offering direct flights..

There is 1 airport near Southeast Asia: Hanoi Noibai (HAN)

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 many operators does momondo search for flights from London Heathrow Airport to Southeast Asia?
As of October 2025, there are 42 operators available to choose from for flights from London Heathrow Airport to Southeast Asia.
How old do you have to be to fly from London Heathrow Airport to Southeast Asia?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from London Heathrow Airport to Southeast Asia.
What documentation or ID do you need to fly to Southeast Asia?
The required travel and health documents for your Southeast Asia trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Southeast Asia. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from London Heathrow Airport to Southeast Asia?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from London Heathrow Airport to Southeast Asia is Boeing 787-9 Dreamliner (19.03% of total bookings). The next most popular plane models are Airbus A350-1000 (17.94%), Boeing 777 (11.88%), and Boeing 777-300ER (8.31%).

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
Hainan Airlines	PriceFrom £384	Free Cancellation	Rating 8.1 50 reviews	Search Hainan Airlines flights
KLM	PriceFrom £424	Free Cancellation	Rating 7.7 1,406 reviews	Search KLM flights
Royal Brunei Airlines	PriceFrom £435	Free Cancellation	Rating 0.0 0 reviews	Search Royal Brunei Airlines flights
Lufthansa	PriceFrom £438	Free Cancellation	Rating 6.8 7,543 reviews	Search Lufthansa flights
SWISS	PriceFrom £440	Free Cancellation	Rating 7.5 1,777 reviews	Search SWISS flights
Austrian Airlines	PriceFrom £448	Free Cancellation	Rating 7.6 862 reviews	Search Austrian Airlines flights
Finnair	PriceFrom £461	Free Cancellation	Rating 7.6 1,333 reviews	Search Finnair flights
Norse Atlantic UK	PriceFrom £464	Free Cancellation	Rating 7.2 51 reviews	Search Norse Atlantic UK flights
Turkish Airlines	PriceFrom £515	Free Cancellation	Rating 7.3 4,033 reviews	Search Turkish Airlines flights
IndiGo	PriceFrom £538	Free Cancellation	Rating 6.9 492 reviews	Search IndiGo flights

Why use momondo?

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

Finding the right flight to Southeast Asia from London is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Southeast Asia quick and easy, saving you time and money.

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

Flights from London to Southeast Asia with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

momondo helps you find the best flight between London and Southeast Asia by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Yes momondo offers price alerts on flights to Southeast Asia from London. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Southeast Asia trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.

Start using Trips

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Popular Cities in Southeast Asia

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Flights to Lisbonfrom £29

Cheap flights from London Heathrow Airport to Southeast Asia from £258

Big names, great deals

Big names, great deals

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Filter for what you want

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Find the cheapest flights from London Heathrow Airport to Southeast Asia

Cheap return flights

Cheap one-way flights

Cheap last-minute flights

Cheap direct flights

China Eastern flights from London Heathrow Airport to Southeast Asia

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

Air India flights from London Heathrow Airport to Southeast Asia

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

momondo Fare Finder

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

See travel insights to Southeast Asia from

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

What is the cheapest month to fly to Southeast Asia?

What is the cheapest day to depart on your flight to Southeast Asia?

What is the cheapest time of day to depart on your flight to Southeast Asia?

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?

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.

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

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

Which airlines fly to Southeast Asia?

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

As of October 2025, there are 51 flights per day flying from London Heathrow Airport to Southeast Asia. The most common time of day flights depart is 21:00, with 65% of flights taking off in the evening.

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

As of October 2025, there are 359 flights per week flying from London Heathrow Airport to Southeast Asia. The most common day of the week flights depart is Mon, with 14% of flights taking off on this day.

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

Direct flights

Airports in Southeast Asia

When did momondo last update prices for flights from London Heathrow Airport to Southeast Asia?

How many operators does momondo search for flights from London Heathrow Airport to Southeast Asia?

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

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

What is the most popular plane model from London Heathrow Airport to Southeast Asia?

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

Why use momondo?

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

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

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

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

An easier way to manage your Southeast Asia trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Southeast Asia

Popular Cities in Southeast Asia

Popular flights according to clicks in the last 7 days on momondo