Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from London to Southeast Asia from S$ 493

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 10-3. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BKK
4 Apr — 11 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to Southeast Asia

Enter your travel dates to find the best prices.

Cheapest flights from London to Southeast Asia
Explore the most affordable flight options available from London to Southeast Asia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 March 2026.

Sun 15-321:00
LHR
-
BKK
2 stops21h 15m
China Eastern
Thu 26-316:50
BKK
-
LHR
1 stop31h 40m
China Eastern
Deal found 28-2S$ 722
Sun 8-321:00
LHR
-
BKK
1 stop18h 25m
China Eastern
Mon 23-321:05
BKK
-
LHR
2 stops27h 25m
China Eastern
Deal found 1-3S$ 724
Mon 16-321:10
LHR
-
BKK
1 stop22h 05m
Shenzhen Airlines
Thu 21-512:10
BKK
-
LHR
1 stop37h 50m
Shenzhen Airlines
Deal found 4-3S$ 727
Sat 2-521:20
LHR
-
BKK
1 stop22h 35m
China Eastern
Mon 18-502:10
BKK
-
LHR
1 stop22h 30m
China Eastern
Deal found 4-3S$ 729
Wed 11-321:10
LHR
-
BKK
1 stop38h 20m
Shenzhen Airlines
Sat 2-519:30
BKK
-
LHR
1 stop30h 30m
Shenzhen Airlines
Deal found 3-3S$ 730
Tue 26-521:20
LHR
-
BKK
1 stop17h 35m
China Eastern
Wed 3-605:05
BKK
-
LHR
1 stop19h 35m
China Eastern
Deal found 3-3S$ 731
Sun 10-521:20
LHR
-
BKK
1 stop18h 35m
China Eastern
Sun 17-521:55
BKK
-
LHR
1 stop26h 45m
China Eastern
Deal found 3-3S$ 732
Tue 5-521:20
LHR
-
BKK
1 stop17h 35m
China Eastern
Sun 17-521:55
BKK
-
LHR
1 stop26h 45m
China Eastern
Deal found 2-3S$ 734
Wed 13-521:20
LHR
-
BKK
1 stop17h 35m
China Eastern
Wed 20-502:10
BKK
-
LHR
1 stop22h 30m
China Eastern
Deal found 2-3S$ 735
Wed 11-321:10
LHR
-
BKK
1 stop38h 20m
Shenzhen Airlines
Thu 7-512:10
BKK
-
LHR
1 stop37h 50m
Shenzhen Airlines
Deal found 2-3S$ 736
Wed 8-421:20
LHR
-
BKK
1 stop22h 35m
China Eastern
Wed 13-503:00
BKK
-
LHR
2 stops21h 40m
China Eastern
Deal found 4-3S$ 739
Thu 7-521:20
LHR
-
BKK
1 stop18h 35m
China Eastern
Tue 26-503:00
BKK
-
LHR
2 stops21h 40m
China Eastern
Deal found 3-3S$ 740

Find flight deals from London to Southeast Asia

Keep the following information in mind while searching for London to Southeast Asia flight deals. Data was last updated 5 March 2026.

Round-trip from

S$ 722

One-way from

S$ 493

Popular in

July

Cheapest in

May

Average price

S$ 1,062
China Eastern
  • China Eastern
  • 15-3-25-3
  • 3 total stops
  • 40h 40m total
  • London to Southeast Asia
Search Deals
China Eastern
  • China Eastern
  • 10-3
  • 1 total stop
  • 18h 45m total
  • London to Southeast Asia
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (S$ 184 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (S$ 41 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from London to Southeast Asia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 200,618 searches. Data last updated 5 March 2026.
Use the filters below to find and compare flights from London to Southeast Asia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Fri 8-5

22:05-11:10

1 stop31h 05m

Bangkok Suvarnabhumi

Sun 7-6

03:15-19:50

1 stop22h 35m

S$ 750

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sun 7-6

22:05-11:10

1 stop31h 05m

Bangkok Suvarnabhumi

Thu 25-6

19:30-20:00

1 stop30h 30m

S$ 755

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Mon 20-4

20:50-19:00

1 stop16h 10m

Phuket City

Sun 10-5

21:00-06:30

1 stop15h 30m

S$ 836

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Thu 16-4

20:50-19:55

1 stop17h 05m

Phuket City

Sun 3-5

09:10-06:30

1 stop27h 20m

S$ 841

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Sun 3-5

21:20-22:00

1 stop18h 40m

Phuket City

Wed 13-5

00:05-18:40

1 stop24h 35m

S$ 846

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Tue 12-5

21:20-22:45

1 stop19h 25m

Phuket City

Tue 19-5

18:55-18:40

2 stops53h 45m

S$ 855

LondonSingapore

LTN - SIN

LTNSIN

London Luton

Wed 6-5

06:15-17:25

3 stops28h 10m

Singapore Changi

Wed 20-5

20:00-11:50

2 stops22h 50m

S$ 896

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Tue 19-5

21:20-15:35

1 stop35h 15m

Singapore Changi

Tue 26-5

12:20-18:40

3 stops61h 20m

S$ 911

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Thu 23-4

18:40-17:10

1 stop15h 30m

Singapore Changi

Wed 6-5

23:25-13:40

2 stops21h 15m

S$ 915

LondonSingapore

STN - SIN

STNSIN

London Stansted

Tue 21-4

17:35-08:45

1 stop32h 10m

Singapore Changi

Wed 29-4

11:10-16:40

1 stop36h 30m

S$ 928

Flights are sorted by cheapest return flights first.

