ONT - PDX

$75 Find Cheap Flights from Ontario to Portland

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Portland departing on 4/23. 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 Portland

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Portland.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Portland.
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Everything you should know

Cheapest round-trip
$160
Typical prices: $328-$187
Frontier
Mon 4/27Sat 5/2
ONT - PDX • 1 stop
Cheapest non-stop
$197
Typical prices: $333-$197
Alaska Airlines
Tue 4/21Sat 4/25
ONT - PDX • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts and KAYAK users. AI can make mistakes.
ONT's streamlined security ensures quick departures.
Frontier's Economy Bundle includes a carry-on bag.
Expert advice
Expert advice
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Expert advice
Expert advice
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Top airlines
Cheapest • from $160 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
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Airline reviews
Airline reviews
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Nonstop flights
You can fly direct with Alaska Airlines. Average duration is 2h 27m
Direct flights
Direct flights
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Direct flights
Direct flights
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When to book
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 39% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 21% price drop
Most popular
Good to know
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Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Portland!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Ontario to Portland (ONT-PDX)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Portland 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 Ontario to Portland

Mon, Apr 27 - Sat, May 2
Frontier Logo
12:59 am - 11:52 am
ONT
-
PDX
10h 53m
1 stop
Frontier Logo
12:27 pm - 11:55 pm
PDX
-
ONT
11h 28m
1 stop
$160Frontier
Fri, Apr 24 - Tue, Apr 28
Frontier Logo
5:33 pm - 11:42 am
ONT
-
PDX
18h 09m
1 stop
Frontier Logo
12:38 pm - 11:55 pm
PDX
-
ONT
11h 17m
1 stop
$162Frontier
Mon, Apr 20 - Sat, Apr 25
Frontier Logo
12:59 am - 11:52 am
ONT
-
PDX
10h 53m
1 stop
Frontier Logo
12:27 pm - 11:55 pm
PDX
-
ONT
11h 28m
1 stop
$164Frontier
Fri, Apr 24 - Fri, May 1
Frontier Logo
5:33 pm - 11:42 am
ONT
-
PDX
18h 09m
1 stop
Frontier Logo
11:48 am - 11:55 pm
PDX
-
ONT
12h 07m
1 stop
$171Frontier
Thu, Apr 16 - Sun, Apr 19
Frontier Logo
7:49 pm - 8:59 am
ONT
-
PDX
13h 10m
1 stop
Frontier Logo
12:45 pm - 10:14 am
PDX
-
ONT
21h 29m
1 stop
$172Frontier
Wed, May 6 - Wed, May 27
Delta Logo
11:53 am - 6:52 pm
ONT
-
PDX
6h 59m
1 stop
Delta Logo
5:30 am - 12:35 pm
PDX
-
ONT
7h 05m
1 stop
$175Delta
Fri, Apr 24 - Sun, Apr 26
Frontier Logo
5:33 pm - 11:42 am
ONT
-
PDX
18h 09m
1 stop
Frontier Logo
12:45 pm - 1:10 pm
PDX
-
ONT
24h 25m
1 stop
$180Frontier
Mon, Apr 20 - Sat, Apr 25
Frontier Logo
12:59 am - 11:52 am
ONT
-
PDX
10h 53m
1 stop
Frontier Logo
12:27 pm - 11:55 pm
PDX
-
ONT
11h 28m
1 stop
$181Frontier
Fri, Apr 17 - Sun, Apr 19
Frontier Logo
5:33 pm - 11:42 am
ONT
-
PDX
18h 09m
1 stop
Frontier Logo
12:45 pm - 10:14 am
PDX
-
ONT
21h 29m
1 stop
$182Frontier
Fri, Apr 17 - Mon, Apr 20
Frontier Logo
5:33 pm - 11:42 am
ONT
-
PDX
18h 09m
1 stop
Frontier Logo
12:45 pm - 10:44 am
PDX
-
ONT
21h 59m
1 stop
$183Frontier
Booking Insights

KAYAK's insights & trends for Ontario to Portland flights

Get data-powered insights and trends into flights from Ontario to Portland to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Ontario to Portland?

