Cheap flights from London to Southeast Asia from S$ 540

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 3-9. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BKK
6 Jul — 13 Jul1
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 6 June 2026.

Wed 11-1121:10
LHR
-
BKK
1 stop22h 05m
Shenzhen Airlines
Tue 1-1203:15
BKK
-
LHR
1 stop22h 55m
Shenzhen Airlines
Deal found 6-6S$ 806
Sat 14-1121:10
LHR
-
BKK
1 stop38h 20m
Shenzhen Airlines
Tue 17-1103:15
BKK
-
LHR
1 stop22h 55m
Shenzhen Airlines
Deal found 1-6S$ 807
Sun 8-1121:10
LHR
-
BKK
1 stop22h 05m
Shenzhen Airlines
Sun 22-1103:15
BKK
-
LHR
1 stop22h 55m
Shenzhen Airlines
Deal found 2-6S$ 809
Fri 20-1121:00
LHR
-
BKK
1 stop32h 20m
China Eastern
Sun 22-1115:55
BKK
-
LHR
2 stops32h 35m
China Eastern
Deal found 2-6S$ 901
Thu 12-1121:00
LHR
-
BKK
2 stops61h 15m
China Eastern
Sun 15-1121:05
BKK
-
LHR
3 stops51h 25m
China Eastern
Deal found 4-6S$ 909
Tue 27-1009:30
LHR
-
SIN
1 stop19h 20m
Gulf Air
Tue 10-1120:00
SIN
-
LHR
1 stop26h 45m
Gulf Air
Deal found 1-6S$ 912
Mon 14-921:20
LHR
-
BKK
1 stop18h 35m
China Eastern
Sun 1-1113:35
BKK
-
LHR
1 stop34h 55m
China Eastern
Deal found 5-6S$ 918
Thu 17-921:20
LHR
-
HKT
1 stop18h 40m
China Eastern
Fri 16-1000:05
HKT
-
LHR
1 stop24h 35m
China Eastern
Deal found 3-6S$ 920
Sun 1-1121:10
LHR
-
BKK
1 stop38h 20m
Shenzhen Airlines
Tue 10-1119:30
BKK
-
LHR
1 stop30h 40m
Shenzhen Airlines
Deal found 4-6S$ 920
Sun 1-1121:10
LHR
-
BKK
1 stop38h 20m
Shenzhen Airlines
Tue 24-1103:15
BKK
-
LHR
1 stop22h 55m
Shenzhen Airlines
Deal found 2-6S$ 921
Sun 1-1121:10
LHR
-
BKK
1 stop38h 20m
Shenzhen Airlines
Tue 17-1103:15
BKK
-
LHR
1 stop22h 55m
Shenzhen Airlines
Deal found 3-6S$ 923
Mon 12-1022:05
LHR
-
SIN
1 stop31h 40m
Gulf Air
Fri 23-1020:00
SIN
-
LHR
1 stop26h 20m
Gulf Air
Deal found 1-6S$ 924

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 6 June 2026.

Round-trip from

S$ 807

One-way from

S$ 540

Popular in

December

Cheapest in

September

Average price

S$ 951
Shenzhen Airlines
  • Shenzhen Airlines
  • 14-11-17-11
  • 2 total stops
  • 61h 15m total
  • London to Southeast Asia
China Eastern
  • China Eastern
  • 3-9
  • 1 total stop
  • 22h 35m total
  • London to Southeast Asia
Highest demand for flights based on searches. 5% potential increase in price (S$ 84 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (S$ 42 potential savings vs. average return price).
Average for round-trip flights in June 2026

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 6 June 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

