Find flights
When to book
Airlines
FAQs

Cheap flights from London to Southeast Asia from $646

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 29/8. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BKK
12 Jul — 19 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 12 June 2026.

Mon 2/1109:50
LCY
-
KUL
1 stop22h 50m
Lufthansa
Mon 9/1123:55
KUL
-
LCY
1 stop17h 20m
Lufthansa
Deal found 8/6$1,222
Wed 4/1109:50
LCY
-
KUL
1 stop22h 50m
Lufthansa
Thu 26/1123:55
KUL
-
LCY
1 stop17h 20m
Lufthansa
Deal found 9/6$1,224
Wed 4/1109:50
LCY
-
KUL
1 stop22h 50m
Lufthansa
Sun 15/1123:55
KUL
-
LCY
1 stop17h 20m
Lufthansa
Deal found 10/6$1,225
Fri 6/1109:50
LCY
-
KUL
1 stop22h 50m
Lufthansa
Sun 15/1123:55
KUL
-
LCY
1 stop17h 20m
Lufthansa
Deal found 12/6$1,227
Wed 7/1013:10
LCY
-
DPS
2 stops28h 00m
SWISS
Mon 19/1013:15
DPS
-
LCY
2 stops26h 25m
SWISS
Deal found 7/6$1,251
Wed 25/1113:30
LCY
-
DPS
2 stops26h 50m
SWISS
Thu 25/220:15
DPS
-
LCY
2 stops20h 25m
SWISS
Deal found 11/6$1,254
Tue 17/1119:05
LCY
-
DPS
2 stops21h 15m
SWISS
Mon 30/1120:15
DPS
-
LCY
2 stops20h 25m
SWISS
Deal found 8/6$1,260
Tue 1/1219:05
LCY
-
DPS
2 stops21h 15m
SWISS
Wed 9/1220:15
DPS
-
LCY
2 stops20h 25m
SWISS
Deal found 10/6$1,262
Sun 1/1119:05
LCY
-
DPS
2 stops21h 15m
SWISS
Wed 11/1120:15
DPS
-
LCY
2 stops20h 25m
SWISS
Deal found 11/6$1,264
Wed 30/906:55
STN
-
KUL
1 stop18h 15m
Turkish Airlines
Sun 11/1009:50
KUL
-
STN
1 stop31h 05m
Turkish Airlines
Deal found 12/6$1,274
Wed 7/1013:10
LCY
-
DPS
2 stops28h 00m
SWISS
Thu 15/1013:15
DPS
-
LCY
2 stops26h 25m
SWISS
Deal found 8/6$1,288
Sun 15/1119:05
LCY
-
DPS
2 stops21h 15m
SWISS
Sun 29/1120:15
DPS
-
LCY
2 stops20h 25m
SWISS
Deal found 11/6$1,292

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 12 June 2026.

Round-trip from

$1,222

One-way from

$646

Popular in

December

Cheapest in

September

Average price

$1,051
Lufthansa
  • Lufthansa
  • 2/11-9/11
  • 2 total stops
  • 40h 10m total
  • London to Southeast Asia
Search Deals
29/8
  • 29/8
  • 1 total stop
  • 25h 30m total
  • London to Southeast Asia
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($112 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($53 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 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 647,157 searches. Data last updated 12 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