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

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

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

Your flight ticket price will generally be cheaper if you fly to Portland on a Friday and more expensive on a Sunday. On your return trip to Ontario, you should consider flying back on a Saturday, and avoid Wednesdays for better deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Portland, 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 Ontario to Portland is July, where tickets cost $182 (return) on average. On the other hand, the most expensive months are March and November, where the average cost of round-trip tickets is $297 and $271 respectively.

How far in advance should I book a flight from Ontario to Portland?

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

To get a below average price on the flight from Ontario to Portland, you should book around 2 weeks before departure, which saves you about 39% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

Expert advice

Expert advice for your flight from Ontario to Portland

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Harriet Baskas

Harriet Baskas

Expert on Alaska Airlines

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Stefanie Waldek

Stefanie Waldek

Expert on Frontier

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Jennifer Simonson

Jennifer Simonson

Expert on ONT

Jennifer Simonson is driven by her lifelong commitment to exploring the globe. Her insatiable curiosity had led her to immerse herself into diverse locations like Oklahoma City and Pismo. Her hotel recommendations are the result of the myriad hotels she's stayed at across her travels. Along her journey, she cherishes engaging conversations with locals, indulging in the finest ice cream, trying her hand at surfing, and embarking on nature-filled hikes.

Gabriel Leigh

Gabriel Leigh

Expert on PDX

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Good to know

Low seasonFebruary
Cheapest flight$75
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly and prices are also 21% lower on average.
Flight from Ontario to Portland

When to book flights from Ontario to Portland

Are your dates flexible? Find out the best times to travel from Ontario to Portland 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.

Flights from Ontario to Portland: the best tips from KAYAK users' own experiences

Insights shared by verified travelers who flew the route from Ontario to Portland 
Verified travelerFlew with Alaska Airlines
ONT
-
PDX
Mar 2026
TSA security isn’t bad, sometimes gets crowded right before another flight goes out. Smaller airport but has many flight options.
Verified travelerFlew with Alaska Airlines
ONT
-
PDX
Oct 2024
Portland is a big airport, give yourself time.

FAQs for booking flights from Ontario to Portland

  • What is the cheapest flight from Ontario to Portland?

    In the last 3 days, the lowest price for a flight from Ontario to Portland was $75 for a one-way ticket and $160 for a round-trip.

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

    No, a passport isn't needed to fly from Ontario to Portland. However, local authorities might ask for an official ID.

  • Which airlines offer Wi-Fi service onboard planes from Ontario to Portland?

    All the following airlines offer inflight Wi-Fi service on the Ontario to Portland flight route: Alaska Airlines, Delta, Hawaiian Airlines, JetBlue, Air Canada, and American Airlines.

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

    The Boeing 737-800 Passenger/BBJ2 (winglets) is the aircraft model that flies most regularly on the Ontario to Portland flight route.

  • Which airline alliances offer flights from Ontario to Portland?

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

  • On which days can I fly direct from Ontario to Portland?

    There are nonstop flights from Ontario to Portland on a daily basis.

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

    The two airlines most popular with KAYAK users for flights from Ontario to Portland are Southwest and Alaska Airlines. With an average price for the route of $264 and an overall rating of 8.0, Southwest is the most popular choice. Alaska Airlines is also a great choice for the route, with an average price of $279 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from Ontario to Portland?

    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 Ontario to Portland.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Portland?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Portland from 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 Ontario to Portland?

    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 Portland with an airline and back to Ontario with another airline. Booking your flights between Ontario and PDX 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 Ontario to Portland?

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

KAYAK’s top tips for finding a cheap flight from Ontario to Portland

  • Looking for a cheap flight? 25% of our users found flights on this route for $219 or less one-way and $216 or less round-trip.

Prefer to fly direct from Ontario to Portland?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Ontario to Portland.
Find which airlines fly direct from Ontario Airport to Portland Airport, which days they fly and book direct flights.

