PWM - ONT

$135 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 5/29. 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, 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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Everything you should know

Cheapest round-trip
$319
Delta
Sal 4/7Çar 4/15
PWM - ONT • 1 stop
Cheapest one-way
$135
Typical prices: $155-$560
JetBlue
Cum 5/29
PWM - ONT • 1 stop
Top airlines
Delta
Cheapest • from $319 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
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We hope you love your trip to Ontario!
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Booking Insights
Flight Deals

Cheap Flights from Portland to Ontario (PWM-ONT)

 
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

Sal, Nis 7 - Çar, Nis 15
Delta Logo
5:23 am - 11:47 am
PWM
-
ONT
9h 24m
1 stop
Delta Logo
12:49 pm - 11:23 pm
ONT
-
PWM
7h 34m
1 stop
$319Delta
Sal, Nis 7 - Çar, Nis 15
Delta Logo
4:48 pm - 11:51 pm
PWM
-
ONT
10h 03m
2 stops
Delta Logo
12:49 pm - 11:23 pm
ONT
-
PWM
7h 34m
1 stop
$324Delta
Sal, Nis 7 - Sal, Nis 14
Delta Logo
5:23 am - 11:47 am
PWM
-
ONT
9h 24m
1 stop
Delta Logo
12:49 pm - 11:23 pm
ONT
-
PWM
7h 34m
1 stop
$343Delta
Sal, Nis 7 - Sal, Nis 14
Delta Logo
4:48 pm - 11:51 pm
PWM
-
ONT
10h 03m
2 stops
Delta Logo
12:49 pm - 11:23 pm
ONT
-
PWM
7h 34m
1 stop
$348Delta
Pzt, Nis 6 - Çar, Nis 15
Delta Logo
5:23 am - 11:47 am
PWM
-
ONT
9h 24m
1 stop
Delta Logo
12:49 pm - 11:23 pm
ONT
-
PWM
7h 34m
1 stop
$359Delta
Sal, Nis 7 - Cum, Nis 10
Delta Logo
4:48 pm - 11:51 pm
PWM
-
ONT
10h 03m
2 stops
Delta Logo
12:57 pm - 11:22 pm
ONT
-
PWM
7h 25m
1 stop
$364Delta
Çar, Nis 8 - Sal, Nis 14
Delta Logo
5:23 am - 11:47 am
PWM
-
ONT
9h 24m
1 stop
Delta Logo
12:49 pm - 11:23 pm
ONT
-
PWM
7h 34m
1 stop
$367Delta
Per, May 28 - Sal, Haz 2
JetBlue Logo
2:18 pm - 10:09 pm
PWM
-
ONT
10h 51m
1 stop
JetBlue Logo
11:25 pm - 1:23 pm
ONT
-
PWM
10h 58m
1 stop
$376JetBlue
Pzt, Nis 6 - Sal, Nis 14
Delta Logo
5:23 am - 11:47 am
PWM
-
ONT
9h 24m
1 stop
Delta Logo
12:49 pm - 11:23 pm
ONT
-
PWM
7h 34m
1 stop
$383Delta
Çar, Nis 8 - Cum, Nis 10
Delta Logo
4:48 pm - 11:51 pm
PWM
-
ONT
10h 03m
2 stops
Delta Logo
12:57 pm - 11:22 pm
ONT
-
PWM
7h 25m
1 stop
$388Delta
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 72 hours.

In the past 3 days, the cheapest round-trip tickets from Portland to Ontario were found on Delta ($319) and JetBlue ($376).

Good to know

Cheapest flight$135
Flight from Portland to Ontario

When to book flights from Portland to Ontario

Are your dates flexible? Find out the best times to travel from Portland to Ontario based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Portland to Ontario

  • What is the cheapest flight from Portland to Ontario?

    In the last 3 days, the lowest price for a flight from Portland to Ontario was $135 for a one-way ticket and $319 for a round-trip.

  • Do I need a passport to fly between Portland and Ontario?

    A passport is not required to fly from Portland to Ontario.

  • Which airports will I be using when flying from Portland to Ontario?

    When flying out of Portland you will be using Portland. You will be landing at Ontario, also known as Ontario.

