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£243+ Cheap flights to Southeast Asia

— BKK
23 Sep — 30 Sep1
1 adult
1 adult, Economy, 0 bags

Flights to Southeast Asia in 2026

Enter your travel dates to find the best prices.

Cheapest flights to Southeast Asia

Thu 24/911:10 -
1 stop17h 10m
Sun 18/1018:05 -
1 stop18h 25m
Deal found 21/8£433
Thu 24/922:00 -
1 stop22h 15m
Sat 10/1003:15 -
1 stop22h 45m
Deal found 23/8£433
Wed 11/1111:35 -
2 stops29h 35m
Thu 26/1119:30 -
2 stops31h 55m
Deal found 21/8£433
Sat 29/818:00 -
1 stop20h 55m
Fri 4/903:15 -
1 stop21h 55m
Deal found 22/8£434
Mon 28/907:15 -
2 stops29h 05m
Mon 12/1014:50 -
2 stops29h 45m
Deal found 21/8£434
Thu 3/922:40 -
1 stop19h 30m
Sun 13/919:35 -
1 stop30h 50m
Deal found 21/8£434
Wed 30/921:20 -
2 stops38h 45m
Fri 30/1005:55 -
1 stop32h 35m
Deal found 20/8£434
Tue 29/912:35 -
1 stop29h 35m
Sun 27/1214:35 -
1 stop23h 20m
Deal found 21/8£435
Tue 20/1020:25 -
1 stop35h 10m
Wed 4/1101:30 -
1 stop21h 25m
Deal found 22/8£435
Mon 9/1117:15 -
1 stop32h 20m
Tue 17/1105:40 -
1 stop16h 25m
Deal found 23/8£435
Tue 27/1011:05 -
1 stop30h 40m
Tue 3/1102:30 -
1 stop35h 25m
Deal found 23/8£435
Thu 1/1022:40 -
1 stop19h 30m
Fri 16/1018:20 -
1 stop31h 55m
Deal found 23/8£435

Find flights to Southeast Asia

Explore Southeast Asia
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Find flight deals to Southeast Asia

Return from

£433

One-way from

£243

Popular in

December

Cheapest in

September

Average price

£689
China Southern
  • China Southern
  • 24/9-18/10
  • 2 total stops
  • 35h 35m total
  • London to Bangkok
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China Eastern
  • China Eastern
  • 1/9
  • 1 total stop
  • 20h 40m total
  • London to Southeast Asia
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£48 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£21 potential savings vs. average return price).
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Average for return flights in August 2026
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Cheapflights Fare Finder

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

Fly from

Route

Depart

Return

Price

Cheapest return flight

LondonBangkok

LHR London Heathrow - BKK Bangkok Suvarnabhumi

LHRBKK

London Heathrow

Fri 20/11

21:10-01:20

1 stop21h 10m

Bangkok Suvarnabhumi

Thu 3/12

02:20-19:10

1 stop23h 50m

£465

LondonBangkok

LTN London Luton - BKK Bangkok Suvarnabhumi

LTNBKK

London Luton

Wed 30/9

15:15-17:45

2 stops20h 30m

Bangkok Suvarnabhumi

Tue 13/10

09:15-22:50

2 stops19h 35m

£487

LondonBangkok

LTN London Luton - BKK Bangkok Suvarnabhumi

LTNBKK

London Luton

Sat 7/11

09:10-18:00

2 stops25h 50m

Bangkok Suvarnabhumi

Fri 20/11

08:30-21:05

2 stops19h 35m

£506

LondonBangkok

LTN London Luton - BKK Bangkok Suvarnabhumi

LTNBKK

London Luton

Sun 27/9

06:20-10:20

2 stops22h 00m

Bangkok Suvarnabhumi

Mon 7/12

16:20-10:45

2 stops25h 25m

£507

LondonBangkok

LTN London Luton - BKK Bangkok Suvarnabhumi

LTNBKK

London Luton

Sat 26/9

14:25-18:10

2 stops21h 45m

Bangkok Suvarnabhumi

Sat 17/10

20:35-15:15

2 stops24h 40m

£533

LondonBangkok

LHR London Heathrow - BKK Bangkok Suvarnabhumi

LHRBKK

London Heathrow

Fri 27/11

06:40-10:35

1 stop20h 55m

Bangkok Suvarnabhumi

Sun 6/12

12:35-12:55

2 stops31h 20m

£558

LondonBangkok

LTN London Luton - BKK Bangkok Suvarnabhumi

LTNBKK

London Luton

Tue 6/10

16:10-20:25

2 stops22h 15m

Bangkok Suvarnabhumi

Tue 13/10

09:15-22:50

2 stops19h 35m

£558

LondonBangkok

LCY London City - BKK Bangkok Suvarnabhumi

LCYBKK

London City

Mon 21/9

09:20-09:30

1 stop18h 10m

Bangkok Suvarnabhumi

Wed 14/10

12:05-08:50

1 stop26h 45m

£593

LondonBangkok

LGW London Gatwick - BKK Bangkok Suvarnabhumi

LGWBKK

London Gatwick

Tue 8/9

22:15-16:05

Nonstop11h 50m

Bangkok Suvarnabhumi

Fri 2/10

22:35-05:55

Nonstop13h 20m

£599

LondonBangkok

STN London Stansted - BKK Bangkok Suvarnabhumi

STNBKK

London Stansted

Fri 2/10

17:35-05:10

1 stop29h 35m

Bangkok Suvarnabhumi

Wed 14/10

06:40-16:50

1 stop16h 10m

£604

Flights are sorted by cheapest return flights first.

