$129 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 1/12. 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

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
$409American Airlines
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Sat, Jan 10 - Sun, Jan 11
American Airlines Logo
5:30 am - 4:35 pmPWM-YYZ
11h 05m1 stop
American Airlines Logo
5:15 pm - 12:06 pmYYZ-PWM
18h 51m1 stop
$410American Airlines
Find Deal
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
$423American Airlines
Find Deal
Sat, Jan 10 - Sun, Jan 11
American Airlines Logo
5:30 am - 7:00 pmPWM-YYZ
13h 30m2 stops
American Airlines Logo
12:39 pm - 11:43 pmYYZ-PWM
11h 04m2 stops
$425American Airlines
Find Deal
Sat, Jan 10 - Sun, Jan 11
American Airlines Logo
5:30 am - 7:00 pmPWM-YYZ
13h 30m2 stops
American Airlines Logo
12:39 pm - 11:43 pmYYZ-PWM
11h 04m2 stops
$428American Airlines
Find Deal
Tue, Jan 13 - Tue, Jan 20
American Airlines Logo
5:20 am - 4:35 pmPWM-YYZ
11h 15m1 stop
American Airlines Logo
12:39 pm - 11:43 pmYYZ-PWM
11h 04m2 stops
$431American Airlines
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Fri, Feb 27 - Sun, Mar 1
Multiple Airlines Logo
11:29 am - 11:20 pmPWM-YYZ
11h 51m2 stops
Multiple Airlines Logo
8:00 pm - 9:07 amYYZ-PWM
13h 07m1 stop
$444Multiple Airlines
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Sat, Jan 10 - Mon, Jan 12
Delta Logo
2:35 pm - 10:56 pmPWM-YYZ
8h 21m1 stop
Delta Logo
6:45 pm - 11:20 amYYZ-PWM
16h 35m1 stop
$446Delta
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Sat, Jan 31 - Wed, Feb 4
Delta Logo
6:00 am - 1:31 pmPWM-YUL
7h 31m1 stop
Delta Logo
9:34 am - 11:22 pmYUL-PWM
13h 48m1 stop
$460Delta
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Sat, Jan 31 - Wed, Feb 4
Delta Logo
6:00 am - 1:31 pmPWM-YUL
7h 31m1 stop
Delta Logo
1:02 pm - 12:20 amYUL-PWM
11h 18m2 stops
$470Delta
Find Deal
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.

How much is a round-trip flight from Portland, Maine to Region of Ontario?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Portland, Maine to Region of Ontario departing in January.

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 November, when the average cost of round-trip tickets is $783 and $727 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$129
Most popular time to fly with an average 33% 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 11039 reviews
6.9Entertainment
8.0Crew
7.2Comfort
6.5Food
7.5Boarding
Airline reviews

My flight was delayed about three hours. I got home at 3:30 in the morning very bad experience.

8.0 ExcellentAnonymous, Nov 2025BNA - CLT
Read more American Airlines reviews

My flight was delayed about three hours. I got home at 3:30 in the morning very bad experience.

I like that the crew kept us informed but we moved back and forth from gate to gate before the aircraft arrived.

The flight was delayed multiple times, again no fault of American but again the extra cost, for everything makes it feel like a cheap airline! Especially when flights are outrageously expensive already

Horrible. Both legs of my flight were delayed more than 6 hours. No compensation, no screens on the plane, and the plane was not clean.

I had a positive experience on American. I'm blind and traveling with a guide dog and the flight attendants were so kind, friendly, and helpful towards us. They checked in on us during the flight and they made us feel comfortable and welcomed. There was an hour delay before depature, but overall the flight was a smooth ride. I appreciate that there were no issues on this long flight back home.

We were told the flight was delayed 5 times, then it was moved to the next day.

More choices on snacks. Built-in video screen to enjoy entertainment choices.

we landed at cmh ten minutes early but had to sit on tarmac for twenty minutes because a plane was at our gate despite the fact that 3 other gates were open.

The experience with American Airlines was good, although the Philippines Airlines flight was much better (better seats, better food, better entertainment options, overall better). Again, the MIA to LAX flight was fine, but nothing in comparison to the comfort and accommodations of the Philippines Airlines flight from LAX to MNL.

I have a gluten allergy so did have any food

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

Information on your arrival and departure airports

Portland (PWM)