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£295+ 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 23/3. Fares are subject to change and may not be available on all flights or dates of travel.
— BKK
4 Jan — 11 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 5 December 2025.

Mon 29/1221:00LHR - BKK
2 stops38h 05mHainan Airlines
Tue 13/111:10BKK - LHR
1 stop36h 10mHainan Airlines
Deal found 3/12£456
Sat 6/1221:35LHR - BKK
1 stop36h 05mAir China
Tue 30/1223:50BKK - LHR
1 stop23h 05mAir China
Deal found 4/12£457
Sun 7/1207:25STN - BKK
2 stops40h 20mMultiple Airlines
Sun 14/1216:10BKK - STN
1 stop29h 40mMultiple Airlines
Deal found 4/12£459
Fri 5/1211:05LGW - BKK
1 stop31h 25mAir China
Fri 19/1202:30BKK - LGW
1 stop35h 25mAir China
Deal found 3/12£459
Fri 5/1214:05STN - BKK
2 stops40h 00mMultiple Airlines
Wed 17/1203:20BKK - STN
1 stop16h 45mMultiple Airlines
Deal found 4/12£460
Mon 29/1221:00LHR - BKK
2 stops38h 05mHainan Airlines
Thu 26/201:35BKK - LHR
2 stops23h 00mHainan Airlines
Deal found 4/12£461
Fri 5/1216:00LGW - BKK
Nonstop11h 25mNorse Atlantic UK
Wed 10/1212:30BKK - LGW
Nonstop13h 00mNorse Atlantic UK
Deal found 2/12£462
Sun 7/1221:15LHR - BKK
1 stop29h 50mHainan Airlines
Sun 14/1219:10BKK - LHR
2 stops29h 45mHainan Airlines
Deal found 3/12£462
Sat 6/1215:40LGW - BKK
1 stop14h 25mMultiple Airlines
Fri 19/1203:10BKK - LGW
2 stops41h 50mMultiple Airlines
Deal found 3/12£463
Sat 6/1206:45LGW - BKK
2 stops23h 20mMultiple Airlines
Wed 10/1212:30BKK - LGW
Nonstop13h 00mMultiple Airlines
Deal found 2/12£464
Fri 5/1222:05STN - BKK
2 stops32h 00mMultiple Airlines
Wed 10/1203:20BKK - STN
1 stop24h 15mMultiple Airlines
Deal found 3/12£464
Wed 3/1219:45LHR - BKK
1 stop31h 20mMultiple Airlines
Mon 15/1215:05BKK - LHR
2 stops33h 25mMultiple Airlines
Deal found 3/12£465

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 5 December 2025
Explore Southeast Asia
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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 5 December 2025.

Return from

£456

One-way from

£295

Popular in

December

Cheapest in

May

Average price

£876
Hainan Airlines
  • Hainan Airlines
  • 29/12-13/1
  • 3 total stops
  • 74h 15m total
  • London to Bangkok
Search Deals
Hainan Airlines
  • Hainan Airlines
  • 23/3
  • 2 total stops
  • 30h 10m total
  • London to Southeast Asia
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£59 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£21 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 5 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

Fri 20/2

12:10-19:10

1 stop38h 00m

£478

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Mon 12/1

21:10-18:30

1 stop38h 20m

Bangkok Suvarnabhumi

Sun 8/3

03:15-19:10

1 stop22h 55m

£481

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sun 11/1

21:10-11:10

1 stop31h 00m

Bangkok Suvarnabhumi

Sun 8/3

12:10-19:10

1 stop38h 00m

£481

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Fri 9/1

21:10-18:30

1 stop38h 20m

Bangkok Suvarnabhumi

Sun 8/3

03:15-19:10

1 stop22h 55m

£481

LondonManila

LGW - MNL

LGWMNL

London Gatwick

Wed 14/1

10:30-21:40

2 stops27h 10m

Manila Ninoy Aquino Intl

Fri 6/2

02:05-14:00

1 stop19h 55m

£513

LondonManila

LGW - MNL

LGWMNL

London Gatwick

Wed 14/1

17:00-01:00

1 stop24h 00m

Manila Ninoy Aquino Intl

Fri 6/2

02:05-14:00

1 stop19h 55m

£516

LondonKuala Lumpur

LHR - KUL

LHRKUL

London Heathrow

Wed 20/5

21:45-19:50

1 stop15h 05m

Kuala Lumpur Intl

Thu 18/6

09:35-15:15

1 stop36h 40m

£534

LondonKuala Lumpur

LHR - KUL

LHRKUL

London Heathrow

Sun 26/4

14:45-19:50

1 stop22h 05m

Kuala Lumpur Intl

Fri 8/5

09:35-12:45

1 stop34h 10m

£536

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sat 2/5

14:45-11:50

1 stop15h 05m

Bangkok Suvarnabhumi

Thu 14/5

02:55-12:45

1 stop15h 50m

£539

LondonBangkok

LCY - BKK

LCYBKK

London City

Mon 12/1

17:50-08:25

2 stops31h 35m

Bangkok Suvarnabhumi

Tue 20/1

13:15-08:45

1 stop26h 30m

£540

Flights are sorted by cheapest return flights first.

Deals found on 4/12

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 24 hours 2 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.

Emirates
Emirates
From £331
Qatar Airways
Qatar Airways
From £439
Etihad Airways
Etihad Airways
From £438
Thai Airways
Thai Airways
From £495

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 5 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
1,411 reviews
Check prices

Boarding

8.3

Entertainment

8.0

Food

7.8

Comfort

8.0

Crew

8.6

Overall

8.1

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
1,411 reviews
Singapore Airlines
8.1
Very Good
1,411 reviews
Check prices

Boarding

8.3

Entertainment

8.0

Food

7.8

Comfort

8.0

Crew

8.6

Overall

8.1

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
1,084 reviews
Singapore Airlines
8.1
Very Good
1,411 reviews
Check prices

Boarding

8.3

Entertainment

8.0

Food

7.8

Comfort

8.0

Crew

8.6

Overall

8.1

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
121 reviews
Singapore Airlines
8.1
Very Good
1,411 reviews
Check prices

Boarding

8.3

Entertainment

8.0

Food

7.8

Comfort

8.0

Crew

8.6

Overall

8.1

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
3,678 reviews
Singapore Airlines
8.1
Very Good
1,411 reviews
Check prices

Boarding

8.3

Entertainment

8.0

Food

7.8

Comfort

8.0

Crew

8.6

Overall

8.1

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
1,411 reviews
Check prices

Boarding

8.3

Entertainment

8.0

Food

7.8

Comfort

8.0

Crew

8.6

Overall

8.1

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, Hahn Air 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 £66, 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

Browse thousands of different options on Cheapflights for your next trip

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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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