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Cheap flights from London to Southeast Asia from S$ 483

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 4-9. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BKK
20 Aug — 27 Aug1
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 21 July 2026.

Fri 2-1021:20
LHR
-
BKK
3 stops35h 35m
China Eastern
Sun 11-1020:50
BKK
-
LHR
2 stops51h 50m
China Eastern
Deal found 20-7S$ 825
Thu 12-1121:00
LHR
-
BKK
2 stops34h 55m
China Eastern
Sat 14-1101:55
BKK
-
LHR
1 stop22h 35m
China Eastern
Deal found 21-7S$ 834
Wed 4-1121:00
LHR
-
BKK
2 stops64h 10m
China Eastern
Sat 7-1101:55
BKK
-
LHR
1 stop22h 35m
China Eastern
Deal found 17-7S$ 838
Tue 29-921:20
LHR
-
BKK
1 stop22h 55m
China Eastern
Mon 12-1019:10
BKK
-
LHR
1 stop29h 30m
China Eastern
Deal found 19-7S$ 858
Sun 16-821:20
LHR
-
BKK
1 stop17h 35m
China Eastern
Tue 13-1019:10
BKK
-
LHR
1 stop29h 30m
China Eastern
Deal found 21-7S$ 860
Wed 30-921:20
LHR
-
BKK
1 stop18h 35m
China Eastern
Mon 12-1020:50
BKK
-
LHR
2 stops27h 50m
China Eastern
Deal found 20-7S$ 867
Wed 30-921:20
LHR
-
BKK
1 stop18h 35m
China Eastern
Tue 13-1003:00
BKK
-
LHR
2 stops21h 40m
China Eastern
Deal found 17-7S$ 873
Sun 1-1121:00
LHR
-
BKK
1 stop20h 55m
China Eastern
Sun 13-1219:55
BKK
-
LHR
1 stop28h 35m
China Eastern
Deal found 20-7S$ 875
Thu 26-1121:00
LHR
-
BKK
1 stop20h 55m
China Eastern
Sun 13-1219:55
BKK
-
LHR
1 stop28h 35m
China Eastern
Deal found 21-7S$ 876
Thu 13-821:20
LHR
-
HKT
2 stops38h 40m
China Eastern
Sat 15-800:05
HKT
-
LHR
1 stop24h 35m
China Eastern
Deal found 17-7S$ 989
Fri 18-921:20
LHR
-
HKT
1 stop18h 20m
China Eastern
Fri 2-1022:30
HKT
-
LHR
1 stop26h 10m
China Eastern
Deal found 17-7S$ 1,009
Thu 12-1109:30
LHR
-
SIN
1 stop19h 20m
Multiple Airlines
Sun 29-1119:25
SIN
-
LHR
1 stop19h 15m
Multiple Airlines
Deal found 21-7S$ 1,018

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 21 July 2026.

Round-trip from

S$ 825

One-way from

S$ 483

Popular in

December

Cheapest in

September

Average price

S$ 1,377
China Eastern
  • China Eastern
  • 2-10-11-10
  • 4 total stops
  • 84h 50m total
  • London to Southeast Asia
Search Deals
Air China
  • Air China
  • 4-9
  • 1 total stop
  • 37h 05m total
  • London to Southeast Asia
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (S$ 99 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (S$ 46 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 21 July 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