LondonKuala Lumpur

STN - KUL

STNKUL

London Stansted

Mon 16/11

14:05-14:45

1 stop16h 40m

Kuala Lumpur Intl

Sat 21/11

01:25-17:55

1 stop24h 30m

$1,421

LondonPhuket City

LCY - HKT

LCYHKT

London City

Wed 28/10

17:05-17:35

2 stops17h 30m

Phuket City

Thu 19/11

18:20-08:50

2 stops21h 30m

$1,435

LondonKuala Lumpur

STN - KUL

STNKUL

London Stansted

Thu 17/9

17:35-08:10

1 stop31h 35m

Kuala Lumpur Intl

Mon 28/9

09:50-22:10

1 stop19h 20m

$1,441

LondonKuala Lumpur

STN - KUL

STNKUL

London Stansted

Wed 1/7

14:55-08:35

1 stop34h 40m

Kuala Lumpur Intl

Tue 21/7

02:15-12:55

1 stop17h 40m

$1,444

LondonKuala Lumpur

STN - KUL

STNKUL

London Stansted

Mon 6/7

14:55-08:35

1 stop34h 40m

Kuala Lumpur Intl

Thu 16/7

10:20-18:45

1 stop15h 25m

$1,448

LondonKuala Lumpur

STN - KUL

STNKUL

London Stansted

Tue 30/6

14:55-08:35

1 stop34h 40m

Kuala Lumpur Intl

Mon 13/7

10:20-19:00

1 stop15h 40m

$1,448

LondonKuala Lumpur

LTN - KUL

LTNKUL

London Luton

Mon 6/7

05:40-19:45

3 stops31h 05m

Kuala Lumpur Intl

Thu 16/7

09:50-22:35

2 stops19h 45m

$1,456

LondonPhuket City

LCY - HKT

LCYHKT

London City

Tue 24/11

17:05-17:35

2 stops17h 30m

Phuket City

Thu 10/12

16:55-07:15

2 stops21h 20m

$1,489

LondonKuala Lumpur

STN - KUL

STNKUL

London Stansted

Thu 9/7

14:55-08:35

1 stop34h 40m

Kuala Lumpur Intl

Wed 29/7

10:20-18:45

1 stop15h 25m

$1,512

LondonKuala Lumpur

STN - KUL

STNKUL

London Stansted

Wed 1/7

21:05-08:35

1 stop28h 30m

Kuala Lumpur Intl

Wed 8/7

19:10-12:55

1 stop24h 45m

$1,516

Flights are sorted by cheapest return flights first.

Deals found on 11/6

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

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 $1,172). Flying from London to Southeast Asia in December is currently the most expensive (average of $1,940). 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 12 June 2026.

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 at midday, which can drop the price by up to 40% versus a flight in the afternoon.

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 12 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?

The price you pay for your flight from London to Southeast Asia may vary depending on when you book. For the best chance of a lower fare, look to book 82 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 12 June 2026.
See what other customers who have flown with Etihad Airways 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.
Etihad Airways
7.3
Good
1,452 reviews
Check prices

Entertainment

7.2

Boarding

7.6

Comfort

7.3

Crew

7.8

Overall

7.3

Food

7.2

Reviews

1 / 20
8.0
Excellent

Tom,May 2026

JFK - AUH

Everything was good except the lie flat bed. The bed has a gap and is uncomfortable to lie on. The hostesses were great; the food service was reasonable and the connecting flight services and the baggage service were good. Entertainment service was also good.
Etihad Airways
7.3
Good
1,452 reviews
Etihad Airways
7.3
Good
1,452 reviews
Check prices

Entertainment

7.2

Boarding

7.6

Comfort

7.3

Crew

7.8

Overall

7.3

Food

7.2

Reviews

1 / 20
8.0
Excellent

Tom,May 2026

JFK - AUH

Everything was good except the lie flat bed. The bed has a gap and is uncomfortable to lie on. The hostesses were great; the food service was reasonable and the connecting flight services and the baggage service were good. Entertainment service was also good.

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?

    Emirates, KLM, and Turkish Airlines can get you from London to Southeast Asia in just under 16h 30m. Your travel time can differ by up to 15h 05m. Airlines will cover a distance of 10543 km. Both multi-stop and direct flights can be found to your destination and back.

  • 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: Thai Airways (92%), EVA Air (91%), Air Canada (91%).

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

    On average you can expect to pay $1,467 for a flight from London to Southeast Asia. The cheapest flight overall is $1,302 while the most popular route, (London City - Denpasar Bali Ngurah Rai) is currently priced at $870.

  • 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 $1,172). Flying from London to Southeast Asia in December is currently the most expensive (average of $1,940). 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.
Gatwick to Suvarnabhumi flights
Heathrow to Singapore flights
Heathrow to Suvarnabhumi 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.