Cheap Flights from Ontario (ONT) to Portland (PDX)

View AU$121 flight on Tue, 4 Nov. 2025Opens in a new window

Popular airlines from Los Angeles - Ontario Intl. Airport (ONT) to Portland International Airport (PDX)

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Cheap Flights from Ontario (ONT) to Portland (PDX)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Wed, 15 Oct. - Wed, 22 Oct.
ONT
Ontario
PDX
Portland
AU$272 Return, just found
AU$272
Return
just found
Select Alaska Airlines flight, departing Wed, 15 Oct. from Ontario to Portland, returning Wed, 22 Oct., priced at AU$272 just found
American Airlines
Wed, 15 Oct. - Wed, 22 Oct.
ONT
Ontario
PDX
Portland
AU$274 Return, just found
AU$274
Return
just found
Select American Airlines flight, departing Wed, 15 Oct. from Ontario to Portland, returning Wed, 22 Oct., priced at AU$274 just found
Alaska Airlines
Wed, 15 Oct. - Wed, 22 Oct.
ONT
Ontario
PDX
Portland
AU$303 Return, just found
AU$303
Return
just found
Select Alaska Airlines flight, departing Wed, 15 Oct. from Ontario to Portland, returning Wed, 22 Oct., priced at AU$303 just found
American Airlines
Wed, 15 Oct. - Wed, 22 Oct.
ONT
Ontario
PDX
Portland
AU$319 Return, just found
AU$319
Return
just found
Select American Airlines flight, departing Wed, 15 Oct. from Ontario to Portland, returning Wed, 22 Oct., priced at AU$319 just found
United
Wed, 15 Oct. - Wed, 22 Oct.
ONT
Ontario
PDX
Portland
AU$342 Return, just found
AU$342
Return
just found
Select United flight, departing Wed, 15 Oct. from Ontario to Portland, returning Wed, 22 Oct., priced at AU$342 just found
Alaska Airlines
Wed, 15 Oct. - Wed, 22 Oct.
ONT
Ontario
PDX
Portland
AU$348 Return, just found
AU$348
Return
just found
Select Alaska Airlines flight, departing Wed, 15 Oct. from Ontario to Portland, returning Wed, 22 Oct., priced at AU$348 just found
Alaska Airlines
Wed, 15 Oct. - Wed, 22 Oct.
ONT
Ontario
PDX
Portland
AU$356 Return, just found
AU$356
Return
just found
Select Alaska Airlines flight, departing Wed, 15 Oct. from Ontario to Portland, returning Wed, 22 Oct., priced at AU$356 just found
Delta
Wed, 15 Oct. - Wed, 22 Oct.
ONT
Ontario
PDX
Portland
AU$357 Return, just found
AU$357
Return
just found
Select Delta flight, departing Wed, 15 Oct. from Ontario to Portland, returning Wed, 22 Oct., priced at AU$357 just found
Alaska Airlines
Wed, 15 Oct. - Wed, 22 Oct.
ONT
Ontario
PDX
Portland
AU$357 Return, just found
AU$357
Return
just found
Select Alaska Airlines flight, departing Wed, 15 Oct. from Ontario to Portland, returning Wed, 22 Oct., priced at AU$357 just found
United
Wed, 15 Oct. - Wed, 22 Oct.
ONT
Ontario
PDX
Portland
AU$372 Return, just found
AU$372
Return
just found
Select United flight, departing Wed, 15 Oct. from Ontario to Portland, returning Wed, 22 Oct., priced at AU$372 just found

Find the cheapest month to fly from Ontario (ONT) to Portland (PDX)

December is typically the cheapest month to fly

From AU$105 - AU$423 per traveller.

Graph displaying average flight prices per month

Flight from Ontario to Portland route information
Origin airport
Los Angeles - Ontario Intl.
Destination airport
Portland Intl.
Return price
AU$272
Distance
1342 km
Average flight time
2 hours 21 mins

Your quick guide to flights from Ontario to Portland

Pick up great flights from Ontario to Portland

With Expedia, you have your pick of flights a day with 20 airlines covering flights from Ontario to Portland. Whether you’re on a business trip, a family holiday or a luxury break, just enter your travel dates, hit search then check out your choice of flights. Select from return, one way or multi-city flights, and use the advance search tool if you want a direct or refundable flight. You can narrow your search to show you just your preferred cabin class and airline, too. It’s all easy. You can book direct flights from Ontario to Portland that take around hours.

Find cheap flights from Ontario to Portland

From the great flight deals with prices currently ranging from AU$272 to AU$372, you can choose to see the cheapest flights first. Generally, you can book the cheapest flights from Ontario to Portland around 4 to 6 weeks in advance. If your travel dates are flexible, try to avoid weekends and peak seasons – when you are more likely to grab the lowest prices. Even last minute, there are some impressive deals. The cheapest time to fly to Portland is normally in October.

Reasons to book your flight from Ontario to Portland with Expedia

Expedia makes it easy to find, book, and travel, with everything you need all in one place. When you enter your travel details, find fantastic deals just for you on flight tickets from Ontario to Portland across all the main airline carriers, so you can save time, dollars, and hassle finding the perfect flight. If you think your plans could change, choose refundable flights so any changes won’t cost you more. Book your flight to Portland right now and, if you join Expedia Rewards, you earn points this time and every time you travel with Expedia.

Frequently asked questions

How much is a flight from Los Angeles - Ontario Intl. Airport (ONT) to PDX?
Within the past 7 days on Expedia, for flights departing within the next year, the lowest price available for a round-trip journey from ONT to PDX was AU$272. Cheap tickets don't hang around forever, so make sure you book yours ASAP. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from ONT to Portland Airport?
This varies between air carriers, as each one has its own set of terms and conditions. Visit the Customer Service Portal, where you'll find instructions on how to cancel online.
How do I find cheap flights from ONT to PDX that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Los Angeles - Ontario Intl. Airport (ONT) to PDX Airport flights, you'll see a "no change fees" filter for you to select.
How far is the flight from ONT to Portland Intl. Airport (PDX)?
That new movie you've been eager to see will have to wait — the flight distance between Los Angeles - Ontario Intl. Airport (ONT) (ONT) and Portland Airport (PDX) is only 1 350 kilometres. The captain will be instructing you to buckle up for landing before you know it.
Which airlines fly direct from ONT to PDX Airport?
Check out the deals on offer with Alaska Airlines (AS) if you want to fly straight from Los Angeles - Ontario Intl. Airport (ONT) to Portland Airport. This popular carrier offers 26 flights monthly, so you're sure to find one that fits your travel schedule.
Are Ontario Airport to PDX flight tickets cheaper when they're purchased at the last minute?
Booking your trip from ONT to Portland Intl. Airport (PDX) at the last minute could be your ticket to a cheap deal. However, it could end up costing you a whole lot more! If you'd rather play it safe, book well ahead of your departure date. In fact, Expedia has some of the biggest bargains up to 12 months in advance. If your preferred carrier hasn't released tickets yet, check back regularly as deals are updated all the time on Expedia.

Explore a world of travel with Expedia

Ontario Airports

Los Angeles

Los Angeles Intl. to Portland
AU$243.80

Orange County

John Wayne to Portland
AU$273.40

Burbank

*Available to Expedia members.