Cheapest return flight

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Mon 26-10

21:10-02:15

1 stop22h 05m

Bangkok Suvarnabhumi

Sun 15-11

03:15-19:10

1 stop22h 55m

S$ 920

LondonSingapore

LGW - SIN

LGWSIN

London Gatwick

Wed 1-7

10:40-12:45

1 stop19h 05m

Singapore Changi

Thu 16-7

20:00-06:55

1 stop17h 55m

S$ 1,030

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Thu 3-12

21:00-00:55

1 stop20h 55m

Bangkok Suvarnabhumi

Sun 27-12

15:55-17:30

2 stops32h 35m

S$ 1,042

LondonSingapore

LGW - SIN

LGWSIN

London Gatwick

Tue 23-6

18:35-17:10

1 stop15h 35m

Singapore Changi

Mon 6-7

23:25-08:25

1 stop16h 00m

S$ 1,075

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Fri 19-6

14:45-06:40

1 stop33h 55m

Phuket City

Tue 30-6

03:20-18:45

1 stop21h 25m

S$ 1,076

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Wed 18-11

06:40-10:40

1 stop21h 00m

Bangkok Suvarnabhumi

Sun 29-11

12:35-09:35

2 stops28h 00m

S$ 1,086

LondonSingapore

LTN - SIN

LTNSIN

London Luton

Wed 17-6

07:15-17:55

2 stops27h 40m

Singapore Changi

Mon 22-6

23:05-14:35

2 stops22h 30m

S$ 1,102

LondonSingapore

LCY - SIN

LCYSIN

London City

Tue 1-12

19:05-18:05

1 stop15h 00m

Singapore Changi

Mon 7-12

00:05-08:40

1 stop16h 35m

S$ 1,102

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Tue 30-6

08:25-07:45

1 stop17h 20m

Phuket City

Tue 14-7

09:20-13:15

1 stop33h 55m

S$ 1,104

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sat 10-10

16:00-13:25

1 stop15h 25m

Bangkok Suvarnabhumi

Mon 26-10

08:15-17:25

1 stop16h 10m

S$ 1,117

Flights are sorted by cheapest return flights first.

Deals found on 4-6

Showing 1-10 of 60 resultsSorted by cheapest first
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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, September is the cheapest month in which you can book a flight from London to Southeast Asia (average of S$ 1,066). Flying from London to Southeast Asia in December is currently the most expensive (average of S$ 1,740). 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 6 June 2026.

One of the essential ways to save on airfare from London to Southeast Asia is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 9% on airfare.

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 6 June 2026.

The most flights from LON to zzYJX are scheduled on a Tuesday (11 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (9 on average).

How far ahead should I book a flight from London to Southeast Asia?

Booking 82 days in advance of your planned departure date is, on average, the best time to get cheap flights from London to Southeast Asia. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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 6 June 2026.
Read reviews from past customers who have flown with Singapore Airlines,SWISS, andAir China 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.

Comfort

8.0

Crew

8.6

Overall

8.2

Boarding

8.3

Food

7.8

Entertainment

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.

Comfort

8.0

Crew

8.6

Overall

8.2

Boarding

8.3

Food

7.8

Entertainment

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.

Comfort

8.0

Crew

8.6

Overall

8.2

Boarding

8.3

Food

7.8

Entertainment

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.

Comfort

8.0

Crew

8.6

Overall

8.2

Boarding

8.3

Food

7.8

Entertainment

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.

Comfort

8.0

Crew

8.6

Overall

8.2

Boarding

8.3

Food

7.8

Entertainment

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.

Comfort

8.0

Crew

8.6

Overall

8.2

Boarding

8.3

Food

7.8

Entertainment

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.

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$ 1,030, Shenzhen Airlines can have you in Southeast Asia from London in 19h 05m. The distance between London and Southeast Asia is about 10863 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 Air China (S$ 449), SWISS (S$ 452), and Gulf Air (S$ 506).

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

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

    Consider Thai Airways (92%), EVA Air (91%) or Air Canada (91%) 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$ 2,937, our data shows the cheapest flight currently is S$ 1,861. When looking at the most popular route, (London Heathrow - Singapore Changi), you can expect to pay S$ 721 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, September is the cheapest month in which you can book a flight from London to Southeast Asia (average of S$ 1,066). Flying from London to Southeast Asia in December is currently the most expensive (average of S$ 1,740). 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

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Alternative routes for London to Southeast Asia

See prices for flight routes from nearby airports that may be better suited for you.

Top 9 airlines flying from London to Southeast Asia

Discover the top 9 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 6 June 2026.
AirlineCheapestAverageFlexibilityOn-time
Hainan AirlinesCheapestS$ 698AverageS$ 858FlexibilityNo cancel feeOn-time61%
Search Hainan Airlines flights
Etihad AirwaysCheapestS$ 700AverageS$ 1,141FlexibilityNo cancel feeOn-time75%
Search Etihad Airways flights
Gulf AirCheapestS$ 807AverageS$ 967FlexibilityNo cancel feeOn-time67%
Search Gulf Air flights
SWISSCheapestS$ 836AverageS$ 2,059FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Singapore AirlinesCheapestS$ 954AverageS$ 1,521FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights
LufthansaCheapestS$ 962AverageS$ 1,705FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Qatar AirwaysCheapestS$ 1,086AverageS$ 1,185FlexibilityNo cancel feeOn-time68%
Search Qatar Airways flights
Qantas AirwaysCheapestS$ 1,141AverageS$ 1,839FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
British AirwaysCheapestS$ 1,326AverageS$ 1,612FlexibilityNo cancel feeOn-time70%
Search British Airways flights

Fly with Cheapflights

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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.

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