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Cheap flights from London to Southeast Asia from $622

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 7/12. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BKK
26 Dec — 2 Jan1
1 adult
1 adult, Economy, 0 bags

Find 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 26 November 2025.

Wed 26/1109:30LHR - SIN
1 stop19h 00mGulf Air
Tue 9/1220:00SIN - LHR
1 stop18h 35mGulf Air
Deal found 22/11$1,057
Thu 4/1209:30LHR - SIN
1 stop19h 00mGulf Air
Thu 26/220:00SIN - LHR
1 stop26h 45mGulf Air
Deal found 25/11$1,076
Fri 28/1110:00LHR - SIN
1 stop22h 15mKLM
Tue 9/1201:40SIN - LHR
1 stop17h 05mKLM
Deal found 25/11$1,108
Wed 3/1221:50LHR - SIN
1 stop30h 40mGulf Air
Sun 1/320:00SIN - LHR
1 stop26h 45mGulf Air
Deal found 25/11$1,116
Mon 1/1216:35LHR - SIN
1 stop17h 00mTurkish Airlines
Wed 10/1211:40SIN - LHR
1 stop18h 45mTurkish Airlines
Deal found 24/11$1,118
Tue 25/1117:05LHR - SIN
2 stops17h 30mMultiple Airlines
Fri 5/1210:55SIN - LHR
1 stop18h 30mMultiple Airlines
Deal found 25/11$1,125
Tue 9/1207:30LHR - SIN
1 stop27h 10mFinnair
Mon 29/1222:05SIN - LHR
1 stop26h 55mFinnair
Deal found 23/11$1,130
Sun 28/1221:10LHR - SIN
1 stop31h 00mShenzhen Airlines
Fri 16/118:30SIN - LHR
1 stop32h 40mShenzhen Airlines
Deal found 25/11$1,135
Wed 31/1221:10LHR - SIN
1 stop31h 00mShenzhen Airlines
Sun 18/118:30SIN - LHR
1 stop32h 40mShenzhen Airlines
Deal found 24/11$1,136
Mon 8/1217:05LHR - SIN
1 stop15h 10mKLM
Mon 22/1201:40SIN - LHR
1 stop20h 10mKLM
Deal found 24/11$1,150
Fri 5/1209:30LHR - SIN
1 stop19h 00mGulf Air
Tue 3/320:00SIN - LHR
1 stop18h 35mGulf Air
Deal found 25/11$1,162
Tue 2/1217:05LCY - KUL
1 stop14h 35mKLM
Tue 27/123:50KUL - LCY
1 stop16h 20mKLM
Deal found 25/11$1,217

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 26 November 2025.

Round-trip from

$1,000

One-way from

$622

Popular in

December

Cheapest in

May

Average price

$1,234
9/2-15/2
  • 9/2-15/2
  • 5 total stops
  • 54h 30m total
  • London to Southeast Asia
Search Deals
7/12
  • 7/12
  • 2 total stops
  • 46h 55m total
  • London to Southeast Asia
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($192 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($68 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
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 647,157 searches. Data last updated 26 November 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 3/12