Fri 18-9

21:20-14:55

2 stops35h 35m

Bangkok Suvarnabhumi

Sun 11-10

21:55-18:40

1 stop26h 45m

S$ 886

LondonSingapore

LTN - SIN

LTNSIN

London Luton

Thu 1-10

15:50-21:15

2 stops22h 25m

Singapore Changi

Tue 6-10

03:15-19:55

2 stops23h 40m

S$ 1,020

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Sun 20-9

21:45-23:50

1 stop20h 05m

Phuket City

Mon 5-10

15:20-18:45

1 stop33h 25m

S$ 1,025

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Sun 22-11

18:45-16:05

Nonstop13h 20m

Singapore Changi

Mon 30-11

23:15-05:45

Nonstop14h 30m

S$ 1,038

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Tue 8-9

19:25-16:10

Nonstop13h 45m

Singapore Changi

Wed 16-9

23:25-06:35

Nonstop14h 10m

S$ 1,038

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Wed 4-11

18:45-16:05

Nonstop13h 20m

Singapore Changi

Sun 8-11

23:15-05:45

Nonstop14h 30m

S$ 1,038

LondonSingapore

LCY - SIN

LCYSIN

London City

Wed 4-11

17:45-18:05

1 stop16h 20m

Singapore Changi

Mon 16-11

00:05-08:40

1 stop16h 35m

S$ 1,039

LondonSingapore

LCY - SIN

LCYSIN

London City

Tue 13-10

18:05-17:10

1 stop16h 05m

Singapore Changi

Mon 26-10

00:05-08:40

1 stop16h 35m

S$ 1,039

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Fri 20-11

21:00-19:35

2 stops39h 35m

Phuket City

Tue 24-11

23:05-17:30

1 stop25h 25m

S$ 1,039

LondonPhuket City

LHR - HKT

LHRHKT

London Heathrow

Thu 13-8

21:20-21:40

1 stop18h 20m

Phuket City

Mon 17-8

18:50-18:40

2 stops29h 50m

S$ 1,042

Flights are sorted by cheapest return flights first.

Deals found on 17-7

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, November is the cheapest month in which you can book a flight from London to Southeast Asia (average of S$ 1,061). Flying from London to Southeast Asia in December is currently the most expensive (average of S$ 1,766). 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 21 July 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 16% 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 21 July 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 50 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 21 July 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.
Singapore Airlines
8.2
Very Good
1,576 reviews
Check prices

Boarding

8.3

Crew

8.6

Comfort

8.0

Food

7.8

Entertainment

8.1

Overall

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered
Singapore Airlines
8.2
Very Good
1,576 reviews
Singapore Airlines
8.2
Very Good
1,576 reviews
Check prices

Boarding

8.3

Crew

8.6

Comfort

8.0

Food

7.8

Entertainment

8.1

Overall

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered
SWISS
7.5
Good
2,013 reviews
Singapore Airlines
8.2
Very Good
1,576 reviews
Check prices

Boarding

8.3

Crew

8.6

Comfort

8.0

Food

7.8

Entertainment

8.1

Overall

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered
Air China
7.4
Good
156 reviews
Singapore Airlines
8.2
Very Good
1,576 reviews
Check prices

Boarding

8.3

Crew

8.6

Comfort

8.0

Food

7.8

Entertainment

8.1

Overall

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered
Gulf Air
7.2
Good
237 reviews
Singapore Airlines
8.2
Very Good
1,576 reviews
Check prices

Boarding

8.3

Crew

8.6

Comfort

8.0

Food

7.8

Entertainment

8.1

Overall

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered
Lufthansa
6.8
Okay
8,152 reviews
Singapore Airlines
8.2
Very Good
1,576 reviews
Check prices

Boarding

8.3

Crew

8.6

Comfort

8.0

Food

7.8

Entertainment

8.1

Overall

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

DAD - SIN

Person in front laid back his seat. I’m quite tall found it difficult to sit straight lucky seat next to me was empty was able to stretch my legs. Eating my meal was difficult also as seat remained lowered

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$ 1,031, China Eastern can have you in Southeast Asia from London in 18h 15m. 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 Lufthansa (S$ 428), Air China (S$ 450), and SWISS (S$ 453).

  • 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 Stansted - Singapore Changi.

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

    Consider EVA Air (91%), Thai Airways (91%) or Air Canada (87%) 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$ 2,522, our data shows the cheapest flight currently is S$ 1,003. When looking at the most popular route, (London Heathrow - Singapore Changi), you can expect to pay S$ 722 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$ 1,061). Flying from London to Southeast Asia in December is currently the most expensive (average of S$ 1,766). 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.
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 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 21 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Qatar AirwaysCheapestS$ 449AverageS$ 1,150FlexibilityNo cancel feeOn-time68%
Search Qatar Airways flights
Etihad AirwaysCheapestS$ 664AverageS$ 1,087FlexibilityNo cancel feeOn-time75%
Search Etihad Airways flights
Hainan AirlinesCheapestS$ 700AverageS$ 861FlexibilityNo cancel feeOn-time61%
Search Hainan Airlines flights
Gulf AirCheapestS$ 809AverageS$ 970FlexibilityNo cancel feeOn-time67%
Search Gulf Air flights
SWISSCheapestS$ 811AverageS$ 2,237FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Singapore AirlinesCheapestS$ 957AverageS$ 1,492FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights
LufthansaCheapestS$ 965AverageS$ 1,710FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
British AirwaysCheapestS$ 1,090AverageS$ 1,442FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Qantas AirwaysCheapestS$ 1,144AverageS$ 1,388FlexibilityNo 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.

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