Cheap flights from Ontario to Key West from $142

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, London.

Travelers frequently search for route combinations, such as Key West and Tampa, Orlando, Tallahassee, Pensacola, Fort Lauderdale, Providence, Albany, Milwaukee, Detroit, Fort Myers, Spokane, Raleigh, Owensboro, Portsmouth, Albuquerque, Cleveland, Plattsburgh, West Palm Beach, Atlanta, Flint.

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

The main airport in Key West is Key West International. It is also served by Miami International, Key West International.

Currently, you can fly between Ontario and Key West with Frontier Airlines, BREEZE, Spirit Airlines, Allegiant Air, JetBlue Airways.

If you don’t have specific dates for your trip between Ontario and Key West, 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 Key West, 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 Los Angeles International, Tijuana International, San Diego International, Ontario International, John Wayne, Palm Springs International, Hollywood Burbank, Long Beach, Santa Barbara Municipal, Imperial County

There are a number of airports in and around Key West. The main one is Key West International and other nearby airports include Miami International, Key West International.