21:50-12:30

1 stop30h 40m

Singapore Changi

Wed 4/3

20:00-14:45

1 stop26h 45m

$1,076

LondonPhuket City

LTN - HKT

LTNHKT

London Luton

Thu 8/1

06:15-21:45

2 stops32h 30m

Phuket City

Thu 15/1

11:05-23:10

3 stops43h 05m

$1,093

LondonDenpasar

LCY - DPS

LCYDPS

London City

Fri 8/5

19:20-00:05

2 stops21h 45m

Denpasar Bali Ngurah Rai

Tue 19/5

13:05-12:30

2 stops30h 25m

$1,119

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Wed 21/1

14:25-18:00

2 stops19h 35m

Singapore Changi

Tue 27/1

00:05-13:40

2 stops21h 35m

$1,166

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Tue 27/1

17:10-18:00

1 stop16h 50m

Singapore Changi

Mon 23/2

00:05-13:40

2 stops21h 35m

$1,170

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Thu 12/2

14:25-18:00

2 stops19h 35m

Singapore Changi

Mon 23/3

00:05-13:40

2 stops21h 35m

$1,196

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Wed 21/1

14:25-18:00

2 stops19h 35m

Singapore Changi

Sun 8/2

00:05-13:40

2 stops21h 35m

$1,212

LondonDenpasar

LCY - DPS

LCYDPS

London City

Sun 10/5

19:20-00:05

2 stops21h 45m

Denpasar Bali Ngurah Rai

Wed 20/5

13:05-08:50

2 stops26h 45m

$1,241

LondonDenpasar

LTN - DPS

LTNDPS

London Luton

Mon 9/2

07:15-22:50

2 stops31h 35m

Denpasar Bali Ngurah Rai

Sun 15/2

19:15-22:40

3 stops35h 25m

$1,244

LondonPhuket City

LTN - HKT

LTNHKT

London Luton

Mon 9/2

06:30-10:05

2 stops20h 35m

Phuket City

Sun 15/2

22:50-15:05

2 stops23h 15m

$1,260

Flights are sorted by cheapest return flights first.

Deals found on 24/11

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, May is the cheapest month in which you can book a flight from London to Southeast Asia (average of $698). Flying from London to Southeast Asia in July is currently the most expensive (average of $1,068). 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 26 November 2025.

When flying from London to Southeast Asia, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 26% versus a flight in the evening.

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 26 November 2025.

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 26 November 2025.
See what other customers who have flown with Singapore Airlines from London to Southeast Asia have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Singapore Airlines
8.1
Very Good
1,409 reviews
Check prices

Comfort

8.0

Boarding

8.3

Overall

8.1

Entertainment

8.0

Food

7.8

Crew

8.6

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
1,409 reviews
Singapore Airlines
8.1
Very Good
1,409 reviews
Check prices

Comfort

8.0

Boarding

8.3

Overall

8.1

Entertainment

8.0

Food

7.8

Crew

8.6

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?

    Gulf Air, SWISS, and Turkish Airlines can get you from London to Southeast Asia in just under 21h 45m. Your travel time can differ by up to 9h 40m. Airlines will cover a distance of 12484 km. Both multi-stop and direct flights can be found to your destination and back.

  • 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 ($661), Shenzhen Airlines ($672), and SWISS ($792).

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

    While some choose either London Stansted - Denpasar Bali Ngurah Rai or London City - Phuket City, London City - Denpasar Bali Ngurah Rai is the most popular route from London to Southeast Asia.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from London to Southeast Asia on time: EVA Air (85%), Thai Airways (82%), Air Canada (78%).

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

    On average you can expect to pay $2,295 for a flight from London to Southeast Asia. The cheapest flight overall is $1,505 while the most popular route, (London City - Denpasar Bali Ngurah Rai) is currently priced at $944.

  • 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, May is the cheapest month in which you can book a flight from London to Southeast Asia (average of $698). Flying from London to Southeast Asia in July is currently the most expensive (average of $1,068). 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

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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
Heathrow to Suvarnabhumi flights
Gatwick to Suvarnabhumi flights

Top 2 airlines flying from London to Southeast Asia

Discover the top 2 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 647,157 searches. Data last updated 26 November 2025.
AirlineCheapestAverageFlexibilityOn-time
Etihad AirwaysCheapest$1,089Average$1,455FlexibilityNo cancel feeOn-time75%
Search Etihad Airways flights
Thai AirwaysCheapest$1,195Average$1,240FlexibilityNo cancel feeOn-time77%
Search Thai 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?

Cheapflights helps you find that perfect flight to Southeast Asia from London by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Yes! Cheapflights helps users easily find flights from London to Southeast Asia with no change fees.

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

Not ready to book yet? You can track prices for flights from London to Southeast Asia on Cheapflights with our Price Alert feature and get notified when better prices are available.

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