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Cheap flights from London, ON to Southeast Asia from C$ 677

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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — BKK
25 Mar — 1 Apr1
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 23 February 2026.

Thu 10/95:40 a.m.
YXU
-
MNL
2 stops25h 20m
United Airlines
Mon 14/98:40 a.m.
MNL
-
YXU
2 stops42h 15m
United Airlines
Deal found 19/2C$ 1,124
Sun 19/45:40 p.m.
YXU
-
SIN
2 stops49h 05m
United Airlines
Thu 23/48:35 p.m.
SIN
-
YXU
2 stops32h 28m
United Airlines
Deal found 19/2C$ 1,220
Thu 9/48:10 p.m.
YXU
-
MNL
3 stops57h 25m
Multiple Airlines
Thu 16/45:45 a.m.
MNL
-
YXU
3 stops36h 50m
Multiple Airlines
Deal found 23/2C$ 1,509
Wed 8/45:40 p.m.
YXU
-
SIN
2 stops47h 35m
Multiple Airlines
Wed 15/410:50 p.m.
SIN
-
YXU
2 stops54h 13m
Multiple Airlines
Deal found 21/2C$ 1,543
Thu 9/48:10 p.m.
YXU
-
BKK
3 stops33h 30m
Multiple Airlines
Thu 16/412:15 p.m.
BKK
-
YXU
3 stops31h 28m
Multiple Airlines
Deal found 23/2C$ 1,585
Fri 24/45:10 a.m.
YXU
-
BKK
2 stops41h 25m
Multiple Airlines
Thu 30/43:45 p.m.
BKK
-
YXU
2 stops36h 48m
Multiple Airlines
Deal found 20/2C$ 1,650
Fri 24/49:25 a.m.
YXU
-
BKK
3 stops37h 10m
United Airlines
Thu 30/43:45 p.m.
BKK
-
YXU
3 stops28h 08m
United Airlines
Deal found 20/2C$ 1,688
Mon 6/48:10 p.m.
YXU
-
MNL
3 stops51h 30m
Multiple Airlines
Mon 13/45:45 a.m.
MNL
-
YXU
3 stops36h 50m
Multiple Airlines
Deal found 20/2C$ 1,695
Fri 24/49:25 a.m.
YXU
-
BKK
2 stops37h 10m
ANA
Thu 30/47:00 a.m.
BKK
-
YXU
3 stops25h 18m
ANA
Deal found 20/2C$ 1,700
Thu 15/105:40 a.m.
YXU
-
BKK
2 stops35h 55m
Air Canada
Mon 19/109:35 p.m.
BKK
-
YXU
2 stops35h 05m
Air Canada
Deal found 19/2C$ 1,732
Wed 25/35:10 a.m.
YXU
-
BKK
2 stops37h 55m
Air Canada
Sun 26/49:30 a.m.
BKK
-
YXU
2 stops42h 33m
Air Canada
Deal found 21/2C$ 2,035
Thu 15/103:30 p.m.
YXU
-
BKK
3 stops31h 05m
United Airlines
Mon 19/103:45 p.m.
BKK
-
YXU
3 stops40h 55m
United Airlines
Deal found 19/2C$ 2,089

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 23 February 2026.

Round-trip from

C$ 1,220

One-way from

C$ 677
United Airlines
  • United Airlines
  • 19/4-23/4
  • 4 total stops
  • 81h 33m total
  • London to Southeast Asia
Search Deals
United Airlines
  • United Airlines
  • 8/4
  • 2 total stops
  • 45h 10m total
  • London to Southeast Asia
Search Deals

Cheapflights Fare Finder

 
Customize 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 629,999 searches. Data last updated 23 February 2026.
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

YXU - SIN

YXUSIN

London

Sun 19/4

5:40 p.m.-6:45 a.m.

2 stops49h 05m

Singapore Changi

Thu 23/4

8:35 p.m.-5:03 p.m.

2 stops32h 28m

C$ 1,220

LondonManila

YXU - MNL

YXUMNL

London

Thu 9/4

8:10 p.m.-5:35 p.m.

3 stops57h 25m

Manila Ninoy Aquino Intl

Thu 16/4

5:45 a.m.-6:35 a.m.

