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£292+ 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 3/2. Fares are subject to change and may not be available on all flights or dates of travel.
— BKK
15 Jan — 22 Jan1
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 16 December 2025.

Sun 28/1221:15LHR - BKK
1 stop29h 50mHainan Airlines
Tue 20/111:10BKK - LHR
1 stop36h 10mHainan Airlines
Deal found 15/12£447
Wed 31/1219:45LHR - BKK
1 stop31h 20mHainan Airlines
Tue 20/111:10BKK - LHR
1 stop36h 10mHainan Airlines
Deal found 15/12£455
Sun 28/1221:15LHR - BKK
1 stop29h 50mHainan Airlines
Thu 22/111:10BKK - LHR
2 stops37h 25mHainan Airlines
Deal found 15/12£467
Sat 27/1211:05LGW - BKK
1 stop31h 25mAir China
Sat 10/102:30BKK - LGW
1 stop35h 25mAir China
Deal found 14/12£473
Wed 31/1219:45LHR - BKK
1 stop31h 20mHainan Airlines
Sun 15/319:10BKK - LHR
2 stops29h 45mHainan Airlines
Deal found 14/12£502
Mon 29/1221:10LHR - KUL
1 stop38h 20mShenzhen Airlines
Thu 29/120:30KUL - LHR
1 stop30h 40mShenzhen Airlines
Deal found 14/12£516
Wed 31/1219:45LHR - BKK
1 stop31h 20mHainan Airlines
Tue 13/119:10BKK - LHR
1 stop28h 10mHainan Airlines
Deal found 15/12£518
Mon 29/1221:10LHR - KUL
1 stop22h 10mShenzhen Airlines
Tue 20/113:25KUL - LHR
1 stop37h 45mShenzhen Airlines
Deal found 13/12£520
Tue 30/1219:20LHR - BKK
1 stop16h 25mEtihad Airways
Wed 14/109:25BKK - LHR
1 stop28h 15mEtihad Airways
Deal found 15/12£524
Wed 31/1220:55LHR - BKK
1 stop19h 30mEtihad Airways
Wed 28/114:40BKK - LHR
1 stop23h 00mEtihad Airways
Deal found 15/12£525
Sun 28/1221:15LHR - BKK
1 stop29h 50mHainan Airlines
Sun 25/111:10BKK - LHR
2 stops37h 45mHainan Airlines
Deal found 15/12£530
Wed 24/1215:55LGW - KUL
1 stop16h 25mMultiple Airlines
Sun 28/1220:05KUL - LGW
1 stop25h 55mMultiple Airlines
Deal found 14/12£532

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 16 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 16 December 2025.

Return from

£440

One-way from

£292

Popular in

December

Cheapest in

May

Average price

£852
7/2-28/2
  • 7/2-28/2
  • 6 total stops
  • 74h 50m total
  • London to Bangkok
Search Deals
3/2
  • 3/2
  • 3 total stops
  • 41h 05m total
  • London to Southeast Asia
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£54 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£20 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 16 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

Fri 6/2

21:10-11:10

1 stop31h 00m

Bangkok Suvarnabhumi

Tue 17/2

03:15-19:10

1 stop22h 55m

£483

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Mon 1/6

20:35-07:30

1 stop27h 55m

Singapore Changi

Sun 14/6

23:00-19:00

1 stop27h 00m

£505

LondonKuala Lumpur

LHR - KUL

LHRKUL

London Heathrow

Mon 23/2

21:10-19:30

1 stop38h 20m

Kuala Lumpur Intl

Tue 3/3

13:25-19:10

1 stop37h 45m

£515

LondonKuala Lumpur

LHR - KUL

LHRKUL

London Heathrow

Mon 23/2

21:10-19:30

1 stop38h 20m

Kuala Lumpur Intl

Sun 1/3

04:20-19:10

1 stop22h 50m

£515

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Thu 22/1

21:50-12:30

1 stop30h 40m

Singapore Changi

Mon 26/1

20:00-14:45

1 stop26h 45m

£517

LondonBangkok

LTN - BKK

LTNBKK

London Luton

Sat 7/2

06:15-09:50

2 stops20h 35m

Bangkok Suvarnabhumi

Sat 14/2

06:35-23:15

3 stops47h 40m

£517

LondonKuala Lumpur

LHR - KUL

LHRKUL

London Heathrow

Tue 13/1

22:00-01:40

2 stops43h 40m

Kuala Lumpur Intl

Tue 20/1

18:20-18:35

1 stop32h 15m

£522

LondonBangkok

LGW - BKK

LGWBKK

London Gatwick

Wed 4/3

16:00-10:25

Nonstop11h 25m

Bangkok Suvarnabhumi

Sun 29/3

11:30-18:30

Nonstop13h 00m

£524

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Wed 11/2

09:30-12:30

1 stop19h 00m

Singapore Changi

Sun 15/2

20:00-06:35

1 stop18h 35m

£537

LondonBangkok

LTN - BKK

LTNBKK

London Luton

Sun 8/2

08:00-09:50

2 stops18h 50m

Bangkok Suvarnabhumi

Wed 25/2

22:05-17:00

2 stops25h 55m

£541

Flights are sorted by cheapest return flights first.

Deals found on 13/12

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 56 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 Monday (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.

Emirates
Emirates
From £321
Qatar Airways
Qatar Airways
From £438
Etihad Airways
Etihad Airways
From £439
Thai Airways
Thai Airways
From £494

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 16 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
1,413 reviews
Check prices

Entertainment

8.0

Food

7.8

Crew

8.6

Overall

8.1

Boarding

8.3

Comfort

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
1,413 reviews
Singapore Airlines
8.1
Very Good
1,413 reviews
Check prices

Entertainment

8.0

Food

7.8

Crew

8.6

Overall

8.1

Boarding

8.3

Comfort

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
1,095 reviews
Singapore Airlines
8.1
Very Good
1,413 reviews
Check prices

Entertainment

8.0

Food

7.8

Crew

8.6

Overall

8.1

Boarding

8.3

Comfort

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
122 reviews
Singapore Airlines
8.1
Very Good
1,413 reviews
Check prices

Entertainment

8.0

Food

7.8

Crew

8.6

Overall

8.1

Boarding

8.3

Comfort

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
3,683 reviews
Singapore Airlines
8.1
Very Good
1,413 reviews
Check prices

Entertainment

8.0

Food

7.8

Crew

8.6

Overall

8.1

Boarding

8.3

Comfort

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
127 reviews
Singapore Airlines
8.1
Very Good
1,413 reviews
Check prices

Entertainment

8.0

Food

7.8

Crew

8.6

Overall

8.1

Boarding

8.3

Comfort

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 £72, however they can be found for as little as £20.

  • 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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Fly with Cheapflights

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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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