Find flights
When to book
Airlines
FAQs

Cheap flights from London to Southeast Asia from $657

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 28/9. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BKK
15 Jul — 22 Jul1
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 10 July 2025.

Round-trip from

$1,235

One-way from

$657

Popular in

December

Cheapest in

May

Average price

$1,716
KLM
  • KLM
  • 19/11-24/11
  • 2 total stops
  • 37h 10m total
  • London to Southeast Asia
28/9
  • 28/9
  • 2 total stops
  • 31h 05m total
  • London to Southeast Asia
Highest demand for flights based on searches. 8% potential increase in price ($183 potential increase over avg. return price).
Cheapest flight prices on average. 3% potential price decrease ($71 potential savings vs. average return price).
Average for round-trip flights in July 2025

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 10 July 2025.

Wed 19/1110:00LCY - KUL
1 stop21h 45mKLM
Mon 24/1123:50KUL - LCY
1 stop15h 25mKLM
Deal found 8/7$1,235
Wed 17/910:00LCY - HKT
2 stops22h 05mKLM
Wed 1/1007:35HKT - LCY
2 stops29h 40mKLM
Deal found 8/7$1,292
Tue 28/1019:10LCY - DPS
2 stops20h 45mSWISS
Wed 12/1113:00DPS - LCY
2 stops27h 35mSWISS
Deal found 8/7$1,310
Tue 4/1119:10LCY - KUL
2 stops29h 00mSWISS
Tue 18/1120:30KUL - LCY
2 stops24h 20mSWISS
Deal found 8/7$1,332
Thu 20/1109:20LCY - DPS
1 stop27h 00mKLM
Sun 18/121:40DPS - LCY
2 stops26h 55mKLM
Deal found 9/7$1,391
Tue 2/1219:10LCY - KUL
2 stops17h 30mMultiple Airlines
Tue 27/121:45KUL - LCY
2 stops19h 30mMultiple Airlines
Deal found 9/7$1,391
Tue 4/1114:05STN - KUL
1 stop16h 40mEmirates
Tue 25/1110:15KUL - STN
1 stop15h 45mEmirates
Deal found 9/7$1,413
Tue 16/907:40LTN - DPS
2 stops43h 10mMultiple Airlines
Sat 11/1019:40DPS - LTN
2 stops34h 50mMultiple Airlines
Deal found 8/7$1,425
Tue 12/814:35LTN - HKT
2 stops35h 20mMultiple Airlines
Tue 19/808:45HKT - LTN
2 stops19h 25mMultiple Airlines
Deal found 8/7$1,515
Tue 25/1119:10LCY - HKT
1 stop33h 15mSWISS
Tue 2/1221:50HKT - LCY
2 stops46h 00mSWISS
Deal found 8/7$1,589
Sun 14/914:55STN - HKT
2 stops21h 35mEmirates
Mon 6/1019:10HKT - STN
2 stops29h 35mEmirates
Deal found 9/7$1,612
Tue 23/907:40LTN - KUL
2 stops39h 20mMultiple Airlines
Sat 27/919:15KUL - LTN
2 stops35h 15mMultiple Airlines
Deal found 9/7$1,623

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 10 July 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

