Cheap flights from Portland to Ontario from $283

Travelers frequently search for route combinations, such as Portland and Orlando, Tampa, Raleigh, Charleston, Norfolk, Indianapolis, Minneapolis, Mexico City, Montreal, Long Beach, Bujumbura, Malta, Lisbon, Bariloche, Khartoum, Auckland, Puerto Vallarta, Anchorage, Nadi, Tortola.

Travelers frequently search for route combinations, such as Ontario and San Francisco, Las Vegas, Dallas, Guadalajara, Seattle, Sacramento, Houston, Portland, Denver, Atlanta, Chicago, New York, Los Angeles, Mexico City, Washington, D.C., Rome, Orlando, St. Louis, Columbus, Fargo.

The main airport in Portland is Portland International Jetport. It is also served by Logan International, Rhode Island T. F. Green Int'l Airport, Portland International Jetport, Bangor International, Manchester–Boston Regional, Portsmouth International Airport at Pease, Barnstable Municipal, Augusta State, Lebanon Municipal, Hancock County-Bar Harbor.

The main airport in Ontario is Ontario International. It is also served by Tijuana International, San Diego International, Ontario International, John Wayne, Hollywood Burbank, Palm Springs International, Santa Barbara Municipal, Long Beach, Meadows Field, McClellan–Palomar.

Currently, you can fly between Portland and Ontario with Frontier Airlines, JetBlue Airways, United Airlines, BREEZE.

If you don’t have specific dates for your trip between Portland and Ontario, 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 Portland and Ontario, 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 Portland. The main one is Portland International Jetport and other nearby airports include Logan International, Rhode Island T. F. Green Int'l Airport, Portland International Jetport, Bangor International, Manchester–Boston Regional, Portsmouth International Airport at Pease, Barnstable Municipal, Augusta State, Lebanon Municipal, Hancock County-Bar Harbor

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, Hollywood Burbank, Palm Springs International, Santa Barbara Municipal, Long Beach, Meadows Field, McClellan–Palomar.