$224 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 9/11. 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

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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

Sat, Aug 29 - Sat, Sep 5
KLM Logo
6:10 am - 1:41 pm
PWM
-
YYZ
7h 31m
1 stop
KLM Logo
6:25 pm - 2:23 pm
YYZ
-
PWM
19h 58m
1 stop
$474KLM
Fri, Aug 21 - Mon, Aug 24
American Airlines Logo
6:02 am - 4:45 pm
PWM
-
YYZ
10h 43m
1 stop
American Airlines Logo
2:15 pm - 11:47 pm
YYZ
-
PWM
9h 32m
1 stop
$477American Airlines
Fri, Oct 2 - Mon, Oct 5
American Airlines Logo
10:47 am - 11:00 pm
PWM
-
YYZ
12h 13m
1 stop
American Airlines Logo
7:22 am - 4:57 pm
YYZ
-
PWM
9h 35m
1 stop
$488American Airlines
Tue, Nov 3 - Sat, Nov 7
United Airlines Logo
3:10 pm - 9:24 pm
PWM
-
YYZ
6h 14m
1 stop
United Airlines Logo
10:00 am - 2:27 pm
YYZ
-
PWM
4h 27m
1 stop
$491United Airlines
Fri, Aug 28 - Wed, Sep 2
American Airlines Logo
6:02 am - 4:45 pm
PWM
-
YYZ
10h 43m
1 stop
American Airlines Logo
2:15 pm - 11:47 pm
YYZ
-
PWM
9h 32m
1 stop
$493American Airlines
Thu, Aug 27 - Sun, Aug 30
American Airlines Logo
1:30 pm - 9:46 am
PWM
-
YUL
20h 16m
1 stop
American Airlines Logo
10:31 am - 12:40 pm
YUL
-
PWM
26h 09m
1 stop
$493American Airlines
Thu, Sep 10 - Wed, Sep 16
American Airlines Logo
2:03 pm - 11:26 pm
PWM
-
YYZ
9h 23m
1 stop
American Airlines Logo
11:40 am - 11:47 pm
YYZ
-
PWM
12h 07m
1 stop
$494American Airlines
Tue, Sep 22 - Thu, Sep 24
WestJet Logo
5:29 pm - 11:39 pm
PWM
-
YYZ
6h 10m
1 stop
WestJet Logo
6:10 pm - 3:55 pm
YYZ
-
PWM
21h 45m
1 stop
$498WestJet
Thu, Nov 19 - Tue, Nov 24
Multiple Airlines Logo
10:01 am - 2:40 pm
PWM
-
YYZ
28h 39m
1 stop
Multiple Airlines Logo
5:15 pm - 9:08 am
YYZ
-
PWM
15h 53m
1 stop
$509Multiple Airlines
Thu, Aug 6 - Sat, Aug 8
American Airlines Logo
6:02 am - 1:26 pm
PWM
-
YYZ
7h 24m
1 stop
American Airlines Logo
10:56 am - 3:07 pm
YYZ
-
PWM
4h 11m
1 stop
$510American Airlines
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 KLM ($474) and American Airlines ($477).

Find deals

Good to know

Cheapest flight

$224
Flight from Portland to Montreal

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 11837 reviews
7.5Boarding
6.4Food
6.8Entertainment
7.9Crew
7.2Comfort
Airline reviews

My flight was 4 hours delayed on departure at 6a causing me to miss my connection at DCA. I had to scramble to find a seat home on a later flight and instead of an exit seat, I was in row 30 on a flight getting me home 5 hours later than planned. The AA team on the ground did a fine job. AA continues to run the airline like the passengers are cargo.

2.0 MediocreEric, Jul 2026
BGR - DCA
Read more American Airlines reviews

My flight was 4 hours delayed on departure at 6a causing me to miss my connection at DCA. I had to scramble to find a seat home on a later flight and instead of an exit seat, I was in row 30 on a flight getting me home 5 hours later than planned. The AA team on the ground did a fine job. AA continues to run the airline like the passengers are cargo.

Flight was late and boarding was confusing because gate changed and I didn’t get a notification

The plane was probably full boarding was easy. We were able to check our carry-on luggage for free. It was a return flight through Philly to LA. Never saw a stewardess do a demonstration of emergency Procedures. I think my flight was pretty full

Was a normal flight but it was delayed, and there wasn't an explanation.

Boarding was disorganized and delayed because they overbooked and wanted people to give up seats then further delayed due to an issue with the plane. They did not load my bag and it took a day for them to return it. Flight attendant was lovely and the only positive thing about this trip.

a321 business class not up to transcontinental & international flight standards

BA is now my preferred way to travel. On ground staff in Canada, London and Nairobi were patient , polite and helpful with our group. On board staff went that extra mile to make sure we felt important. Best of all, no lost luggage! Highly recommend BA in fact have 2 more long hauls with them this year.

Flight was delayed after boarding and no idea when it would take off. Crew in Portland did arrange for transport to Boston for a different set of flights to my destination.

I rarely vote ‘Excellent’ but this AA flight out of LGA was amazing. On time departure, early arrival, amazing crew, smooth flight, baggage came out quickly. It was the best airport/ flight experience that anyone could ask for/dream of. Highly recommend. I usually fly Delta but American Airlines really stepped up their game.

Seats are so close together. Middle seats should be discounted.

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

Information on your arrival and departure airports

Portland (PWM)