$142 Find Cheap Flights from Portland to Ontario

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 10/29. 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

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

Wed, Oct 29 - Thu, Oct 30
Multiple Airlines Logo
11:21 am - 12:11 amPWM-YYZ
12h 50m2 stops
Multiple Airlines Logo
7:35 am - 5:00 pmYYZ-PWM
9h 25m1 stop
$326Multiple Airlines
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Wed, Oct 29 - Tue, Nov 4
Multiple Airlines Logo
11:21 am - 12:11 amPWM-YYZ
12h 50m2 stops
Multiple Airlines Logo
7:35 am - 5:49 pmYYZ-PWM
10h 14m1 stop
$336Multiple Airlines
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Thu, Nov 6 - Mon, Nov 10
Delta Logo
2:38 pm - 11:00 pmPWM-YYZ
8h 22m1 stop
Delta Logo
6:00 am - 11:54 pmYYZ-PWM
17h 54m1 stop
$448Delta
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Tue, Dec 9 - Fri, Dec 12
Delta Logo
6:00 am - 1:47 pmPWM-YUL
7h 47m1 stop
Delta Logo
2:37 pm - 11:21 pmYUL-PWM
8h 44m1 stop
$451Delta
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Sat, Jan 10 - Sun, Jan 11
American Airlines Logo
5:30 am - 4:30 pmPWM-YYZ
11h 00m1 stop
American Airlines Logo
10:59 am - 11:40 pmYYZ-PWM
12h 41m1 stop
$466American Airlines
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Sat, Jan 10 - Sun, Jan 11
American Airlines Logo
5:30 am - 7:00 pmPWM-YYZ
13h 30m2 stops
American Airlines Logo
5:15 pm - 12:06 pmYYZ-PWM
18h 51m1 stop
$476American Airlines
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Sat, Dec 13 - Tue, Dec 16
United Airlines Logo
9:45 am - 7:32 amPWM-YUL
21h 47m2 stops
United Airlines Logo
8:20 am - 10:00 pmYUL-PWM
13h 40m2 stops
$601United Airlines
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Tue, Dec 9 - Fri, Dec 12
United Airlines Logo
9:45 am - 7:32 amPWM-YUL
21h 47m2 stops
United Airlines Logo
8:00 pm - 2:22 pmYUL-PWM
18h 22m2 stops
$636United Airlines
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Sun, Nov 30 - Sun, Dec 7
Air Canada Logo
10:45 am - 7:14 pmPWM-YUL
8h 29m2 stops
Air Canada Logo
3:30 pm - 11:09 pmYUL-PWM
7h 39m2 stops
$706Air Canada
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Sun, Nov 30 - Sun, Dec 7
Air Canada Logo
6:00 am - 1:28 pmPWM-YUL
7h 28m1 stop
Air Canada Logo
3:30 pm - 11:09 pmYUL-PWM
7h 39m2 stops
$721Air Canada
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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.

What is the cheapest month to fly from Portland to Ontario?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Portland to Ontario, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Portland to Ontario is March, when tickets cost $360 (return) on average. On the other hand, the most expensive months are October and June, when the average cost of round-trip tickets is $708 and $665 respectively.

What’s the cheapest day of the week to fly from Portland to Ontario?

The average price of all round-trip flights from Portland to Ontario clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to Ontario on a Wednesday, as we generally find the cheapest rates on that day for this route. On the other hand, Thursday is the most expensive day to fly from Portland to Ontario. For your return ticket, we recommend flying on a Saturday and avoiding Sundays for the best deals.

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Good to know

Low seasonAugust
Cheapest flight$142
Best time to beat the crowds but there is an average 8% increase in price.
Most popular time to fly with an average 22% increase in price.
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.

  • What is the cheapest time of day to fly to Ontario?

    The cheapest time of day to fly to Ontario is generally in the evening, when round-trip flights cost $457 on average. Morning departures are around 9% more expensive than evening flights, on average. The most expensive time of day to fly to Ontario is generally in the morning, which is peak travel time and where the average cost of a ticket is $500.

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.
7.2
American AirlinesOverall score based on 11043 reviews
7.2Comfort
6.4Food
7.5Boarding
8.0Crew
6.9Entertainment
Airline reviews

A couple ladies from the crew were so rude and nasty. Thought they were mad at having to be there especially if you asked a question. This will make me think twice next time if I book a flight with you.

6.0 GoodJean, Oct 2025TUS - DFW
Read more American Airlines reviews

A couple ladies from the crew were so rude and nasty. Thought they were mad at having to be there especially if you asked a question. This will make me think twice next time if I book a flight with you.

Delays to take off and to leave the plane after landing added a lot of time to this flight.

Poor seat in rear of aircraft Food at Admiral’s Club Terminal D at DFW inedible

Always seated jammed in rear of aircraft Admirals Club food at DFW terminal D was absolute worst food experience and I pay $600/year to eat this dried out junk

Flight was delayed because of a bird strike. They had another plane available within 45 minutes.

Mostly good. Flight was crowded but Airline personnel were very friendly & accommodating. It would be good to have savory snacks rather than just sweet Biscoff cookies.

It was a typical flight. We had a delay which seems to be the normality now. And we had no in flight service due to conditions.

Flight attendants on this flight were very attentive and friendly

After we landed we sat on the tarmac for 1.5 hours waiting to get to our gate. Ridiculous.

Food should be better quality. Video screens have poor resolution and the library of movies is poor. The other airlines are much better.

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

Information on your arrival and departure airports

Portland (PWM)

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