Find flights
When to book
FAQs

Cheap flights from London, ON to Southeast Asia from C$ 1,426

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/2. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — BKK
4 Dec — 11 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 4 November 2025.

Thu 13/119:25 a.m.YXU - MNL
2 stops32h 25mUnited Airlines
Mon 17/1111:25 p.m.MNL - YXU
2 stops54h 40mUnited Airlines
Deal found 2/11C$ 1,463
Sat 22/115:15 a.m.YXU - BKK
2 stops61h 15mAir Canada
Wed 26/1111:55 p.m.BKK - YXU
2 stops53h 10mAir Canada
Deal found 3/11C$ 1,576
Sat 22/115:40 p.m.YXU - BKK
3 stops53h 45mUnited Airlines
Wed 26/114:55 p.m.BKK - YXU
3 stops60h 10mUnited Airlines
Deal found 3/11C$ 1,946
Sat 22/119:25 a.m.YXU - BKK
2 stops38h 40mEmirates
Tue 25/111:05 a.m.BKK - YXU
2 stops56h 16mEmirates
Deal found 1/11C$ 4,319

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 4 November 2025.

Round-trip from

C$ 1,426
United Airlines
  • United Airlines
  • 11/2-15/2
  • 4 total stops
  • 81h 51m 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 4 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

YXU - SIN

YXUSIN

London

Wed 11/2

9:25 a.m.-8:15 p.m.

2 stops45h 50m

Singapore Changi

Sun 15/2

10:20 p.m.-9:21 p.m.

2 stops36h 01m

C$ 1,426

LondonManila

YXU - MNL

YXUMNL

London

Thu 13/11

9:25 a.m.-6:50 a.m.

2 stops32h 25m

Manila Ninoy Aquino Intl

Mon 17/11

11:25 p.m.-8:46 a.m.

2 stops46h 21m

C$ 1,463

LondonBangkok

YXU - BKK

YXUBKK

London

Sat 22/11

5:15 a.m.-6:30 a.m.

2 stops61h 15m

Bangkok Suvarnabhumi

Wed 26/11

11:55 p.m.-5:05 p.m.

2 stops53h 10m

C$ 1,576

LondonBangkok

YXU - BKK

YXUBKK

London

Sat 22/11

5:40 p.m.-11:25 a.m.

3 stops53h 45m

Bangkok Suvarnabhumi

Wed 26/11

4:55 p.m.-5:05 p.m.

3 stops60h 10m

C$ 1,946

LondonSingapore

YXU - SIN

YXUSIN

London

Wed 11/2

5:10 a.m.-6:55 a.m.

2 stops36h 45m

Singapore Changi

Sat 14/2

1:10 a.m.-9:21 p.m.

2 stops33h 11m

C$ 3,293

LondonBangkok

YXU - BKK

YXUBKK

London

Sat 22/11

9:25 a.m.-12:05 p.m.

2 stops38h 40m

Bangkok Suvarnabhumi

Tue 25/11

1:05 a.m.-9:21 p.m.

2 stops56h 16m

C$ 4,319

LondonBangkok

YXU - BKK

YXUBKK

London

Sat 13/12

5:40 p.m.-2:50 p.m.

3 stops33h 10m

C$ 1,818

LondonBangkok

YXU - BKK

YXUBKK

London

Sat 13/12

5:10 a.m.-6:30 a.m.

2 stops61h 20m

C$ 1,978

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/11

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, September is the cheapest month in which you can book a flight from London, Ontario to Southeast Asia (average of C$ 1,026). Flying from London, Ontario to Southeast Asia in June is currently the most expensive (average of C$ 1,355). 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.

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 45h 50m. United Airlines provides one of the quickest options available for as low as C$ 1,426. There are 15043 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 - Bangkok Suvarnabhumi. You may also consider London - Manila Ninoy Aquino Intl or London - Singapore Changi.

  • 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, September is the cheapest month in which you can book a flight from London, Ontario to Southeast Asia (average of C$ 1,026). Flying from London, Ontario to Southeast Asia in June is currently the most expensive (average of C$ 1,355). 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.
Pearson Intl to New Delhi flights
Toronto Island to New Delhi flights
Pearson Intl to Haneda flights
Pierre Elliott Trudeau Intl to Suvarnabhumi flights
Pearson Intl to Narita flights
Pearson Intl to Mumbai flights
Pierre Elliott Trudeau Intl to Narita flights
Pearson Intl to Hong Kong flights
Pearson Intl to Suvarnabhumi flights
Pearson Intl to Manila flights
Pearson Intl to Ahmedabad flights
Pierre Elliott Trudeau Intl to Haneda flights
Pearson Intl to Hongqiao Intl flights
Pearson Intl to Incheon Intl flights
Toronto Island to Mumbai flights
Pearson Intl to Ho Chi Minh City flights
Pearson Intl to Amritsar flights
Toronto Island to Narita flights
Pearson Intl to Pu Dong flights
Pearson Intl to Karachi flights
Pierre Elliott Trudeau Intl to Manila flights
Pearson Intl to Hyderabad flights
Toronto Island to Ahmedabad flights
Pearson Intl to Capital flights
Toronto Island to Suvarnabhumi flights
Pierre Elliott Trudeau Intl to Ho Chi Minh City flights
Pearson Intl to Lahore flights
Pearson Intl to Colombo flights
Pearson Intl to Dhaka flights
Pearson Intl to Bangalore flights
Pearson Intl to Taiwan Taoyuan Intl flights
Pearson Intl to Beijing Daxing Intl flights
Pearson Intl to Kuala Lumpur Intl flights
Toronto Island to Hong Kong flights
Toronto Island to Manila flights
Pierre Elliott Trudeau Intl to New Delhi flights
Pierre Elliott Trudeau Intl to Hanoi flights
Pearson Intl to Don Mueang Intl flights
Pierre Elliott Trudeau Intl to Denpasar flights
Pierre Elliott Trudeau Intl to Hongqiao Intl flights
Ottawa to Suvarnabhumi flights
Pearson Intl to Kathmandu flights
Pearson Intl to Guangzhou flights
Ottawa to Narita flights
Pearson Intl to Chennai flights
Toronto Island to Karachi flights
Pearson Intl to Cochin flights
Region of Waterloo Intl to Narita flights
Ottawa to Haneda flights

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 4 November 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 1,434AverageC$ 1,678FlexibilityNo cancel feeOn-time67%
Search Air Canada 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.

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.