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£255+ Cheap flights to Southeast Asia

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 22/9. Fares are subject to change and may not be available on all flights or dates of travel.
— BKK
12 Oct — 19 Oct1
1 adult
1 adult, Economy

Flights to Southeast Asia in 2025

Find the latest flights to Southeast Asia in 2025, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 858,174 searches and data was last updated on 12 September 2025.

Return from

£439

One-way from

£255

Popular in

December

Cheapest in

May

Average price

£543
Norse Atlantic UK
  • Norse Atlantic UK
  • 28/11-11/12
  • 1 total stop
  • 43h 45m total
  • London to Bangkok
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Shenzhen Airlines
  • Shenzhen Airlines
  • 22/9
  • 1 total stop
  • 22h 15m total
  • London to Southeast Asia
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Highest demand for flights based on searches. 8% potential increase in price (£42 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease (£16 potential savings vs. average return price).
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Average for return flights in September 2025
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Find flights to Southeast Asia

Browse one-way and return flights deals to Southeast Asia on Cheapflights. Flight deals are based on user searches and were last updated on 12 September 2025
Explore Southeast Asia
Flights to Bangkok
Flights to Manila
Flights to Denpasar
Flights to Kuala Lumpur
Flights to Phuket City
Flights to Singapore

Find flight deals to Southeast Asia

Cheapest flights to Southeast Asia
Explore the most affordable flight options available to Southeast Asia. Find the lowest fares based on data from user searches, with prices last updated on 12 September 2025.

Fri 28/1111:40LGW - BKK
1 stop30h 50mMultiple Airlines
Thu 11/1212:25BKK - LGW
Nonstop12h 55mMultiple Airlines
Deal found 12/9£439
Fri 28/1122:00LHR - BKK
1 stop33h 30mChina Southern
Wed 10/1202:10BKK - LHR
1 stop23h 25mChina Southern
Deal found 12/9£439
Fri 3/1021:50LGW - BKK
3 stops29h 35mMultiple Airlines
Wed 29/1012:30BKK - LGW
Nonstop13h 00mMultiple Airlines
Deal found 11/9£439
Wed 17/912:30LHR - BKK
1 stop25h 05mAir India
Sat 4/1020:50BKK - LHR
1 stop28h 40mAir India
Deal found 10/9£439
Wed 24/907:25STN - BKK
2 stops18h 25mMultiple Airlines
Tue 28/1017:25BKK - STN
1 stop35h 10mMultiple Airlines
Deal found 11/9£439
Sat 20/921:20LHR - BKK
1 stop21h 20mChina Eastern
Sun 5/1002:10BKK - LHR
1 stop22h 30mChina Eastern
Deal found 12/9£440
Sat 18/1016:55LGW - BKK
1 stop14h 10mMultiple Airlines
Fri 7/1112:20BKK - LGW
1 stop27h 15mMultiple Airlines
Deal found 11/9£441
Wed 1/1022:00LHR - BKK
1 stop38h 15mHainan Airlines
Thu 30/1001:35BKK - LHR
1 stop23h 00mHainan Airlines
Deal found 10/9£441
Thu 16/1020:25LHR - MNL
2 stops21h 35mMultiple Airlines
Sat 18/1001:45MNL - LHR
2 stops25h 45mMultiple Airlines
Deal found 10/9£441
Wed 1/1011:35LGW - BKK
2 stops31h 40mChina Eastern
Wed 15/1015:55BKK - LGW
3 stops44h 35mChina Eastern
Deal found 10/9£441
Wed 5/1117:40LHR - BKK
1 stop17h 25mAir China
Wed 19/1101:30BKK - LHR
1 stop21h 25mAir China
Deal found 10/9£441
Sat 22/1122:00LHR - MNL
1 stop28h 50mChina Southern
Sat 6/1217:55MNL - LHR
1 stop32h 40mChina Southern
Deal found 11/9£442

Cheapflights Fare Finder

 
Locate flights to Southeast Asia that fit your budget, with regularly updated fares and availability. In the last 7 days, Cheapflights users made a total of 858,174 searches and data was last updated on 12 September 2025.
Use the filters below to find and compare flights to Southeast Asia that are best for you.

