$123 Find Cheap Flights from Portland to Ontario - Compare and Save

In the last 5 days, the lowest price for a flight from Portland to Ontario was $123 for a one-way ticket and $302 for a round-trip.

A passport is not required to fly from Portland to Ontario.

When flying out of Portland you will be using Portland. You will be landing at Ontario, also known as Ontario.

We unfortunately don’t have that data for this specific route.

oneworld is the only airline alliance operating flights between Portland and Ontario.

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Portland to Ontario.

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Portland is likely to change within 7 days, so travelers know whether to wait or book now.

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ontario with an airline and back to Portland with another airline. Booking your flights between Portland and ONT can sometimes prove cheaper using this method.

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ontario from Portland up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.