$200 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 8/25. 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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Cheap Flights from Portland to Ontario

 
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, Jul 23 - Wed, Jul 30
Delta Logo
6:30 am - 5:33 pmPWM-YYZ
11h 03m1 stop
Delta Logo
6:04 am - 12:57 amYYZ-PWM
18h 53m1 stop
$395Delta
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Thu, Oct 2 - Sun, Oct 5
Delta Logo
6:00 am - 1:39 pmPWM-YYZ
7h 39m1 stop
Delta Logo
6:03 am - 2:00 pmYYZ-PWM
7h 57m1 stop
$398Delta
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Thu, Aug 7 - Tue, Aug 12
American Airlines Logo
6:00 am - 4:35 pmPWM-YYZ
10h 35m1 stop
American Airlines Logo
11:00 am - 11:44 pmYYZ-PWM
12h 44m1 stop
$422American Airlines
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Thu, Aug 7 - Tue, Aug 12
American Airlines Logo
6:00 am - 4:35 pmPWM-YYZ
10h 35m1 stop
American Airlines Logo
11:00 am - 11:44 pmYYZ-PWM
12h 44m1 stop
$474American Airlines
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Wed, Aug 13 - Wed, Aug 20
United Airlines Logo
10:05 am - 7:05 pmPWM-YYZ
9h 00m1 stop
United Airlines Logo
8:10 am - 7:29 pmYYZ-PWM
11h 19m1 stop
$549United Airlines
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Sun, Oct 19 - Wed, Oct 22
United Airlines Logo
5:45 am - 10:04 amPWM-YYZ
4h 19m1 stop
United Airlines Logo
12:05 pm - 7:41 pmYYZ-PWM
7h 36m2 stops
$559United Airlines
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Wed, Jul 23 - Mon, Jul 28
 Logo
12:38 pm - 10:44 pmPWM-YYZ
10h 06m1 stop
 Logo
7:45 am - 5:36 pmYYZ-PWM
9h 51m2 stops
Sun, Oct 19 - Wed, Oct 22
 Logo
6:00 am - 11:44 amPWM-YYZ
5h 44m1 stop
 Logo
8:35 am - 4:55 pmYYZ-PWM
8h 20m1 stop
Wed, Aug 13 - Wed, Aug 20
WestJet Logo
6:00 am - 12:27 amPWM-YUL
18h 27m2 stops
WestJet Logo
12:55 pm - 4:10 pmYUL-PWM
27h 15m1 stop
$840WestJet
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Wed, Aug 13 - Wed, Aug 20
WestJet Logo
6:00 am - 12:27 amPWM-YUL
18h 27m2 stops
WestJet Logo
6:45 am - 11:10 amYUL-PWM
28h 25m2 stops
$1,029WestJet
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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?

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 September, when tickets cost $159 (return) on average. On the other hand, the most expensive months are June and April, when the average cost of round-trip tickets is $665 and $542 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.


Good to know

Low seasonMarch
High seasonNovember
Cheapest flight$200
Best time to beat the crowds with an average 18% drop in price.
Most popular time to fly with an average 17% 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 3 airlines serving 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.
8.0
DeltaOverall score based on 7973 reviews
7.9Comfort
7.9Entertainment
8.2Boarding
8.5Crew
7.3Food
Airline reviews

From Atlanta to Savannah - flight connection was way to short (we weren't even late landing ) and flight was already boarding when we landed - we were told we were the last on board and so we had to gate check our bags. Once we got on the plane, there were at least seven open bag spots so that was unnecessary delay. There should be better communication between the gate agent and the crew.

6.0 GoodBrenda, Jul 2025SAV - ATL
Read more Delta reviews

From Atlanta to Savannah - flight connection was way to short (we weren't even late landing ) and flight was already boarding when we landed - we were told we were the last on board and so we had to gate check our bags. Once we got on the plane, there were at least seven open bag spots so that was unnecessary delay. There should be better communication between the gate agent and the crew.

Crew was excellent. Comfort seats not as nice as other kinds of planes.

Not a "Delta" issue, but a JFK issue: We booked a connecting flight with 3 1/2 hours between to clearn immigration and customs. Our inbound flight (BCN to JFK) was on the taxiway 45 minutes which ate into our layover time. Immigtration was insanely quick with the CBP MPC app; however, clearing TSA (again, after we were ALREADY cleared in Spain on the inbound international flight) took over 95 minutes. This left us with 10 minutes before boarding the connecting flight (JFK to SAN) to walk to the far end of Terminal 4 and try to find food. We didn't find any food that could promise to serve us in under 10 minutes so we boarded the Delta flight after coming off a plance and an 8-hour flight knowing that we wouldn't be served any food on the next 5 1/2 hour flight. I feel like Delta needs to put pressure on the JFK TSA to open more screening stations (by our count, we saw only 5 scanners open and a line of - as we said - over 90 minutes. The insult is that we WERE ALREADY SCREENED through TSA, but as you come off one flight into the USA, you have to go through the whole process again. It seems like if you have a connecting flight, there should be a way to pass through immigration and customs without needing to return through TSA.

It was a great flight and the stewards and stewardess were all kind and accommodating!! The seats were comfortable and entertainment screen excellent!

There are 4 flights in consecutive gates with about the same departure time. Two flights were boarding at the same time. One was delayed or boarding would be happening at the same time. I am not sure what Delta and LAX need to do to have a better layout at the end of Terminal 2

Flight was an hour late, who knows why. It was OK, nothing outstanding.

