Cheap flights from Portland, ME to Ontario, CA

Travelers frequently search for route combinations, such as Portland and London, Orlando, New York, Reykjavik, Fort Myers, Boise, Ahmedabad, Cancún, Charleston, Houston, Pittsburgh, Raleigh, Boston, Las Vegas, Denver, Chicago, Miami, Los Angeles, Atlanta, Mexico City.

Travelers frequently search for route combinations, such as Ontario and London, New York, Bangkok, San Francisco, Denver, Sacramento, Taipei, Manila, Toronto, Calgary, Seattle, Las Vegas, San Jose, Orlando, Houston, Macau, Los Angeles, Washington, D.C., Manchester, Detroit.

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, Manchester–Boston Regional, Bangor International, Knox County Regional, Lebanon Municipal, Augusta State, Portsmouth International Airport at Pease, 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, Palm Springs International, Hollywood Burbank, Long Beach, Meadows Field, Santa Barbara Municipal, Imperial County.

Yes, it's possible to combine different modes of transport between Portland and Ontario thanks to our Virtual Interlining technology. Making use of not only flights but also trains and buses between Portland and Ontario can give rise to new adventures. Read more about how Virtual Interlining works on Kiwi.com Stories.

Virtual Interlining provides a revolutionary way of traveling. You can combine different modes of transport like flights, trains, and buses into one itinerary. And this often saves money. Thanks to the world's largest carrier database, the Kiwi.com search function enables anyone to mix and match different modes of transport easily.

Currently, you can fly between Portland and Ontario with United Airlines, Alaska Airlines.

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.