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£275+ 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 5/2. Fares are subject to change and may not be available on all flights or dates of travel.
— BKK
27 Jan — 3 Feb1
1 adult
1 adult, Economy, 0 bags

Flights to Southeast Asia in 2025

Enter your travel dates to find the best prices.

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 28 December 2025.

Wed 31/1217:00LGW - BKK
1 stop36h 20mChina Eastern
Wed 21/110:45BKK - LGW
1 stop34h 15mChina Eastern
Deal found 27/12£465
Wed 31/1217:00LGW - BKK
1 stop17h 50mChina Eastern
Sun 25/119:55BKK - LGW
1 stop25h 05mChina Eastern
Deal found 27/12£499
Wed 31/1217:00LGW - BKK
1 stop17h 50mChina Eastern
Fri 23/119:55BKK - LGW
1 stop25h 05mChina Eastern
Deal found 27/12£501
Tue 30/1213:55LHR - BKK
1 stop21h 05mEtihad Airways
Sat 24/109:15BKK - LHR
1 stop28h 25mEtihad Airways
Deal found 26/12£512
Wed 31/1221:10LHR - BKK
1 stop31h 00mShenzhen Airlines
Tue 27/103:15BKK - LHR
1 stop22h 55mShenzhen Airlines
Deal found 26/12£513
Wed 31/1217:00LGW - BKK
1 stop17h 50mChina Eastern
Tue 20/115:05BKK - LGW
2 stops29h 55mChina Eastern
Deal found 26/12£535
Wed 31/1221:10LHR - BKK
1 stop31h 00mShenzhen Airlines
Sun 1/219:30BKK - LHR
1 stop30h 40mShenzhen Airlines
Deal found 26/12£542
Mon 29/1211:00LHR - BKK
1 stop18h 05mCathay Pacific
Tue 20/117:40BKK - LHR
1 stop19h 50mCathay Pacific
Deal found 27/12£551
Wed 31/1217:00LGW - BKK
1 stop17h 50mChina Eastern
Thu 29/119:55BKK - LGW
1 stop25h 05mChina Eastern
Deal found 26/12£563
Wed 31/1217:00LGW - BKK
1 stop17h 50mChina Eastern
Tue 27/101:55BKK - LGW
1 stop19h 05mChina Eastern
Deal found 27/12£565
Mon 29/1213:55LHR - BKK
1 stop34h 15mEtihad Airways
Thu 15/108:55BKK - LHR
1 stop28h 45mEtihad Airways
Deal found 27/12£565
Wed 31/1217:00LGW - BKK
1 stop36h 20mChina Eastern
Wed 29/402:10BKK - LGW
1 stop18h 50mChina Eastern
Deal found 27/12£566

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 28 December 2025
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Find flight deals to Southeast Asia

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 28 December 2025.

Return from

£412

One-way from

£275

Popular in

December

Cheapest in

May

Average price

£843
China Southern
  • China Southern
  • 3/2-27/3
  • 3 total stops
  • 46h 20m total
  • London to Bangkok
Search Deals
5/2
  • 5/2
  • 2 total stops
  • 34h 15m total
  • London to Southeast Asia
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£53 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£19 potential savings vs. average return price).
Search Deals
Average for return flights in December 2025
Search Deals

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 28 December 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

Sat 7/2

21:10-11:10

1 stop31h 00m

Bangkok Suvarnabhumi

Sun 15/2

19:30-19:10

1 stop30h 40m

£418

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sun 11/1

21:10-18:30

1 stop38h 20m

Bangkok Suvarnabhumi

Sat 24/1

12:10-19:10

1 stop38h 00m

£418

LondonBangkok

LTN - BKK

LTNBKK

London Luton

Sun 25/1

08:05-21:05

3 stops30h 00m

Bangkok Suvarnabhumi

Sun 1/2

22:05-23:10

2 stops32h 05m

£429

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Tue 9/6

22:15-16:05

Nonstop11h 50m

Bangkok Suvarnabhumi

Sun 21/6

22:35-05:55

Nonstop13h 20m

£459

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Thu 5/3

19:20-05:55

1 stop27h 35m

Bangkok Suvarnabhumi

Thu 18/6

15:05-12:45

1 stop27h 40m

£459

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Thu 5/3

20:55-18:45

1 stop14h 50m

Bangkok Suvarnabhumi

Tue 16/6

15:05-07:00

1 stop21h 55m

£471

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sat 17/1

13:55-23:25

1 stop26h 30m

Bangkok Suvarnabhumi

Mon 9/2

19:35-18:10

2 stops29h 35m

£471

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Wed 7/1

19:45-03:10

1 stop23h 25m

Singapore Changi

Wed 11/3

04:40-16:20

1 stop19h 40m

£476

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Thu 5/3

19:20-18:45

1 stop16h 25m

Bangkok Suvarnabhumi

Wed 17/6

09:10-18:45

1 stop15h 35m

£479

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Tue 3/2

09:30-12:30

1 stop19h 00m

Singapore Changi

Mon 16/2

20:00-06:35

1 stop18h 35m

£497

Flights are sorted by cheapest return flights first.

Deals found on 27/12

Showing 1-10 of 60 results
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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
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 Saturday 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 Tuesday (10 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (8 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.

Qatar Airways
Qatar Airways
From £433
Emirates
Emirates
From £317
Etihad Airways
Etihad Airways
From £434
Thai Airways
Thai Airways
From £489

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 China Eastern.

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 28 December 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
1,421 reviews
Check prices

Crew

8.6

Food

7.8

Comfort

8.0

Overall

8.1

Boarding

8.3

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.
Singapore Airlines
8.1
Very Good
1,421 reviews
Singapore Airlines
8.1
Very Good
1,421 reviews
Check prices

Crew

8.6

Food

7.8

Comfort

8.0

Overall

8.1

Boarding

8.3

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.
Cathay Pacific
7.6
Good
1,106 reviews
Singapore Airlines
8.1
Very Good
1,421 reviews
Check prices

Crew

8.6

Food

7.8

Comfort

8.0

Overall

8.1

Boarding

8.3

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.
China Southern
7.5
Good
123 reviews
Singapore Airlines
8.1
Very Good
1,421 reviews
Check prices

Crew

8.6

Food

7.8

Comfort

8.0

Overall

8.1

Boarding

8.3

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.
Qatar Airways
7.4
Good
3,695 reviews
Singapore Airlines
8.1
Very Good
1,421 reviews
Check prices

Crew

8.6

Food

7.8

Comfort

8.0

Overall

8.1

Boarding

8.3

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.
Air China
7.2
Good
134 reviews
Singapore Airlines
8.1
Very Good
1,421 reviews
Check prices

Crew

8.6

Food

7.8

Comfort

8.0

Overall

8.1

Boarding

8.3

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.

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, Turkmenistan Airlines 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 £62, however they can be found for as little as £35.

  • 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 15 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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