Only not having an assigned seat was an issue. Rest was great

There was a security issue at the airport and we were unable to land. We circled endlessly and then landed at another airfield for fuel. We then circled the airport again, almost landed but didn’t fully touch down before circling again. I am thankful to the crew for keeping us safe- the issue was the airline and staff at the airport getting us seats on our connecting flights. That part was hours of searching for someone and getting in double my steps.

Boarding was organised and relaxed. Crew were fantastic! Seats were lacking padding causing butt pain and stiffness.

I like for how they process during check in. It was very smoothly.

The flight delay in Dallas created a domino effect that impacted all of the connecting flights. It also increased the number of connections. I missed my flight from Casablanca to Marrakech because of the tight turnaround when landing in Casablanca. . CMN airport was understaffed. Only one person could help while other employees were just watching him. It was an extremely frustrating situation. People were crying and slamming their palms on the counter when speaking to the customer service provider, Allabough (man’s name?). Allabough couldn’t change my flight in the system. simultaneously, I was on the call with America. Airlines customer service rep named Solomon that said he couldn’t change it either. So, I took a ONYA voyages train to from Casablanca to Marrakech to get there on Friday June 26. This was unpredictable trip.

The flight delay in Dallas created a domino effect that impacted all connecting flights, leading to an increase in the number of connections. As a result, I missed my flight from Casablanca to Marrakech due to the tight turnaround when landing in Casablanca. CMN Airport was understaffed; only one employee was available to assist passengers while others just stood by and watched. It was an extremely frustrating situation. Many passengers were crying and banging their hands on the counter while talking to customer service representative Allabough. Unfortunately, Allabough couldn’t change my flight in the system. At the same time, I was on the phone with an American Airlines customer service representative named Solomon, who said he couldn’t make the change either. So, I decided to take an ONYA Voyages train from Casablanca to Marrakech to reach my destination on Friday, June 26. It turned out to be an unpredictable trip.

The flight was fine and the crew awesome. The problem is ORD and AA. Computers went down, ORD fell apart and a 40 min flight turned into a 3 hour trip. Guess the answer is to not try and fly to ORD after noon. But, as I said, crew was awesome and did everything they could to lesson the flight time.

Almost a 6 hour flight and the only food option is a cheese plate… and chips. Also how is it there are no options for texting on American. I’ll be going back to delta and united.

This flight never occurred because AA couldn’t get their act together.

Terrible. Cancelled my original flight. It made getting a boarding pass difficult. The AA employee (in a loud voice, so everyone around could hear) griped at me for not getting a boarding pass 24 hours before. I asked how I was supposed to do that when I had no idea what flight I was going to be on. She said (loudly), “Talk to AA customer service, not me!” I could certainly tell serving customers was not important to her. Our new flight was set to a completely different city. We had to change our rental car, and the price went way up. It took 2-1/2 hours to get checked in. By then our new flight had left. We ended up on stand by and had to split up the family to get to our destination. It cost us the whole first day of the trip. AA needs to employ people who actually care about doing a good job. I suppose those people are getting harder to find, but atleast try.

Am still mad at American airlines. You should know it's us travel nurses who are your customers and you treat us like nonsense it's not ok. American airlines took my money, no refund for whatsoever. A trip that was of 466 and I paid 466 and 833 then they chose for me where to sit and refund my seat choices and gave me expensive seats for 79 USD. Kayak doesn't help at all after booking you are on your own. Skyscanner is better

Bad food, small seats that didn’t recline. I thought I was buying a quantas ticket so I feel like I got scammed

This was a horrible experience. For a first class experience, my chair was held together by 3M tape - and I have a photo. The crew weren’t very attentive, somewhat dismissive and forgot my drink and snack, the chair reclined about 3 inches on a 6-hour cross country flight. I was also not informed that there was no lounge available in Newark airport because of renovations, so all around this was one of the worst experiences and I would actively avoid both American and Alaska Air going forward.

The flight was fine but the 8 hour delay in Chicago was awful - 5 gate changes and repeated delays without an explanation. No vouchers. Nothing.

The flight attendants were super! They created a cosy and warm flight atmosphere!

Not only was the flight delayed more than 3 hours but also there was no internet or movies on the flight. It was Flair/Spirit quality of experience at Westjet prices

West Jet flight was cancelled and I was not notified. I found out when I tried to check in on-line. Spent 4 hours on the phone with West Jet and Just Fly trying to figure what happened.

Only issue was checking in took over an hour and was very stressful. It all worked out, but we weren't sure for a while.

We didn’t make the flight due to Delta’s check in line moving too slow.

It was good, flight was on time, boarding was smooth and done in zones, food was good too but there was no form of entertainment. Luggage’s were intact. So an overall good flight

Flight was delayed 3 times. Then cancelled due to pilot being timed out. They refused hotel vouchers. Gate attendants were very rude and could not help you at all.

No access to any entertainment No food other than a cookie or pretzels even tho flight was over the supper hour Seats very close together and very little leg room Staff was very good

The cancelation of my flight from Toronto to Edmonton without any solution given to me for my next flight. Very poor connection from Toronto to Edmonton

Too squished in seats. I'm 110 lbs and 5'6....can't imagine being any bigger and flying

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