Deals found on 2-3

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

Best time to book a flight from London to Southeast Asia

Have a flexible travel schedule? Discover the best time to fly to Southeast Asia from London 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 from London to Southeast Asia

What is the cheapest month to book a flight from London to Southeast Asia?

Currently, November is the cheapest month in which you can book a flight from London to Southeast Asia (average of S$ 519). Flying from London to Southeast Asia in July is currently the most expensive (average of S$ 827). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from LON to YJX?

Find hourly flight availability from London to Southeast Asia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 5 March 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London to Southeast Asia as you normally would.

Weekly flight availability from London to Southeast Asia

Explore weekly flight availability from London to Southeast Asia. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 5 March 2026.

The most flights from LON to zzYJX 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).

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 March 2026.
Read reviews from past customers who have flown with Singapore Airlines, Air China, andGulf Air from London to Southeast Asia. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Singapore Airlines
8.2
Very Good
1,468 reviews
Check prices

Boarding

8.3

Comfort

8.0

Overall

8.2

Crew

8.6

Food

7.8

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
8.2
Very Good
1,468 reviews
Singapore Airlines
8.2
Very Good
1,468 reviews
Check prices

Boarding

8.3

Comfort

8.0

Overall

8.2

Crew

8.6

Food

7.8

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
139 reviews
Singapore Airlines
8.2
Very Good
1,468 reviews
Check prices

Boarding

8.3

Comfort

8.0

Overall

8.2

Crew

8.6

Food

7.8

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.
Gulf Air
7.2
Good
231 reviews
Singapore Airlines
8.2
Very Good
1,468 reviews
Check prices

Boarding

8.3

Comfort

8.0

Overall

8.2

Crew

8.6

Food

7.8

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.
Lufthansa
6.8
Okay
7,828 reviews
Singapore Airlines
8.2
Very Good
1,468 reviews
Check prices

Boarding

8.3

Comfort

8.0

Overall

8.2

Crew

8.6

Food

7.8

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.
British Airways
6.7
Okay
7,775 reviews
Singapore Airlines
8.2
Very Good
1,468 reviews
Check prices

Boarding

8.3

Comfort

8.0

Overall

8.2

Crew

8.6

Food

7.8

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.

Related info for your journey

Find useful and relevant information for your journey from London to Southeast Asia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from London to Southeast Asia?

    For as low as S$ 833, Air India can have you in Southeast Asia from London in 16h 40m. The distance between London and Southeast Asia is about 9571 km. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from London to Southeast Asia one-way?

    The cheapet airlines for a one-way flight from London to Southeast Asia are Lufthansa (S$ 423), SWISS (S$ 440), and Air China (S$ 445).

  • What are the most popular routes from London to Southeast Asia?

    The most popular flight routes from London to Southeast Asia are London Heathrow - Singapore Changi, London Gatwick - Singapore Changi and London City - Singapore Changi.

  • What are the most reliable airlines from London to Southeast Asia?

    Consider Thai Airways (88%), Air Canada (85%) or EVA Air (85%) when booking your flight. These represent the most reliable airlines when flying from London to Southeast Asia.

  • What are the cheapest flights from London to Southeast Asia?

    While on average a flight from London to Southeast Asia is generally S$ 3,980, our data shows the cheapest flight currently is S$ 3,968. When looking at the most popular route, (London Heathrow - Singapore Changi), you can expect to pay S$ 683 for that flight.

  • Can I find deals for flights from London to Southeast Asia that include hotel bookings?

    Yes. In addition to deals on London to Southeast Asia flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from London to Southeast Asia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Southeast Asia.

  • Can I find deals for business class flights from London to Southeast Asia?

    Yes. Cheapflights offers flight deals from London to Southeast Asia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from London to Southeast Asia?

    Currently, November is the cheapest month in which you can book a flight from London to Southeast Asia (average of S$ 519). Flying from London to Southeast Asia in July is currently the most expensive (average of S$ 827). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for London to Southeast Asia

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Singapore flights
Gatwick to Singapore flights
Manchester to Singapore flights
Edinburgh to Singapore flights
Birmingham to Singapore flights
Newcastle upon Tyne to Singapore flights

Top 8 airlines flying from London to Southeast Asia

Discover the top 8 airlines that operate flights from London to Southeast Asia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 200,618 searches. Data last updated 5 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Hainan AirlinesCheapestS$ 692AverageS$ 851FlexibilityNo cancel feeOn-time61%
Search Hainan Airlines flights
Etihad AirwaysCheapestS$ 694AverageS$ 1,137FlexibilityNo cancel feeOn-time75%
Search Etihad Airways flights
British AirwaysCheapestS$ 771AverageS$ 1,360FlexibilityNo cancel feeOn-time70%
Search British Airways flights
SWISSCheapestS$ 801AverageS$ 2,118FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Gulf AirCheapestS$ 812AverageS$ 959FlexibilityNo cancel feeOn-time67%
Search Gulf Air flights
Singapore AirlinesCheapestS$ 946AverageS$ 1,508FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights
LufthansaCheapestS$ 954AverageS$ 1,691FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Qantas AirwaysCheapestS$ 1,131AverageS$ 1,618FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from London to Southeast Asia?

When you search for this flight from London to Southeast Asia, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from London to Southeast Asia.

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

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

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

Yes! Start tracking prices for London to Southeast Asia flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book With Flexibility

Our users can plan ahead with confidence and find flights with no change fees.

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.