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Cheap flights from London to Southeast Asia from S$ 400

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 9-5. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BKK
21 Apr — 28 Apr1
1 adult

Cheap 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 16 April 2025.

Round-trip from

S$ 710

One-way from

S$ 400

Popular in

December

Cheapest in

May

Average price

S$ 1,222
Shenzhen Airlines
  • Shenzhen Airlines
  • 18-6-26-6
  • 2 total stops
  • 44h 55m total
  • London to Southeast Asia
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9-5
  • 9-5
  • 2 total stops
  • 46h 15m total
  • London to Southeast Asia
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (S$ 130 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (S$ 51 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2025
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Find flight deals from London to Southeast Asia

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 16 April 2025.

Wed 18-622:05LHR - SIN
1 stop21h 35mShenzhen Airlines
Fri 27-603:40SIN - LHR
1 stop23h 10mShenzhen Airlines
Deal found 15-4S$ 710
Sat 3-522:10LHR - BKK
1 stop34h 20mChina Southern
Mon 19-503:00BKK - LHR
1 stop22h 00mChina Southern
Deal found 15-4S$ 732
Tue 4-1109:30LHR - SIN
1 stop19h 00mGulf Air
Wed 19-1120:25SIN - LHR
1 stop18h 10mGulf Air
Deal found 15-4S$ 739
Wed 7-522:05LHR - BKK
1 stop22h 10mShenzhen Airlines
Thu 15-519:30BKK - LHR
1 stop30h 30mShenzhen Airlines
Deal found 15-4S$ 751
Thu 1-518:00LGW - SIN
1 stop20h 55mChina Eastern
Thu 15-518:10SIN - LGW
1 stop28h 00mChina Eastern
Deal found 15-4S$ 755
Mon 16-621:45LHR - SIN
1 stop28h 55mEtihad Airways
Wed 16-721:10SIN - LHR
1 stop16h 50mEtihad Airways
Deal found 15-4S$ 768
Sun 4-511:25LGW - SIN
1 stop17h 55mGulf Air
Tue 13-520:00SIN - LGW
1 stop17h 55mGulf Air
Deal found 15-4S$ 768
Thu 1-521:20LHR - BKK
1 stop17h 35mChina Eastern
Tue 13-502:10BKK - LHR
1 stop22h 30mChina Eastern
Deal found 15-4S$ 786
Thu 1-522:00LHR - SIN
1 stop34h 00mAir China
Thu 15-509:00SIN - LHR
1 stop18h 30mAir China
Deal found 15-4S$ 787
Thu 8-515:50STN - SIN
1 stop27h 20mMultiple Airlines
Wed 14-503:45SIN - STN
2 stops34h 05mMultiple Airlines
Deal found 15-4S$ 791
Sun 4-521:20LHR - SIN
1 stop25h 05mChina Eastern
Mon 12-500:55SIN - LHR
1 stop24h 45mChina Eastern
Deal found 15-4S$ 805
Thu 8-521:00LHR - SIN
2 stops57h 25mChina Southern
Wed 14-503:55SIN - LHR
1 stop22h 05mChina Southern
Deal found 15-4S$ 812

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 16 April 2025.
Use the filters below to find and compare flights from London to Southeast Asia that are best for you.

