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Cheap flights from London to Southeast Asia from ₹ 36,525

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 26/3. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BKK
17 Dec — 24 Dec1
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 17 November 2025.

Tue 18/1121:05LHR - IXZ
1 stop30h 35mAir India
Thu 4/1209:40IXZ - LHR
1 stop15h 20mAir India
Deal found 17/11₹ 59,486
Mon 1/1221:10LHR - SIN
1 stop36h 20mShenzhen Airlines
Sat 6/1203:00SIN - LHR
1 stop24h 10mShenzhen Airlines
Deal found 16/11₹ 60,018
Fri 5/1217:50LHR - SIN
1 stop15h 35mLufthansa
Tue 5/523:40SIN - LHR
1 stop16h 00mLufthansa
Deal found 16/11₹ 60,372
Thu 4/1217:30LHR - SIN
1 stop15h 25mLufthansa
Sun 3/523:40SIN - LHR
1 stop16h 00mLufthansa
Deal found 16/11₹ 62,323
Fri 5/1217:50LHR - SIN
1 stop15h 35mMultiple Airlines
Mon 22/1200:05SIN - LHR
1 stop16h 00mMultiple Airlines
Deal found 15/11₹ 63,652
Mon 17/1111:45LHR - SIN
1 stop20h 30mKLM
Mon 8/1201:40SIN - LHR
1 stop20h 10mKLM
Deal found 15/11₹ 63,830
Tue 9/1214:25LHR - SIN
2 stops19h 35mSWISS
Mon 15/1200:05SIN - LHR
1 stop19h 10mSWISS
Deal found 16/11₹ 64,184
Mon 1/1221:05LHR - IXZ
2 stops30h 50mAir India
Wed 10/1210:05IXZ - LHR
1 stop30h 55mAir India
Deal found 15/11₹ 64,362
Fri 5/1209:30LHR - SIN
1 stop19h 00mGulf Air
Wed 6/520:00SIN - LHR
1 stop26h 20mGulf Air
Deal found 16/11₹ 64,628
Tue 9/1207:30LHR - SIN
1 stop27h 10mFinnair
Mon 29/1222:05SIN - LHR
1 stop30h 35mFinnair
Deal found 15/11₹ 64,982
Fri 5/1221:10LHR - SIN
1 stop20h 50mShenzhen Airlines
Tue 16/1203:00SIN - LHR
1 stop24h 10mShenzhen Airlines
Deal found 17/11₹ 65,337
Sat 6/1218:40LHR - SIN
1 stop15h 20mSWISS
Mon 15/1200:05SIN - LHR
1 stop16h 00mSWISS
Deal found 17/11₹ 65,603

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 17 November 2025.

Round-trip from

₹ 55,762

One-way from

₹ 36,525

Popular in

December

Cheapest in

May

Average price

₹ 70,656
Lufthansa
  • Lufthansa
  • 9/1-18/3
  • 2 total stops
  • 35h 30m total
  • London to Southeast Asia
Search Deals
26/3
  • 26/3
  • 1 total stop
  • 21h 05m total
  • London to Southeast Asia
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (₹ 629,352 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (₹ 219,939 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 454,620 searches. Data last updated 17 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