3 stops36h 50m

C$ 1,509

LondonSingapore

YXU - SIN

YXUSIN

London

Wed 8/4

5:40 p.m.-5:15 a.m.

2 stops47h 35m

Singapore Changi

Wed 15/4

10:50 p.m.-5:03 p.m.

2 stops54h 13m

C$ 1,543

LondonBangkok

YXU - BKK

YXUBKK

London

Thu 9/4

8:10 p.m.-4:40 p.m.

3 stops33h 30m

Bangkok Suvarnabhumi

Thu 16/4

12:15 p.m.-8:43 a.m.

3 stops31h 28m

C$ 1,585

LondonBangkok

YXU - BKK

YXUBKK

London

Fri 24/4

9:25 a.m.-9:35 a.m.

3 stops37h 10m

Bangkok Suvarnabhumi

Thu 30/4

3:45 p.m.-8:53 a.m.

3 stops28h 08m

C$ 1,688

LondonManila

YXU - MNL

YXUMNL

London

Mon 6/4

8:10 p.m.-11:40 a.m.

3 stops51h 30m

Manila Ninoy Aquino Intl

Mon 13/4

5:45 a.m.-6:35 a.m.

3 stops36h 50m

C$ 1,695

LondonBangkok

YXU - BKK

YXUBKK

London

Fri 24/4

9:25 a.m.-9:35 a.m.

2 stops37h 10m

Bangkok Suvarnabhumi

Thu 30/4

7:00 a.m.-9:18 p.m.

3 stops25h 18m

C$ 1,700

LondonBangkok

YXU - BKK

YXUBKK

London

Wed 25/3

5:10 a.m.-6:05 a.m.

2 stops37h 55m

Bangkok Suvarnabhumi

Sun 26/4

9:30 a.m.-5:03 p.m.

2 stops42h 33m

C$ 2,035

LondonBangkok

YXU - BKK

YXUBKK

London

Wed 25/3

5:10 a.m.-11:25 a.m.

3 stops43h 15m

Bangkok Suvarnabhumi

Sun 26/4

3:45 p.m.-8:43 a.m.

3 stops27h 58m

C$ 2,307

LondonBangkok

YXU - BKK

YXUBKK

London

Wed 25/3

8:10 p.m.-11:35 p.m.

2 stops40h 25m

Bangkok Suvarnabhumi

Sun 26/4

3:55 p.m.-4:50 p.m.

3 stops35h 55m

C$ 2,920

Flights are sorted by cheapest round-trip flights first.

Deals found on 22/2

Showing 1-10 of 16 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 round-trip 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, Ontario to Southeast Asia?

Currently, August is the cheapest month in which you can book a flight from London, Ontario to Southeast Asia (average of C$ 967). Flying from London, Ontario to Southeast Asia in June is currently the most expensive (average of C$ 1,320). 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.

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 23 February 2026.
Get a feel of what it's like to fly with United Airlines from London to Southeast Asia by reading reviews from past customers. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,342 reviews
Check prices

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
United Airlines
7.4
Good
9,342 reviews
United Airlines
7.4
Good
9,342 reviews
Check prices

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats

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 airport do you fly from for flights from London to Southeast Asia?

    Located just 8.6 km from the city centre, London (YXU) is the airport most travellers will use when flying to Southeast Asia from London.

  • How long is the flight from London, Ontario to Southeast Asia?

    A quick flight from London, Ontario to Southeast Asia can take about 37h 10m. United Airlines provides one of the quickest options available for as low as C$ 1,700. There are 13696 km between London, Ontario and Southeast Asia. This flight may include one or multiple stops.

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

    The most popular route from London, Ontario to Southeast Asia is London - Singapore Changi. You may also consider London - Bangkok Suvarnabhumi or London - Haiphong Catbi.

  • 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 vacation 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, Ontario to Southeast Asia?

    Currently, August is the cheapest month in which you can book a flight from London, Ontario to Southeast Asia (average of C$ 967). Flying from London, Ontario to Southeast Asia in June is currently the most expensive (average of C$ 1,320). 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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See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from London to Southeast Asia

Discover the top airline 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 629,999 searches. Data last updated 23 February 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 1,170AverageC$ 1,663FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers 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?

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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