$214 Find Cheap Flights from Portland to Ontario - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Portland to Ontario departing on 7/12. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Ontario

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to Ontario, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to Ontario, as well as popular online travel agencies
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Flight Deals

Book Cheap Portland to Ontario Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Portland to Ontario that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Portland to Ontario

Fri, Oct 2 - Wed, Oct 7
American Airlines Logo
10:47 am - 11:00 pm
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12h 13m
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American Airlines Logo
7:29 am - 4:47 pm
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9h 18m
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$453American Airlines
Tue, Jul 21 - Tue, Jul 28
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1:28 pm - 11:13 pm
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9h 45m
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American Airlines Logo
7:25 pm - 12:35 pm
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17h 10m
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$464American Airlines
Tue, Jul 21 - Tue, Jul 28
American Airlines Logo
1:28 pm - 11:13 pm
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9h 45m
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American Airlines Logo
7:25 pm - 12:35 pm
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17h 10m
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$466American Airlines
Sat, Jun 27 - Sat, Jul 4
United Airlines Logo
6:00 am - 1:42 pm
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7h 42m
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United Airlines Logo
2:35 pm - 7:27 pm
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4h 52m
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$487United Airlines
Thu, Jun 25 - Wed, Jul 1
United Airlines Logo
7:16 pm - 11:54 pm
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4h 38m
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United Airlines Logo
7:43 pm - 11:51 pm
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4h 08m
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$488United Airlines
Sat, Jun 27 - Sat, Jul 4
Air Canada Logo
5:00 pm - 11:59 pm
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6h 59m
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Air Canada Logo
8:55 pm - 9:11 am
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12h 16m
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$493Air Canada
Fri, Aug 21 - Mon, Aug 24
United Airlines Logo
7:35 pm - 11:54 pm
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4h 19m
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United Airlines Logo
7:43 pm - 11:59 pm
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4h 16m
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$496United Airlines
Tue, Jul 21 - Tue, Jul 28
Multiple Airlines Logo
8:00 am - 8:05 pm
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36h 05m
2 stops
Multiple Airlines Logo
7:45 am - 10:27 am
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26h 42m
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$514Multiple Airlines
Fri, Jul 3 - Fri, Jul 10
Delta Logo
1:12 pm - 6:46 pm
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5h 34m
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Delta Logo
2:29 pm - 11:30 pm
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9h 01m
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$546Delta
Mon, Nov 23 - Fri, Nov 27
Delta Logo
8:00 am - 4:05 pm
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8h 05m
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Delta Logo
11:15 am - 7:29 pm
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8h 14m
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$586Delta
Booking Insights

KAYAK's insights & trends for Portland to Ontario flights

Get data-powered insights and trends into flights from Portland to Ontario to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Portland to Ontario?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 5 days.

In the past 5 days, the cheapest round-trip tickets from Portland to Ontario were found on American Airlines ($453) and United Airlines ($487).

Good to know

Cheapest flight$214
Flight from Portland to Toronto

FAQs - booking Ontario flights

  • How does KAYAK find such low prices on flights from Portland to 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.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Portland to Ontario?

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

  • What is the Hacker Fare option on flights from Portland to Ontario?

    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 from Portland to Ontario with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Portland to Ontario?

    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 from Portland to Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Portland to Ontario

 
See real verified KAYAK customer reviews for airlines flying from Portland to Ontario. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Portland to Ontario? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.1
American AirlinesOverall score based on 11642 reviews
7.2Comfort
7.9Crew
7.5Boarding
6.4Food
6.9Entertainment
Airline reviews

The seats. The seat in front of me was awful and when the guy sat down, it flew back and hit my head when I was putting my backpack under the seat, It didn't make for a pleasant experience,

6.0 GoodMelissa, Jun 2026
DFW - PHL
Read more American Airlines reviews

The seats. The seat in front of me was awful and when the guy sat down, it flew back and hit my head when I was putting my backpack under the seat, It didn't make for a pleasant experience,

Luggage did not make it onto my plane. Business seats were economy with empty row seat. Just horrible experience. Why would the company allow for transfers that don’t give employees enough time to transfer luggages??

I’ve got 31F seat and window seat . My 2 co passengers was AA crew members and they were very rude attitude and when I was going to use bathroom their gestures was very different and awkward and the guy beside me completely occupied the hand rest and I was really uncomfortable

The gate experience at LAX was abysmal (same for the arrival experience two days prior). Despite the LAX -> SAT schedule of two flights daily, our departure gate was at a smaller hub that we had to be bussed to from Terminal 4. Fortunately, I arrived at LAX extra early and had time to spare, but if I had not known, I might have missed my flight. I looked at the LAX airport map in the AA app and there was no indication of the additional boarding process. Lastly the gate area we were bussed to was crowded with limited food and beverage options. On flight, the fight attendant was hospitable and attentive, the flight was smooth, and AA's free (and working) wifi for AA members were all on the positive side.

It was so much better than expected, Ohare is not such a pleasant experience but American Airlines with the new, clean aeroplane and free Wi-Fi was outstanding and the crew so pleasant and helpful.

The flight attendants were extremely sourly and borderline rude. I did not feel appreciated as an AA customer once.

The flight back to Dallas was delayed, which has happened to me several times with American Airlines. There was no announcement, no update sent out, no compensation offered for the inconvenience.

It wa sort of on time; the cab was left with some trash

Our flight from JFK to Madrid was delayed. We had to go from one side of the Madrid airport (Terminal 4s to the far end of terminal 4 - Gate K98) to our gate in less than 30 minutes. Put passport control and security/baggage check and that’s very hard unless you’re Usain Bolt. I called Iberia Airlines and the telephone customer service told me that I was going to have to pay to re-book. Luckily the help desk in the airport (who was dealing with dozens of people from the same JFK-Madrid flight) did not charge us extra to reschedule to a flight 8 hours later. They also gave us a voucher for breakfast and lunch. Glad the actual person at the airport had some actual sense.

As always, most AA flights that we fly are almost ALWAYS delayed and that too multiple times. Very frustrating

Everything you need to know for your flight from Portland to Ontario

Information on your arrival and departure airports