How long is the flight from United Kingdom to Southeast Asia?

The average flight duration from United Kingdom to Southeast Asia depends on which airport you fly into and out of. Flying from London Heathrow to Kastrup Copenhagen is 1h 45m on average, while flying from Manchester to Kastrup Copenhagen is 1h 50m on average. Kastrup Copenhagen is the most popular airport in Southeast Asia.

Find Cheap Flights to Southeast Asia in 2026

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Recent flights found to popular cities in Southeast Asia

Find flights to these popular cities in Southeast Asia from your nearest airport.

Flights to Bangkok Suvarnabhumi Airport

Search all flight deals to Bangkok Suvarnabhumi Airport

Air China

27 Sept

LGW

37h 45m

1 stop

BKK

18 Oct

BKK

21h 55m

1 stop

LGW

£475

Hainan Airlines

12 Aug

LHR

30h 00m

1 stop

BKK

10 Sept

BKK

30h 10m

2 stops

LHR

£475

Multiple Airlines

15 Sept

STN

31h 35m

2 stops

BKK

14 Oct

BKK

30h 00m

2 stops

STN

£475

Multiple Airlines

1 Sept

LGW

19h 00m

1 stop

BKK

29 Sept

BKK

30h 35m

2 stops

LGW

£476

Multiple Airlines

13 Oct

LHR

20h 10m

2 stops

BKK

3 Nov

BKK

18h 05m

1 stop

LHR

£476

China Eastern

1 Oct

LGW

24h 10m

1 stop

BKK

17 Oct

BKK

31h 35m

1 stop

LGW

£477

Air China

26 Aug

LHR

19h 30m

1 stop

BKK

5 Sept

BKK

30h 50m

1 stop

LHR

£477

Multiple Airlines

7 Sept

STN

25h 40m

2 stops

BKK

21 Sept

BKK

28h 35m

2 stops

STN

£477

Multiple Airlines

15 Sept

LGW

21h 10m

2 stops

BKK

11 Oct

BKK

30h 35m

2 stops

LGW

£478

China Eastern

2 Oct

LHR

35h 35m

3 stops

BKK

11 Oct

BKK

51h 50m

2 stops

LHR

£478

Multiple Airlines

16 Oct

LTN

21h 45m

2 stops

BKK

8 Nov

BKK

37h 10m

2 stops

LTN

£478

China Eastern

12 Nov

LGW

22h 25m

1 stop

BKK

20 Nov

BKK

25h 05m

1 stop

LGW

£478

Flights to Manila

Search all flight deals to Manila

Multiple Airlines

27 Aug

NCL

24h 45m

2 stops

MNL

6 Sept

MNL

33h 00m

2 stops

NCL

£587

Multiple Airlines

18 Oct

LHR

25h 10m

1 stop

MNL

2 Nov

MNL

32h 40m

1 stop

LHR

£597

China Southern

17 Nov

LGW

30h 30m

2 stops

MNL

2 Dec

MNL

20h 35m

1 stop

LGW

£597

Multiple Airlines

15 Nov

STN

31h 50m

2 stops

MNL

11 Dec

MNL

31h 45m

2 stops

STN

£597

SWISS

1 Sept

LHR

21h 15m

2 stops

MNL

15 Dec

MNL

20h 20m

2 stops

LHR

£597

Multiple Airlines

6 Nov

LGW

30h 30m

1 stop

MNL

25 Nov

MNL

20h 35m

1 stop

LGW

£597

Multiple Airlines

11 Nov

LHR

34h 35m

2 stops

MNL

10 Mar

MNL

22h 40m

2 stops

LHR

£598

Multiple Airlines

22 Sept

LTN

26h 05m

2 stops

MNL

9 Oct

MNL

24h 35m

2 stops

LTN

£598

Multiple Airlines

4 Jan

LGW

28h 50m

2 stops

MNL

15 Jan

MNL

42h 20m

2 stops

LGW

£598

Multiple Airlines

29 Oct

STN

30h 15m

2 stops

MNL

13 Nov

MNL

31h 45m

2 stops

STN

£598

Multiple Airlines

27 Oct

LHR

27h 40m

2 stops

MNL

10 Nov

MNL

20h 35m

2 stops

LHR

£599

Gulf Air

9 Sept

LGW

17h 50m

1 stop

MNL

8 Oct

MNL

25h 10m

1 stop

LGW

£599

Flights to Denpasar

Search all flight deals to Denpasar

Multiple Airlines

16 Nov

EDI

33h 35m

2 stops

DPS

29 Nov

DPS

34h 55m

2 stops

EDI

£538

Multiple Airlines

20 Nov

EDI

33h 35m

2 stops

DPS

6 Dec

DPS

34h 55m

2 stops

EDI

£543

Multiple Airlines

15 Oct

EDI

32h 45m

2 stops

DPS

1 Dec

DPS

24h 05m

2 stops

EDI

£591

Multiple Airlines

11 Nov

BHX

29h 05m

2 stops

DPS

25 Nov

DPS

34h 40m

2 stops

BHX

£602

