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

Hainan Airlines and China Eastern are the most popular carriers operating from London to Southeast Asia

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

The number of flights available between London and Southeast Asia is 239 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 to Southeast Asia on average per day?

34 flights are operational daily from London to Southeast Asia as of March 2026. The most popular departure time for this route is 21:00, with 64% of flights per day taking off in the evening.

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

Prices for flights from London to Southeast Asia refresh daily.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London 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.

₹ 38,247 Cheap Flights from London to Southeast Asia in 2026

1 adult

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Find the cheapest flights from London to Southeast Asia

Round-trip

One-way

Last minute

Direct

Cheap return flights

Enter your travel dates to find the best prices.

22:10 - 11:00

LHR

IXZ

32h 20m

2 stops

15:05 - 20:20

IXZ

LHR

33h 45m

1 stop

₹ 64,115Air India

Sun, 14 Jun - Thu, 18 Jun

22:05 - 02:00

LHR

SIN

20h 55m

1 stop

03:00 - 19:50

SIN

LHR

23h 50m

1 stop

₹ 64,208Shenzhen Airlines

Fri, 15 May - Fri, 29 May

21:20 - 17:00

LHR

SIN

36h 40m

1 stop

00:55 - 18:40

SIN

LHR

24h 45m

1 stop

₹ 64,393China Eastern

Thu, 14 May - Tue, 19 May

13:15 - 11:00

LHR

IXZ

17h 15m

1 stop

15:05 - 20:20

IXZ

LHR

33h 45m

1 stop

₹ 64,485Air India

Sun, 14 Jun - Thu, 18 Jun

22:05 - 02:00

LHR

SIN

20h 55m

1 stop

18:10 - 19:50

SIN

LHR

32h 40m

1 stop

₹ 64,485Shenzhen Airlines

Wed, 13 May - Sun, 31 May

21:20 - 20:10

LHR

SIN

39h 50m

1 stop

00:55 - 18:40

SIN

LHR

24h 45m

1 stop

₹ 64,577China Eastern

Tue, 21 Apr - Fri, 8 May

13:35 - 18:30

LHR

SIN

21h 55m

1 stop

21:35 - 20:40

SIN

LHR

30h 05m

1 stop

₹ 64,762Finnair

Sun, 13 Sep - Sun, 20 Sep

21:20 - 15:45

LHR

SIN

35h 25m

1 stop

23:10 - 18:40

SIN

LHR

26h 30m

1 stop

₹ 64,854China Eastern

Tue, 9 Jun - Fri, 19 Jun

21:20 - 15:45

LHR

SIN

35h 25m

1 stop

00:55 - 18:40

SIN

LHR

24h 45m

1 stop

₹ 64,947China Eastern

Sat, 2 May - Wed, 13 May

07:30 - 18:30

LHR

SIN

28h 00m

1 stop

21:35 - 20:40

SIN

LHR

30h 05m

1 stop

₹ 65,132Finnair

Mon, 31 Aug - Mon, 14 Sep

Shenzhen Airlines flights from London to Southeast Asia

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

Shenzhen Airlines

15 May

LHR22:05London Heathrow

20h 55m

1 stop

SIN02:00Singapore Changi

29 May

SIN03:00Singapore Changi

23h 50m

1 stop

LHR19:50London Heathrow

₹ 64,208

Shenzhen Airlines

13 May

LHR22:05London Heathrow

20h 55m

1 stop

SIN02:00Singapore Changi

31 May

SIN18:10Singapore Changi

32h 40m

1 stop

LHR19:50London Heathrow

₹ 64,485

Shenzhen Airlines

24 May

LHR22:05London Heathrow

20h 55m

1 stop

SIN02:00Singapore Changi

29 May

SIN03:00Singapore Changi

23h 50m

1 stop

LHR19:50London Heathrow

₹ 65,963

China Eastern flights from London to Southeast Asia

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

China Eastern

14 May

LHR21:20London Heathrow

36h 40m

1 stop

SIN17:00Singapore Changi

19 May

SIN00:55Singapore Changi

24h 45m

1 stop

LHR18:40London Heathrow

₹ 64,393

China Eastern

21 Apr

LHR21:20London Heathrow

39h 50m

1 stop

SIN20:10Singapore Changi

8 May

SIN00:55Singapore Changi

24h 45m

1 stop

LHR18:40London Heathrow

₹ 64,577

China Eastern

9 Jun

LHR21:20London Heathrow

35h 25m

1 stop

SIN15:45Singapore Changi

19 Jun

SIN23:10Singapore Changi

26h 30m

1 stop

LHR18:40London Heathrow

₹ 64,854

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonPort Blair

LHR - IXZ

LHRIXZ

London Heathrow

Sun 14/6

22:10-11:00

2 stops32h 20m

Port Blair

Thu 18/6

15:05-20:20

1 stop33h 45m

₹ 64,115

Fastest return journey

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Fri 15/5

22:05-02:00

1 stop20h 55m

Singapore Changi

Fri 29/5

03:00-19:50

1 stop23h 50m

₹ 64,208

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Thu 14/5

21:20-17:00

1 stop36h 40m

Singapore Changi

Tue 19/5

00:55-18:40

1 stop24h 45m

₹ 64,393

LondonPort Blair

LHR - IXZ

LHRIXZ

