Cheap flights from Ontario to London from $249

Travelers frequently search for route combinations, such as Ontario and Guadalajara, Dallas, Seattle, Las Vegas, San Francisco, Mexico City, Houston, Denver, Honolulu, Sacramento, Chicago, Portland, Washington, D.C., New York, Toronto, Orlando, Veracruz, Cancún, Atlanta, Manila.

Travelers frequently search for route combinations, such as London and New York, Dallas, Los Angeles, Miami, San Francisco, Atlanta, Orlando, Minneapolis, Phoenix, Washington, D.C., Las Vegas, Charlotte, San Diego, Boston, Chicago, Seattle, Detroit, Salt Lake City, Denver, Portland.

The main airport in Ontario is Ontario International. It is also served by Tijuana International, San Diego International, Ontario International, John Wayne, Palm Springs International, Hollywood Burbank, Santa Barbara Municipal, Imperial County, Hawthorne Municipal, Long Beach.

The main airport in London is Gatwick. It is also served by Birmingham, Bristol, East Midlands, Southampton, Cardiff, Bournemouth, Exeter, Norwich, Humberside.

Currently, you can fly between Ontario and London with Frontier Airlines, JetBlue Airways, Ryanair, KLM Royal Dutch Airlines, Air France.

If you don’t have specific dates for your trip between Ontario and London, you can enter a date range into the departure and return fields. Most carriers on the Kiwi.com website allow you to search and book up to six months from the day of your search. Order the search results by the best, cheapest, or fastest route, or find the cheapest outbound and return combination in the pricing table.

Traveling between Ontario and London, you can choose between direct (nonstop) flights or flights with one or more stops. You can select the number of stops on your journey, including an overnight stopover, and the duration of the stopover. What’s more, you can also select where you want to have your stopover. Want to say "Hi" to a friend in another city en route to your destination? Or fancy a quick round of shopping? Go Multi-City or Nomad and add places to your search that you wish to visit.

There are a number of airports in and around Ontario. The main one is Ontario International and other nearby airports include Tijuana International, San Diego International, Ontario International, John Wayne, Palm Springs International, Hollywood Burbank, Santa Barbara Municipal, Imperial County, Hawthorne Municipal, Long Beach

There are a number of airports in and around London. The main one is Gatwick and other nearby airports include Birmingham, Bristol, East Midlands, Southampton, Cardiff, Bournemouth, Exeter, Norwich, Humberside.