  • Which aircraft models fly most regularly from Portland to Ontario?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Portland to Ontario?

    oneworld, and SkyTeam are the airline alliances operating flights between Portland and Ontario, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from Portland to Ontario, Delta or American Airlines?

    The two airlines most popular with KAYAK users for flights from Portland to Ontario are Delta and American Airlines. With an average price for the route of $363 and an overall rating of 7.9, Delta is the most popular choice. American Airlines is also a great choice for the route, with an average price of $414 and an overall rating of 7.2.

  • 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 to Ontario from Portland 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 to Ontario with an airline and back to Portland with another airline. Booking your flights between Portland and ONT can sometimes prove cheaper using this method.

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

Reviews of the top airlines 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.
7.9
DeltaOverall score based on 8191 reviews
8.5Crew
8.1Boarding
7.2Food
7.9Comfort
7.8Entertainment
Airline reviews

Awesome! On time flight, early arrival, and a complimentary upgrade!

10.0 ExcellentSarah, Feb 2026
SFO - LAX
Read more Delta reviews

Awesome! On time flight, early arrival, and a complimentary upgrade!

Was forced to check in my small carry on, even though I informed the crew it has very fragile items inside

They double booked seats, the gate staff changed my ticket as I was boarding she went over to the computer and changed it without telling me. She messed up an entire three row section for me and others. Other travelers were outraged but the gate staff were so rude, so condescending saying it wasn't their problem to solve. I would rate this a zero if I could. Will not fly Delta again I'll stick with United and American.

I usually get upgraded so my experience is usually amazing. I did not get upgraded this time - which was fine - but the wifi had issues, the monitors were going in & out, & (though not Delta's fault) one of the gentlemen next to me desperately needed a shower.

I really liked the legroom. I am 6’4”.a at For some reason our seats were not together and using the app to fix it didn’t work. Passengers were nice enough to move for us but you should absolutely ensure a parent sits with their child.

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

They changed planes and the new plane couldn’t carry enough fuel to fly across the country so we had to stop in Kansas City to refuel. Flight was delayed .

Flight was too crowded and seats are too small, especially since passengrs are getting larger. Having a middle seat is ALWAYS tough! Woman on my left was large & kept creeping in to my space. Flight personnel were great! Have more savory rather than sweet snacks please.

The crew took good care of us. The flight from ATL to SFO is a longer one, and there were multiple beverage offerings. I like the 757's that Delta uses. Good airplane that is comfortable. I do wish Delta would separate Priority boarding from the better seats. I would gladly take a smaller seat in an open row than be jammed into Comfort just to get priority boarding, just to make sure I don't have to check a bag.

Gate agent rushed to fill hot jetway with crowd so it took over 12 minutes to go from gate to plane. Just like a discount airline Pooly prepared cabin and third time that claim of rough air prevented any cabin service. Friends on a Southwest flight at similar time had service.

The flight was significantly delayed for 6.5 hours because of snow. There was no communication once the plane returned to the gate regarding when the flight would resume. Other flights were departing while our flight was being unloaded for reasons unknown. Our flight also seemed out of the queue regarding further deicing, refueling, and waiting to Taxi to the runway.

They are always late and seats was also not having working charger

did not have enough meal for first class passengers so offer us snack

Amazing I love American. I’ll never fly anyone else if I can help it.

Everything about the flight was lovely. My only suggestion would be to offer a few more options of tv series from Apple TV or HBO.

After the door had been closed, the cockpit makes an announcement that catering is running late and it is not the airline's fault. It is their fault in the sense that we had to sit for 2 hours or more when we could have stayed in the terminal. Poor communications between catering and airline. This caused a young man to lose his temper and he went storming out hitting objects. He had complained to the gate agent that he had already waited at the gate 7 hours and when can the airplane leave? Airilnes do a poor job of explaining delays, maintenance issues, etc. whereas being truthful may gain more sympathy or understanding.

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

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.

Loved the crew . Absolutely no complaints. Except for luggage lost

Wish some foods provided rather than just biscuit/cookie for flight more than 2 hours

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

Information on your arrival and departure airports