Multiple Airlines

15 Oct

EDI

33h 20m

3 stops

DPS

2 Dec

DPS

31h 40m

2 stops

EDI

£606

Multiple Airlines

22 Sept

BHX

30h 30m

2 stops

DPS

13 Oct

DPS

24h 00m

2 stops

BHX

£607

Multiple Airlines

20 Sept

EDI

33h 10m

2 stops

DPS

22 Oct

DPS

32h 30m

2 stops

EDI

£608

Multiple Airlines

1 Nov

BHX

19h 10m

2 stops

DPS

29 Nov

DPS

24h 50m

2 stops

BHX

£611

Multiple Airlines

1 Nov

BHX

19h 10m

2 stops

DPS

29 Nov

DPS

24h 50m

2 stops

BHX

£613

Multiple Airlines

1 Nov

BHX

24h 40m

2 stops

DPS

29 Nov

DPS

32h 50m

2 stops

BHX

£616

Multiple Airlines

26 Sept

EDI

30h 30m

3 stops

DPS

15 Oct

DPS

37h 30m

3 stops

EDI

£621

Multiple Airlines

16 Oct

EDI

30h 15m

2 stops

DPS

22 Oct

DPS

34h 30m

2 stops

EDI

£622

Flights to Kuala Lumpur Intl Airport

Search all flight deals to Kuala Lumpur Intl Airport

Multiple Airlines

2 Sept

EDI

36h 10m

2 stops

KUL

17 Sept

KUL

32h 05m

2 stops

EDI

£467

Multiple Airlines

7 Sept

GLA

51h 25m

2 stops

KUL

20 Sept

KUL

41h 45m

2 stops

GLA

£474

Multiple Airlines

9 Sept

EDI

34h 30m

2 stops

KUL

17 Sept

KUL

29h 45m

2 stops

EDI

£500

Multiple Airlines

10 Sept

EDI

32h 05m

2 stops

KUL

19 Sept

KUL

26h 25m

2 stops

EDI

£515

Multiple Airlines

2 Sept

EDI

22h 40m

2 stops

KUL

17 Sept

KUL

24h 20m

1 stop

EDI

£516

Multiple Airlines

6 Sept

GLA

29h 25m

2 stops

KUL

13 Sept

KUL

19h 35m

2 stops

GLA

£520

Multiple Airlines

7 Sept

GLA

23h 00m

2 stops

KUL

20 Sept

KUL

28h 15m

1 stop

GLA

£529

Multiple Airlines

11 Sept

EDI

19h 25m

2 stops

KUL

17 Sept

KUL

29h 45m

2 stops

EDI

£532

Multiple Airlines

16 Sept

EDI

34h 30m

2 stops

KUL

30 Sept

KUL

28h 55m

2 stops

EDI

£537

Multiple Airlines

10 Sept

EDI

36h 10m

1 stop

KUL

17 Sept

KUL

29h 45m

2 stops

EDI

£538

Multiple Airlines

9 Sept

GLA

49h 20m

2 stops

KUL

27 Sept

KUL

19h 35m

2 stops

GLA

£541

Multiple Airlines

9 Sept

GLA

34h 10m

2 stops

KUL

27 Sept

KUL

19h 35m

1 stop

GLA

£542

Flights to Phuket City

Search all flight deals to Phuket City

Multiple Airlines

1 Sept

EDI

34h 30m

2 stops

HKT

29 Sept

HKT

35h 35m

2 stops

EDI

£513

Multiple Airlines

20 Sept

BHX

34h 05m

2 stops

HKT

3 Oct

HKT

34h 40m

2 stops

BHX

£523

Multiple Airlines

2 Sept

GLA

34h 10m

2 stops

HKT

9 Sept

HKT

34h 45m

2 stops

GLA

£523

Multiple Airlines

1 Sept

EDI

34h 30m

2 stops

HKT

29 Sept

HKT

36h 35m

3 stops

EDI

£526

Multiple Airlines

4 Sept

EDI

27h 30m

2 stops

HKT

10 Sept

HKT

34h 30m

2 stops

EDI

£534

Multiple Airlines

2 Sept

EDI

30h 00m

2 stops

HKT

15 Sept

HKT

34h 00m

2 stops

EDI

£534

Multiple Airlines

19 Oct

EDI

43h 50m

2 stops

HKT

1 Nov

HKT

32h 30m

1 stop

EDI

£537

Multiple Airlines

19 Oct

EDI

43h 50m

2 stops

HKT

31 Oct

HKT

31h 10m

1 stop

EDI

£541

Multiple Airlines

7 Sept

GLA

26h 45m

2 stops

HKT

13 Sept

HKT

36h 00m

2 stops

GLA

£543

Multiple Airlines

1 Sept

BHX

35h 10m

3 stops

HKT

22 Sept

HKT

28h 40m

2 stops

BHX

£544

Etihad Airways

31 Oct

MAN

27h 00m

1 stop

HKT

14 Nov

HKT

22h 15m

1 stop

MAN

£545

Multiple Airlines

5 Sept

GLA

34h 15m

3 stops

HKT

14 Sept

HKT

34h 00m

2 stops

GLA

£546

Find the cheapest flights from the United Kingdom to Southeast Asia

Return

One-way

Last minute

Direct

Recent return flight deals from the United Kingdom to Southeast Asia

Enter your travel dates to find the best prices.

