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London to Ontario - Flights Starting at US$402

Book one-way or return flights from London to Ontario from as little as US$402. Choose from the popular airlines below and book your flight today!

  • One way
  • Round-trip
      • LGW13:05
        17h 4m
        1 stop
        ONT22:09
        Wed, May 8|London - Ontario|Norse Atlantic Airways
        US$402US$968
        57% OFF
        57% OFF
        US$968US$402
      • LGW13:05
        17h 4m
        1 stop
        ONT22:09
        Mon, May 13|London - Ontario|Norse Atlantic Airways
        US$435US$968
        55% OFF
        55% OFF
        US$968US$435
      • LGW13:05
        17h 4m
        1 stop
        ONT22:09
        Sat, May 25|London - Ontario|Norse Atlantic Airways
        US$444US$968
        54% OFF
        54% OFF
        US$968US$444
      • LGW13:05
        17h 4m
        1 stop
        ONT22:09
        Tue, May 14|London - Ontario|Norse Atlantic Airways
        US$444
        US$444
      • LGW13:05
        17h 4m
        1 stop
        ONT22:09
        Wed, May 15|London - Ontario|Norse Atlantic Airways
        US$456
        US$456
      • LGW13:05
        17h 4m
        1 stop
        ONT22:09
        Mon, May 6|London - Ontario|Norse Atlantic Airways
        US$483
        US$483
      • LGW10:30
        19h 39m
        1 stop
        ONT22:09
        Tue, May 14|London - Ontario|Jetblue Airways
        US$704
        US$704
      • LGW10:30
        19h 39m
        1 stop
        ONT22:09
        Mon, May 6|London - Ontario|Jetblue Airways
        US$712
        US$712
      • LGW10:30
        19h 39m
        1 stop
        ONT22:09
        Tue, May 7|London - Ontario|Jetblue Airways
        US$718
        US$718
      • LGW10:30
        19h 39m
        1 stop
        ONT22:09
        Mon, May 13|London - Ontario|Jetblue Airways
        US$724
        US$724
      • LON13:00
        3h 5m
        Direct
        ONT14:00
        Tue, May 7|London - Ontario|Norse Atlantic Airways
        Find More Flights
        Find More Flights

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

We've found these cheap flights for you. You may book a one-way or round trip as per your needs.

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

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

View airlines operating flights from London to Ontario. Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

Norse Atlantic Airways
From US$242
Vueling Airlines
From US$336
Air Transat
From US$621
TAP Air Portugal
From US$681
Jetblue Airways
From US$704
easyJet
From US$727
Icelandair
From US$1,062
Iberia
From US$1,296
United Airlines
From US$1,322
Lufthansa
From US$1,351
ANA airlines

Find more flights and airlines

Alternative Routes from London to Ontario

Discover different routes, airlines, and transfers and find the best alternative flights for your journey from London to Ontario.

  • Cheapest
    Norse Atlantic Airways
    LGW
    14:00
    40h 27m
    2 transfer
    ONT
    22:27
    London Gatwick Airport - Ontario International Airport
    Fri, May 17Norse Atlantic Airways
    US$242
  • Virgin Atlantic
    LHR
    10:55
    13h 41m
    2 transfer
    ONT
    16:36
    London Heathrow Airport - Ontario International Airport
    Tue, May 14Virgin Atlantic
    US$518
  • easyJet
    LTN
    06:05
    22h 1m
    4 transfer
    ONT
    20:06
    London Luton Airport - Ontario International Airport
    Mon, Jun 3easyJet
    US$637
  • easyJet
    LTN
    06:05
    22h 1m
    4 transfer
    ONT
    20:06
    London Luton Airport - Ontario International Airport
    Mon, Jun 3easyJet
    US$637
    Find More Flights

Frequently Asked Questions

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

    Airlines adjust prices for flights from London to Ontario based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much do flights from London (LON) to Ontario (ONT) cost?

    According to Trip.com's data, the lowest price is around $1,191.

How to find a cheap flight from London to Ontario

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from London to Ontario. Book your flights at the right time and save more.
1
Book Early
Once prices are gone, they're gone. Lock in deals while you can!
2
Compare Flight Prices
Compare prices on travel agency and airline websites.
3
Look Out for Deals
Check airline and travel agency websites for latest flight deals
4
Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
5
Try Different Dates
Flying during the week, early in the morning, or late at night can help save money.
6
Use the Trip.com App
Save up to £10 per person when booking your flights on Trip.com
London to Ontario Flight Information

Cheapest nonstop flight price

$402

Cheapest round-trip ticket price

$524

Off-season for travel

March

Peak season for travel

September

Flight distance

5,726.56km

Popular airline

Delta Air Lines

Read before Taking Flights from London to Ontario

If you’re looking to book cheap flights from London to Ontario, Trip.com has you covered. Many people travel from London to Ontario for the city’s world-famous sights, delicious American cuisine and unrivalled shopping scene. A convenient destination, you can fly from London to Ontario in just over 7 hours 15 mins, making it the perfect place for a short city break, or even a gateway to explore the rest of United States. With prices starting from just £325, there’s never been a better time to book tickets from London to Ontario and experience all that this incredible city has to offer.

How to find a cheap flights from London to Ontario

Finding cheap flights from London to Ontario is easy with our money-saving tips. You can secure the best deals by booking in advance, flying on a weekday rather than a weekend, going incognito when browsing for flights, and choosing to fly with better-priced budget airlines.

Airlines that fly from London to Ontario

A few airlines offer direct flights from London to Ontario, including British Airways, American Airlines

Flight time from London to Ontario

Ontario lies a distance of 3567 miles miles from London, with flights taking around 7 hours 15 mins.

Departure from a London Airport to Ontario

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