LondonKuala Lumpur

LCY - KUL

LCYKUL

London City

Wed 19/11

10:00-15:45

1 stop21h 45m

Kuala Lumpur Intl

Mon 24/11

23:50-07:15

1 stop15h 25m

$1,235

LondonPhuket City

LCY - HKT

LCYHKT

London City

Wed 17/9

10:00-14:05

2 stops22h 05m

Phuket City

Wed 1/10

07:35-07:15

2 stops29h 40m

$1,292

LondonDenpasar

LCY - DPS

LCYDPS

London City

Tue 28/10

19:10-23:55

2 stops20h 45m

Denpasar Bali Ngurah Rai

Wed 12/11

13:00-08:35

2 stops27h 35m

$1,310

LondonKuala Lumpur

LCY - KUL

LCYKUL

London City

Tue 4/11

19:10-08:10

2 stops29h 00m

Kuala Lumpur Intl

Tue 18/11

20:30-12:50

2 stops24h 20m

$1,332

LondonKuala Lumpur

LCY - KUL

LCYKUL

London City

Tue 2/12

19:10-20:40

2 stops17h 30m

Kuala Lumpur Intl

Tue 27/1

21:45-09:15

2 stops19h 30m

$1,391

LondonDenpasar

LCY - DPS

LCYDPS

London City

Thu 20/11

09:20-20:20

1 stop27h 00m

Denpasar Bali Ngurah Rai

Sun 18/1

21:40-16:35

2 stops26h 55m

$1,391

LondonKuala Lumpur

STN - KUL

STNKUL

London Stansted

Tue 4/11

14:05-14:45

1 stop16h 40m

Kuala Lumpur Intl

Tue 25/11

10:15-18:00

1 stop15h 45m

$1,413

LondonDenpasar

LTN - DPS

LTNDPS

London Luton

Tue 16/9

07:40-09:50

2 stops43h 10m

Denpasar Bali Ngurah Rai

Sat 11/10

19:40-23:30

2 stops34h 50m

$1,425

LondonPhuket City

LTN - HKT

LTNHKT

London Luton

Tue 12/8

14:35-07:55

2 stops35h 20m

Phuket City

Tue 19/8

08:45-22:10

2 stops19h 25m

$1,515

LondonPhuket City

LCY - HKT

LCYHKT

London City

Tue 25/11

19:10-11:25

1 stop33h 15m

Phuket City

Tue 2/12

21:50-12:50

2 stops46h 00m

$1,589

Flights are sorted by cheapest return flights first.

Deals found on 8/7

Showing 1-10 of 35 results
1
2
3
4

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, February is the cheapest month in which you can book a flight from London to Southeast Asia (average of $489). Flying from London to Southeast Asia in December is currently the most expensive (average of $911). 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 10 July 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 10 July 2025.

The most flights from LON to zzYJX are scheduled on a Monday (7 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (7 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 10 July 2025.
See what other customers who have flown with Emirates, KLM, andSWISS 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.

Crew

8.3

Boarding

8.1

Entertainment

8.2

Comfort

8.0

Overall

8.1

Food

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,June 2025

KTM - DXB

Lost 7 pieces of luggage and fly Dubai doesn’t seem to care.

Crew

8.3

Boarding

8.1

Entertainment

8.2

Comfort

8.0

Overall

8.1

Food

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,June 2025

KTM - DXB

Lost 7 pieces of luggage and fly Dubai doesn’t seem to care.

Crew

8.3

Boarding

8.1

Entertainment

8.2

Comfort

8.0

Overall

8.1

Food

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,June 2025

KTM - DXB

Lost 7 pieces of luggage and fly Dubai doesn’t seem to care.

Crew

8.3

Boarding

8.1

Entertainment

8.2

Comfort

8.0

Overall

8.1

Food

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,June 2025

KTM - DXB

Lost 7 pieces of luggage and fly Dubai doesn’t seem to care.

Crew

8.3

Boarding

8.1

Entertainment

8.2

Comfort

8.0

Overall

8.1

Food

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,June 2025

KTM - DXB

Lost 7 pieces of luggage and fly Dubai doesn’t seem to care.

Crew

8.3

Boarding

8.1

Entertainment

8.2

Comfort

8.0

Overall

8.1

Food

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,June 2025

KTM - DXB

Lost 7 pieces of luggage and fly Dubai doesn’t seem to care.

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 SWISS ($837), Emirates ($912), and KLM ($1,209).

  • What are the most popular routes 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: Thai Airways (71%), EVA Air (70%), Air Canada (67%).

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

    On average you can expect to pay $2,068 for a flight from London to Southeast Asia. The cheapest flight overall is $1,110 while the most popular route, (London City - Denpasar Bali Ngurah Rai) is currently priced at $934.

  • 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, February is the cheapest month in which you can book a flight from London to Southeast Asia (average of $489). Flying from London to Southeast Asia in December is currently the most expensive (average of $911). 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.

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 10 July 2025.
AirlineCheapestAverageFlexibilityOn-time
Etihad AirwaysCheapest$1,170Average$1,343FlexibilityNo cancel feeOn-time75%
Search Etihad Airways flights
Thai AirwaysCheapest$1,182Average$1,227FlexibilityNo 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.

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.