Fly from

London

Fly to

Southeast Asia

Route

Depart

Return

Price

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Wed 18-6

22:05-02:40

1 stop21h 35m

Singapore Changi

Fri 27-6

03:40-19:50

1 stop23h 10m

S$ 710

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sat 3-5

22:10-14:30

1 stop34h 20m

Bangkok Suvarnabhumi

Mon 19-5

03:00-19:00

1 stop22h 00m

S$ 732

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Wed 7-5

22:05-02:15

1 stop22h 10m

Bangkok Suvarnabhumi

Thu 15-5

19:30-20:00

1 stop30h 30m

S$ 751

LondonSingapore

LGW - SIN

LGWSIN

London Gatwick

Thu 1-5

18:00-21:55

1 stop20h 55m

Singapore Changi

Thu 15-5

18:10-15:10

1 stop28h 00m

S$ 755

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Mon 16-6

21:45-09:40

1 stop28h 55m

Singapore Changi

Wed 16-7

21:10-07:00

1 stop16h 50m

S$ 768

LondonSingapore

LGW - SIN

LGWSIN

London Gatwick

Sun 4-5

11:25-12:20

1 stop17h 55m

Singapore Changi

Tue 13-5

20:00-06:55

1 stop17h 55m

S$ 768

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Tue 6-5

22:05-12:20

1 stop31h 15m

Singapore Changi

Tue 13-5

20:00-06:55

1 stop17h 55m

S$ 769

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Sat 3-5

20:25-03:10

2 stops24h 45m

Bangkok Suvarnabhumi

Tue 20-5

04:10-20:30

2 stops22h 20m

S$ 774

LondonBangkok

LHR - BKK

LHRBKK

London Heathrow

Thu 1-5

21:20-20:55

1 stop17h 35m

Bangkok Suvarnabhumi

Tue 13-5

02:10-18:40

1 stop22h 30m

S$ 786

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Thu 1-5

22:00-15:00

1 stop34h 00m

Singapore Changi

Thu 15-5

09:00-20:30

1 stop18h 30m

S$ 787

Flights are sorted by cheapest return flights first.

Deals found on 15-4

Showing 1-10 of 60 results
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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, January is the cheapest month in which you can book a flight from London to Southeast Asia (average of S$ 134). Flying from London to Southeast Asia in December is currently the most expensive (average of S$ 231). 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 16 April 2025.

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 16 April 2025.

The most flights from LON to zzYJX are scheduled on a Monday (9 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (7 on average).

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 April 2025.
See what other customers who have flown with EVA Air, China Airlines and Hainan Airlines from London to Southeast Asia have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very Good
1,176 reviews
Check prices

Entertainment

8.0

Food

8.1

Boarding

8.4

Overall

8.4

Crew

8.6

Comfort

8.3

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
EVA Air
8.4
Very Good
1,176 reviews
EVA Air
8.4
Very Good
1,176 reviews
Check prices

Entertainment

8.0

Food

8.1

Boarding

8.4

Overall

8.4

Crew

8.6

Comfort

8.3

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
China Airlines
8.2
Very Good
729 reviews
EVA Air
8.4
Very Good
1,176 reviews
Check prices

Entertainment

8.0

Food

8.1

Boarding

8.4

Overall

8.4

Crew

8.6

Comfort

8.3

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
Hainan Airlines
8.1
Very Good
37 reviews
EVA Air
8.4
Very Good
1,176 reviews
Check prices

Entertainment

8.0

Food

8.1

Boarding

8.4

Overall

8.4

Crew

8.6

Comfort

8.3

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
Garuda Indonesia
8.1
Very Good
71 reviews
EVA Air
8.4
Very Good
1,176 reviews
Check prices

Entertainment

8.0

Food

8.1

Boarding

8.4

Overall

8.4

Crew

8.6

Comfort

8.3

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.

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.

  • 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 Gulf Air (S$ 482), China Eastern (S$ 494), and Air India (S$ 499).

  • 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 Air Canada (68%), Thai Airways (66%) or EVA Air (62%) 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$ 1,077, our data shows the cheapest flight currently is S$ 1,076. When looking at the most popular route, (London Heathrow - Singapore Changi), you can expect to pay S$ 701 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, January is the cheapest month in which you can book a flight from London to Southeast Asia (average of S$ 134). Flying from London to Southeast Asia in December is currently the most expensive (average of S$ 231). 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
Birmingham to Singapore flights
Edinburgh 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 16 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Etihad AirwaysCheapestS$ 830AverageS$ 1,084FlexibilityNo cancel feeOn-time75%
Search Etihad Airways flights
Air FranceCheapestS$ 849AverageS$ 2,000FlexibilityNo cancel feeOn-time77%
Search Air France flights
Gulf AirCheapestS$ 866AverageS$ 1,089FlexibilityNo cancel feeOn-time67%
Search Gulf Air flights
British AirwaysCheapestS$ 919AverageS$ 1,185FlexibilityNo cancel feeOn-time70%
Search British Airways flights
FinnairCheapestS$ 951AverageS$ 1,018FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Singapore AirlinesCheapestS$ 954AverageS$ 1,311FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights
SWISSCheapestS$ 970AverageS$ 1,368FlexibilityNo cancel feeOn-time79%
Search SWISS flights
LufthansaCheapestS$ 1,233AverageS$ 1,813FlexibilityNo cancel feeOn-time76%
Search Lufthansa 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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