Fly from

London

Route

Depart

Return

Price

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Wed 3/12

21:10-02:15

1 stop22h 05m

Bangkok Suvarnabhumi

Sat 13/12

19:30-19:10

1 stop30h 40m

£446

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sun 2/11

21:10-18:30

1 stop38h 20m

Bangkok Suvarnabhumi

Fri 28/11

19:30-19:10

1 stop30h 40m

£446

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Fri 3/10

21:50-11:20

3 stops31h 30m

Bangkok Suvarnabhumi

Mon 27/10

12:30-18:30

Nonstop13h 00m

£449

LondonBangkok

LTN - BKK

LTNBKK

London Luton

Mon 17/11

07:50-18:05

2 stops27h 15m

Bangkok Suvarnabhumi

Sun 30/11

17:55-19:25

2 stops32h 30m

£467

LondonBangkok

LTN - BKK

LTNBKK

London Luton

Mon 17/11

07:50-00:10

2 stops33h 20m

Bangkok Suvarnabhumi

Fri 28/11

17:55-19:25

2 stops32h 30m

£468

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Tue 23/9

06:55-18:50

2 stops29h 55m

Bangkok Suvarnabhumi

Tue 7/10

10:05-08:20

2 stops28h 15m

£474

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Sat 10/1

10:30-14:55

2 stops21h 25m

Bangkok Suvarnabhumi

Fri 16/1

01:55-14:00

1 stop19h 05m

£484

LondonManila

LHR - MNL

LHRMNL

London Heathrow

Fri 3/10

22:05-01:40

1 stop20h 35m

Manila Ninoy Aquino Intl

Thu 23/10

02:55-20:00

1 stop24h 05m

£488

LondonSingapore

LGW - SIN

LGWSIN

London Gatwick

Wed 29/10

10:35-12:30

1 stop17h 55m

Singapore Changi

Thu 26/2

20:25-06:20

1 stop17h 55m

£491

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Sun 18/1

16:00-10:25

Nonstop11h 25m

Bangkok Suvarnabhumi

Sat 24/1

12:25-18:20

Nonstop12h 55m

£500

Flights are sorted by cheapest return flights first.

Deals found on 11/9

Showing 1-10 of 60 results
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6

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
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

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 24 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.

When is the cheapest time to fly to Southeast Asia?

Use this chart to determine the cheapest time to fly return from London to Southeast Asia. Price data was last updated on 16 December 2024.

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

Weekly flight availability to Southeast Asia

The most flights from London to Southeast Asia are scheduled on a Monday (7 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (7 on average).

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

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

Emirates
Emirates
From £437
Qatar Airways
Qatar Airways
From £585
Thai Airways
Thai Airways
From £661
Etihad Airways
Etihad Airways
From £566

What are the cheapest airlines that fly to Southeast Asia?

The cheapest airlines flying from London to Southeast Asia are Bangkok Airways, Oman Air and Air China.

Rainfall in Southeast Asia by month

Plan your trip to Southeast Asia by taking into account the average rainfall totals 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

Plan your trip to Southeast Asia by taking into account the average temperature totals 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).

Reviews of airlines servicing Southeast Asia

Get insights into the airlines that provide service to Southeast Asia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Southeast Asia. Reviews last updated 12 September 2025.
Read through reviews of airlines serving Southeast Asia, such as Singapore Airlines, Cathay Pacific, andChina Southern. 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
8.1
Very Good
1,365 reviews
Check prices

Boarding

8.2

Crew

8.6

Entertainment

8.0

Overall

8.1

Comfort

8.0

Food

7.7

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
8.1
Very Good
1,365 reviews
Singapore Airlines
8.1
Very Good
1,365 reviews
Check prices

Boarding

8.2

Crew

8.6

Entertainment

8.0

Overall

8.1

Comfort

8.0

Food

7.7

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
993 reviews
Singapore Airlines
8.1
Very Good
1,365 reviews
Check prices

Boarding

8.2

Crew

8.6

Entertainment

8.0

Overall

8.1

Comfort

8.0

Food

7.7

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
China Southern
7.5
Good
110 reviews
Singapore Airlines
8.1
Very Good
1,365 reviews
Check prices

Boarding

8.2

Crew

8.6

Entertainment

8.0

Overall

8.1

Comfort

8.0

Food

7.7

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
3,624 reviews
Singapore Airlines
8.1
Very Good
1,365 reviews
Check prices

Boarding

8.2

Crew

8.6

Entertainment

8.0

Overall

8.1

Comfort

8.0

Food

7.7

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
7.2
Good
99 reviews
Singapore Airlines
8.1
Very Good
1,365 reviews
Check prices

Boarding

8.2

Crew

8.6

Entertainment

8.0

Overall

8.1

Comfort

8.0

Food

7.7

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, Norse Atlantic UK 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 £69, however they can be found for as little as £55.

  • 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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How does Cheapflights help users find flights to Southeast Asia?

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Why should you use Cheapflights to find cheap flight tickets to Southeast Asia?

Millions of users choose and trust Cheapflights to book the best flight deals to Southeast Asia for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights to Southeast Asia with no change fees?

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

Can Cheapflights notify me if prices for flights to Southeast Asia become cheaper?

Not ready to book yet? You can track prices for flights to Southeast Asia on Cheapflights with our Price Alerts feature and get notified when better prices are available.

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