LondonPort Blair

LHR - IXZ

LHRIXZ

London Heathrow

Wed 6/5

22:10-10:55

2 stops56h 15m

Port Blair

Sun 10/5

10:05-19:00

1 stop37h 25m

₹ 63,830

LondonPort Blair

LHR - IXZ

LHRIXZ

London Heathrow

Mon 1/12

21:05-09:25

2 stops30h 50m

Port Blair

Wed 10/12

10:05-11:30

1 stop30h 55m

₹ 64,362

LondonPort Blair

LHR - IXZ

LHRIXZ

London Heathrow

Mon 1/12

21:05-14:25

1 stop35h 50m

Port Blair

Thu 11/12

09:40-19:30

1 stop15h 20m

₹ 67,908

LondonPort Blair

LHR - IXZ

LHRIXZ

London Heathrow

Tue 2/12

21:05-09:10

1 stop30h 35m

Port Blair

Tue 9/12

09:40-19:30

1 stop15h 20m

₹ 67,908

LondonPort Blair

LHR - IXZ

LHRIXZ

London Heathrow

Mon 1/12

21:05-14:25

1 stop35h 50m

Port Blair

Tue 9/12

09:40-19:30

1 stop15h 20m

₹ 67,908

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Tue 10/3

14:25-18:00

2 stops19h 35m

Singapore Changi

Sun 22/3

00:05-08:05

1 stop16h 00m

₹ 68,972

LondonPort Blair

LHR - IXZ

LHRIXZ

London Heathrow

Sun 30/11

21:05-09:10

1 stop30h 35m

Port Blair

Thu 11/12

09:40-19:30

1 stop15h 20m

₹ 69,149

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Sat 7/2

19:20-09:35

1 stop30h 15m

Singapore Changi

Fri 20/2

19:25-06:40

1 stop19h 15m

₹ 74,734

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Wed 3/12

14:25-18:00

2 stops19h 35m

Singapore Changi

Tue 16/12

00:05-13:40

2 stops21h 35m

₹ 75,443

LondonSingapore

LHR - SIN

LHRSIN

London Heathrow

Wed 25/3

10:20-18:40

1 stop24h 20m

Singapore Changi

Wed 8/4

21:35-17:05

1 stop26h 30m

₹ 77,305

Flights are sorted by cheapest return flights first.

Deals found on 17/11

Showing 1-10 of 31 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 ₹ 39,982). Flying from London to Southeast Asia in July is currently the most expensive (average of ₹ 61,170). 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 17 November 2025.

It’s typically best to fly out from London to Southeast Asia at midday. Doing so could potentially save you 26% on the flight price compared to flying in the afternoon, which is usually more expensive.

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 17 November 2025.

The most flights from LON to zzYJX are scheduled on a Sunday (10 on average). You will have fewer flight options on Wednesday, 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 17 November 2025.
Get a feel of what it's like to fly with Air China from London to Southeast Asia by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air China
7.2
Good
124 reviews
Check prices

Crew

7.9

Boarding

7.6

Comfort

7.0

Entertainment

6.4

Food

7.0

Overall

7.2

Reviews

1 / 4
8.0
Excellent

jin oh,Nov 2025

HGH - HKG

Kind attention. Food was ok and the entertainment not remarkable
Air China
7.2
Good
124 reviews
Air China
7.2
Good
124 reviews
Check prices

Crew

7.9

Boarding

7.6

Comfort

7.0

Entertainment

6.4

Food

7.0

Overall

7.2

Reviews

1 / 4
8.0
Excellent

jin oh,Nov 2025

HGH - HKG

Kind attention. Food was ok and the entertainment not remarkable

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?

    Airlines like Finnair, Air India, and Gulf Air fly from London to Southeast Asia in about 19h. The time it takes to get you to your destination can typically vary by up to 37h 15m. The distance between London and Southeast Asia is about 10874 km. Both multi-stop and direct flights can be found to your destination and back.

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

    The top 3 most reliable airlines when flying from London to Southeast Asia are EVA Air (85%), Thai Airways (82%) and Air Canada (78%).

  • 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 ₹ 39,982). Flying from London to Southeast Asia in July is currently the most expensive (average of ₹ 61,170). 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.
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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 454,620 searches. Data last updated 17 November 2025.
AirlineCheapestAverageFlexibilityOn-time
Thai AirwaysCheapest₹ 76,941Average₹ 87,599FlexibilityNo cancel feeOn-time77%
Search Thai Airways flights
EVA AirCheapest₹ 85,746Average₹ 114,873FlexibilityNo cancel feeOn-time74%
Search EVA Air 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?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from London to Southeast Asia. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from London to Southeast Asia?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Southeast Asia from London.

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from London to Southeast Asia, users can toggle the no change fees filter when performing a flight search.

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

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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