Deals found on 21/8

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight to Southeast Asia

Have a flexible travel schedule? Discover the best time to fly to Southeast Asia with our price prediction graph.
Estimated return price

Cheapflights Insights

Everything you need to know about your flight to Southeast Asia

How long is the flight to Southeast Asia?

On average, a flight from London to Southeast Asia takes 23 hours 23 minutes. Flights to Southeast Asia from other popular cities in United Kingdom will vary in length. Below are a few examples of popular routes and their flight times.

Weekly flight availability to Southeast Asia

The most flights from London to Southeast Asia are scheduled on a Saturday (11 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (9 on average).

What are the most popular airlines that fly to Southeast Asia?

The most popular airlines flying from London to Southeast Asia are Etihad Airways, Qatar Airways and Singapore Airlines.

Etihad Airways
Etihad Airways
From £312
Qatar Airways
Qatar Airways
From £432
Emirates
Emirates
From £339
Singapore Airlines
Singapore Airlines
From £184

What are the cheapest airlines that fly to Southeast Asia?

The cheapest airlines flying from London to Southeast Asia are HK Express, AirAsia X and Bangkok Airways.

Rainfall in Southeast Asia 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

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).

When is the best time to book a flight to Southeast Asia?

Booking 45 days in advance of your planned departure date is, on average, the best time to get cheap flights to Southeast Asia. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

When is the cheapest time to fly to Southeast Asia?

Users looking for the lowest fares to Southeast Asia should consider flying on Tuesday at midday, when prices are typically cheapest. Budget-minded travellers will want to avoid Friday at midday, when prices are usually at their highest.

Reviews of airlines servicing Southeast Asia

Read through reviews of airlines serving Southeast Asia, such as Singapore Airlines,Cathay Pacific, andQatar Airways. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Singapore Airlines
8.2
Very Good
1,585 reviews
Check prices

Entertainment

8.1

Food

7.8

Comfort

8.0

Overall

8.2

Crew

8.7

Boarding

8.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered
Singapore Airlines
8.2
Very Good
1,585 reviews
Singapore Airlines
8.2
Very Good
1,585 reviews
Check prices

Entertainment

8.1

Food

7.8

Comfort

8.0

Overall

8.2

Crew

8.7

Boarding

8.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered
Cathay Pacific
7.6
Good
1,457 reviews
Singapore Airlines
8.2
Very Good
1,585 reviews
Check prices

Entertainment

8.1

Food

7.8

Comfort

8.0

Overall

8.2

Crew

8.7

Boarding

8.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered
Qatar Airways
7.4
Good
3,735 reviews
Singapore Airlines
8.2
Very Good
1,585 reviews
Check prices

Entertainment

8.1

Food

7.8

Comfort

8.0

Overall

8.2

Crew

8.7

Boarding

8.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered
Air China
7.4
Good
161 reviews
Singapore Airlines
8.2
Very Good
1,585 reviews
Check prices

Entertainment

8.1

Food

7.8

Comfort

8.0

Overall

8.2

Crew

8.7

Boarding

8.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered
Etihad Airways
7.3
Good
1,509 reviews
Singapore Airlines
8.2
Very Good
1,585 reviews
Check prices

Entertainment

8.1

Food

7.8

Comfort

8.0

Overall

8.2

Crew

8.7

Boarding

8.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered

FAQs about flying to Southeast Asia

  • Can I find cheaper flights to Southeast Asia if I am willing to have stopovers?

    Yes, flights with stopovers are often cheaper than direct flights. Keep an eye out for flight deals to Southeast Asia on Cheapflights that require 1 or 2 stops for potential cost savings.

  • What is the best airline to fly to Southeast Asia?

    Based on reviews from Cheapflights users, HK Express is rated the highest out of the airlines that fly to Southeast Asia.

  • How much is a return flight to Southeast Asia?

    A return flight to Southeast Asia will typically cost around £261, however they can be found for as little as £34.

  • Where does the fastest flight to Southeast Asia depart from?

    For those looking to save time traveling to Southeast Asia, London offers the quickest one-way flight (11 hours 20 minutes).

  • Does Bangkok Suvarnabhumi have car hire?

    Yes. Those touching down at Bangkok Suvarnabhumi can take advantage of the car hire services offered upon their arrival.

  • Are there hotels close to Bangkok Suvarnabhumi?

    Yes. Bangkok Suvarnabhumi has hotels nearby for those requiring accommodations. Louis Tavern Dayrooms At Suvarnabhumi Airport is the closest property to Bangkok Suvarnabhumi (0.0 mi away from Bangkok Suvarnabhumi).

See more FAQs

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Users can book flights with no change fees policies with our dedicated filters. Book flights to Southeast Asia flexibly with Cheapflights today.

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