London Heathrow

Sun 14/6

13:15-11:00

1 stop17h 15m

Port Blair

Thu 18/6

15:05-20:20

1 stop33h 45m

₹ 64,485

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Wed 13/5

22:05-02:00

1 stop20h 55m

Singapore Changi

Sun 31/5

18:10-19:50

1 stop32h 40m

₹ 64,485

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Tue 21/4

21:20-20:10

1 stop39h 50m

Singapore Changi

Fri 8/5

00:55-18:40

1 stop24h 45m

₹ 64,577

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Sun 13/9

13:35-18:30

1 stop21h 55m

Singapore Changi

Sun 20/9

21:35-20:40

1 stop30h 05m

₹ 64,762

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Tue 9/6

21:20-15:45

1 stop35h 25m

Singapore Changi

Fri 19/6

23:10-18:40

1 stop26h 30m

₹ 64,854

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Sat 2/5

21:20-15:45

1 stop35h 25m

Singapore Changi

Wed 13/5

00:55-18:40

1 stop24h 45m

₹ 64,947

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Mon 31/8

07:30-18:30

1 stop28h 00m

Singapore Changi

Mon 14/9

21:35-20:40

1 stop30h 05m

₹ 65,132

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 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?

In general, May is the cheapest month to fly from London to Southeast Asia. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around ₹ 47,116. If you aren’t able to travel during the month of May, then book flights to Southeast Asia from London during September instead. Flights to Southeast Asia in September, while not as cheap as those in May, still average around ₹ 67,072.

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

The cheapest day to depart from London to Southeast Asia is on a Thursday. Travellers who choose to depart for Southeast Asia on a Thursday will often find tickets for as low as ₹ 89,357. The most expensive day to fly to Southeast Asia is Friday, with ticket prices averaging around ₹ 130,506.

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

According to our data, the cheapest time of day to fly to Southeast Asia is in the evening. momondo users have found flights departing from London to Southeast Asia in the evening for as low as ₹ 113,852. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are ₹ 140,596 on average. Flights to Southeast Asia from London in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

What is the cheapest London to Southeast Asia flight route?

Fly from London Heathrow to Singapore Changi for the best London - 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 when booking weeks ahead of your departure date. In general, you can expect to find flights to Southeast Asia for around ₹ 86,842 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 for as low as ₹ 81,669 on momondo.

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

There are 3 cabin classes available to choose from on London 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 to Southeast Asia flights?

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

Cheap London to Southeast Asia flight deals and tips

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

Fastest flight time	13h 05m
Direct flights	Every day
Airports in Southeast Asia	295 airports

The fastest flight from London to Southeast Asia takes 13h 05m

Direct flights go from London to Southeast Asia every day.

There are 295 airports in Southeast Asia. From London there are direct flights to Singapore Changi (SIN).

Search flight deals

When did momondo last update prices for flights from London to Southeast Asia?
Prices for flights from London to Southeast Asia refresh daily.
How old do you have to be to fly from London to Southeast Asia?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London 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 to Southeast Asia?
Based on momondo bookings for flights between London and Southeast Asia, the leading plane model is Boeing 787-9 Dreamliner, making up 19.20% of the total bookings. Other popular models include Airbus A350-1000 with 17.05%, Boeing 777 with 10.59%, and Boeing 777-300ER with 10.13%.

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. All flights to Southeast Asia from London on momondo can be compared and filtered by various policies on offer, including flexible booking.

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.