21:20 - 17:05

LGW

BKK

37h 45m

1 stop

14:50 - 06:45

BKK

LGW

21h 55m

1 stop

£475Air China

Sun, 27 Sep - Sun, 18 Oct

22:00 - 10:00

LHR

BKK

30h 00m

1 stop

19:20 - 19:30

BKK

LHR

30h 10m

2 stops

£475Hainan Airlines

Wed, 12 Aug - Thu, 10 Sep

10:35 - 00:10

STN

BKK

31h 35m

2 stops

20:35 - 20:35

BKK

STN

30h 00m

2 stops

£475Multiple Airlines

Tue, 15 Sep - Wed, 14 Oct

21:55 - 04:05

LGW

BKK

24h 10m

1 stop

05:05 - 06:40

BKK

LGW

31h 35m

1 stop

£477China Eastern

Thu, 1 Oct - Sat, 17 Oct

21:20 - 14:55

LHR

BKK

35h 35m

3 stops

20:50 - 18:40

BKK

LHR

51h 50m

2 stops

£478China Eastern

Fri, 2 Oct - Sun, 11 Oct

14:45 - 00:05

MAN

BKK

75h 20m

1 stop

01:50 - 12:55

BKK

MAN

17h 05m

1 stop

£586SAUDIA

Tue, 8 Sep - Mon, 21 Sep

21:45 - 19:45

LHR

KUL

15h 00m

1 stop

09:50 - 18:45

KUL

LHR

15h 55m

1 stop

£607Etihad Airways

Wed, 26 Aug - Tue, 22 Sep

09:30 - 19:45

LHR

KUL

27h 15m

1 stop

09:50 - 18:45

KUL

LHR

15h 55m

1 stop

£608Etihad Airways

Mon, 12 Oct - Wed, 21 Oct

09:05 - 12:30

LHR

DMK

21h 25m

1 stop

23:50 - 12:25

DMK

LHR

18h 35m

1 stop

£660Emirates

Wed, 9 Sep - Wed, 21 Oct

20:20 - 20:15

LHR

DMK

16h 55m

1 stop

22:55 - 13:50

DMK

LHR

21h 55m

1 stop

£662Emirates

Tue, 19 Jan - Thu, 28 Jan

Fly from

Route

Depart

Return

Price

Cheapest return flight

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Sun 27/9

21:20-17:05

1 stop37h 45m

Bangkok Suvarnabhumi

Sun 18/10

14:50-06:45

1 stop21h 55m

£475

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Wed 12/8

22:00-10:00

1 stop30h 00m

Bangkok Suvarnabhumi

Thu 10/9

19:20-19:30

2 stops30h 10m

£475

LondonBangkok

STN - BKK

STNBKK

London Stansted

Tue 15/9

10:35-00:10

2 stops31h 35m

Bangkok Suvarnabhumi

Wed 14/10

20:35-20:35

2 stops30h 00m

£475

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Thu 1/10

21:55-04:05

1 stop24h 10m

Bangkok Suvarnabhumi

Sat 17/10

05:05-06:40

1 stop31h 35m

£477

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Fri 2/10

21:20-14:55

3 stops35h 35m

Bangkok Suvarnabhumi

Sun 11/10

20:50-18:40

2 stops51h 50m

£478

ManchesterBangkok

MAN - BKK

MANBKK

Manchester

Tue 8/9

14:45-00:05

1 stop75h 20m

Bangkok Suvarnabhumi

Mon 21/9

01:50-12:55

1 stop17h 05m

£586

Fastest return journey

LondonKuala Lumpur

LHR - KUL

LHRKUL

London Heathrow

Wed 26/8

21:45-19:45

1 stop15h 00m

Kuala Lumpur Intl

Tue 22/9

09:50-18:45

1 stop15h 55m

£607

LondonKuala Lumpur

LHR - KUL

LHRKUL

London Heathrow

Mon 12/10

09:30-19:45

1 stop27h 15m

Kuala Lumpur Intl

Wed 21/10

09:50-18:45

1 stop15h 55m

£608

LondonBangkok

LHR - DMK

LHRDMK

London Heathrow

Wed 9/9

09:05-12:30

1 stop21h 25m

Bangkok Don Mueang Intl

Wed 21/10

23:50-12:25

1 stop18h 35m

£660

LondonBangkok

LHR - DMK

LHRDMK

London Heathrow

Tue 19/1

20:20-20:15

1 stop16h 55m

Bangkok Don Mueang Intl

Thu 28/1

22:55-13:50

1 stop21h 55m

£662

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

Southeast Asia flights insights and trends

Explore insights for your Southeast Asia flight to craft the best travel plan

Prices

Airlines

Other information

See prices from:

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

Our data shows that Monday is the least expensive day to fly to Southeast Asia. Tickets to fly out on this day can be as low as £803. 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 £854.

Cheapest flights to cities in Southeast Asia

Click on the cities below to find out when it's cheapest to fly to Southeast Asia from United Kingdom

Bangkok

Find flights to Bangkok

Cheap Southeast Asia flight deals and tips

Summary info about Southeast Asia flight prices, duration and airlines

Best One-Way Price	£306
Best Round-Trip Price	£475
Fastest flight time	16h 45m
Popular in	December

The best one-way flight price to Southeast Asia from United Kingdom in the last 5 days is £306 (London Gatwick to Bangkok Suvarnabhumi).

Search Deals

The best return flight price to Southeast Asia from United Kingdom in the last 5 days is £475 (London Gatwick to Bangkok Suvarnabhumi).

Search Deals

The fastest flight to Southeast Asia from United Kingdom takes 16h 45m (London Stansted to Bangkok Suvarnabhumi).

Search Deals

December has the highest demand for flights to Southeast Asia, with a 7% price increase on average.

Search Deals

Frequently asked questions about flying to Southeast Asia

Which airlines fly to Southeast Asia?

There are a total of 40 airlines that operate flight routes to Southeast Asia, with Etihad Airways being the most popular option. An estimated 34% of those flying into Southeast Asia choose to fly with Etihad Airways. If you’re unable to find tickets with Etihad Airways, then Qatar Airways and Emirates are also popular airlines to fly with.

What is the best day of the week to fly to Southeast Asia?

If your travel plans are flexible and you’re looking to save money on flights to Southeast Asia, then be sure to book your departure on a Monday. Flying out on a Monday, as well as a Tuesday, is your best option. Departing on a Saturday tends to be the most expensive day of the week to fly to Southeast Asia.

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

Prices for flights to Southeast Asia were last updated today.

How many operators does momondo search for flights to Southeast Asia?

There are 97 operators available for flights to Southeast Asia as of July 2026.

How old do you have to be to fly 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 to Southeast Asia.

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

The necessary travel and health documents for your Southeast Asia trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight to Southeast Asia. momondo saves you time and could save you money on your trip.

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

momondo does allow users to show only those flights to Southeast Asia which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights to Southeast Asia?

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

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

If you are not ready to book a flight to Southeast Asia now, use our insights above to find helpful tips or alternatively set up a price alert; this is where momondo will track prices on flights to Southeast Asia and let you know when they change.