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Flights from Ontario to London Starting at AU$ 294

We've found these cheap flights for you. You can book one-way or return flight tickets.

  • One way
  • Return

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Find the best time to fly from Ontario to London

We monitor flight fares to help you find the best deals effortlessly

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.
Airlines Flying from Ontario to London

Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

Frontier Airlines
From AU$ 294
Alaska Airlines
From AU$ 455
Delta Air Lines
From AU$ 462
Jetblue Airways
From AU$ 496
Southwest Airlines
From AU$ 517
United Airlines
From AU$ 549
American Airlines
From AU$ 623
Iberia
From AU$ 650
Virgin Atlantic
From AU$ 668
British Airways
From AU$ 677
ANA airlines

Find more flights and airlines

Alternative Routes from Ontario to London

Searching for potential routes that might be cheaper and faster? Check out these alternative flights from Ontario to London.

  • Cheapest
    Frontier Airlines
    ONT
    07:27
    19h 33m
    1 transfer
    LGW
    11:00
    Ontario International Airport - London Gatwick Airport
    Thu, Apr 4Frontier Airlines
    AU$ 294
  • Frontier Airlines
    ONT
    17:59
    34h 6m
    2 transfer
    LHR
    12:05
    Ontario International Airport - London Heathrow Airport
    Sat, May 4Frontier Airlines
    AU$ 347
  • Delta Air Lines
    ONT
    06:10
    19h 0m
    4 transfer
    LTN
    09:10
    Ontario International Airport - London Luton Airport
    Tue, Apr 23Delta Air Lines
    AU$ 768
  • Delta Air Lines
    ONT
    06:10
    19h 0m
    4 transfer
    LTN
    09:10
    Ontario International Airport - London Luton Airport
    Tue, Apr 23Delta Air Lines
    AU$ 768
    Find More Flights

How do I find the cheapest flights?

  • When are flight from Ontario (ONT) to London (LON) the cheapest?

    Airlines adjust prices for flights from Ontario to London based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.
  • How much are flights from Ontario (ONT) to London (LON) cost?

    According to Trip.com's data, the lowest price is around AU$ 1,391.
  • What is the transportation method from the main airport to downtown in London?

    • The distance from London Gatwick Airport to downtown is about 39km, by taxi about 50 minutes.
    • The distance from London Heathrow Airport to downtown is about 23km, by taxi about 40 minutes.
    • The distance from London Luton Airport to downtown is about 44km, by taxi about 1 hour.
  • What's the most popular airline for direct flights from Ontario (ONT) to London (LON)?

    KLM operates 1 direct flights from Ontario (ONT) to London (LON).
  • How many airports in London (LON)?

Flight Information from Ontario to London

Cheapest direct flight price

AU$ 293

Cheapest return ticket price

AU$ 686

Off-season for travel

September

Peak season for travel

September