Direct departures

Ontario to Portland

Monday

Alaska Airlines

Alaska Airlines

Tuesday

Alaska Airlines

Alaska Airlines

Wednesday

Alaska Airlines

Alaska Airlines

Thursday

Alaska Airlines

Alaska Airlines

Friday

Alaska Airlines

Alaska Airlines

Saturday

Alaska Airlines

Alaska Airlines

Sunday

Alaska Airlines

Alaska Airlines

See more direct flights

Direct returns

Portland to Ontario

Monday

Alaska Airlines

Alaska Airlines

Tuesday

Alaska Airlines

Alaska Airlines

Wednesday

Alaska Airlines

Alaska Airlines

Thursday

Alaska Airlines

Alaska Airlines

Friday

Alaska Airlines

Alaska Airlines

Saturday

Alaska Airlines

Alaska Airlines

Sunday

Alaska Airlines

Alaska Airlines

See more direct flights

Reviews of the top 5 airlines serving from Ontario to Portland

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Portland. 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 Ontario to Portland? 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
SouthwestOverall score based on 4334 reviews
7.0Food
7.5Entertainment
8.1Boarding
8.6Crew
8.0Comfort
Airline reviews

Southwest was greaat! The most expensive but the least upsetting for those we were flying to see.

10.0 ExcellentMartie, Mar 2026
LGB - BNA
Read more Southwest reviews

Southwest was greaat! The most expensive but the least upsetting for those we were flying to see.

Boarding was easy. The seats are small and fairly uncomfortable

The problem with the seat assignments is that there were a lot of rows in the front that were empty but my row at the back was full. Just not so pleasant.

Good but I prefer choose your own seat. With the new assigned seats they should board from the back I see no advantage to this new boarding. Just like every other airline

Flight boarded late after announcing on time boarding. Flight arrived only a little late despite late departure. Had trouble connecting to WiFi

The Southwest experience has definitely taken a dive from its early days. You can no longer deferentiate from other airlines. Air travel is too expensive. Southwest is no longer budget friendly. They have lost me as a loyal customer.

The charges were ridiculous for an hour flight and the turbulence was very scary.

The seats are now more narrow. I paid for front row the seats in the front are even more narrow than before.

The wifi on the plane is great. The only issue that I have is that I prefer an aisle seat and on my trips this week, I was either in the middle or window. If we can work to secure aisle seating, I will be thrilled. Nice trip.

Great flight but super high price. Glad it was a business trip and not personal

Flights were on time, which made making connections do much better. Well organized

My only complaint was how far it was from plane to baggage claim

Not bad. Due to not buying a seat, on the way back, my seat was not assigned till 2 hrs before the flight left. Got me worried I wouldn’t have a seat.

SBP to PDX 2/17/2026. One person ahead of us at the counter. One ahead of is at TSA. First to board. First row, first class. First to be served. Food and service very good. First off the aircraft. Flight was nice other than some moderately hard bumps on climb out (please find a way to control that!). Air Force landing (none of that Navy slam you to the deck stuff). Wheel chair at the bottom of the ramp waiting for my wife. Luggage out quickly, walked right up to the parking shuttle bus. First stop on the bus. I like the EMB 175 aircraft. This was as close to a perfect flight as I will ever see. Bravo!

Santa Rosa Airport is the best! Glad to have experienced it.

Delay for switching planes. Then delay after delay (mechanical) after boarding so that we were almost 3 hrs late, getting in at 230am. Crew was good.

The Alaska Airlines app made it very difficult to find my boarding pass. It was very frustrating to use! The flight itself was flawless.

You need categories to denote when food and entertainment are not available.

Alaska is a great airline. Unfortunately, our flight was canceled in a really late hour and it caused a lot of hardship in my travel process.

More comfortable than the flight to Los Angeles. But food was mediocre again. Attendants kind and courteous.

I took seat 15A in anticipation of window seat, there is no window.

Flight late, the waited for a long time for “personal” to arrive at gate to dock the plane in Rochester. So annoying. This flight was expected, why aren’t personel available for the jet bridge?

My recent experience was excellent on Delta! I flew with Delta Comfort and I was really comfortable in my seat. I enjoyed the in-flight service. The flight attendants were so friendly and hospitable. I love the snack on the flight as well. This was my first time flying on Delta and I will definitely consider flying with them again.

Delta needs to step its game up get a more reliable internet service. Internet service was non-existent for this flight.

My flight was canceled on Sunday. Rebooking took three hours. Had to pay for accommodations another night. New flight was delayed for 5 hours, all that was sent was a 12 dollar food voucher, which doesn’t tell you how to use it. Then when we landed we had to sit on the plane for an hour before we could get off.

I was in first class and literally the men behind me were so aggressively loud I moved myself to economy. This has become so common on Delta - people using audio without headphones, and men on 12am / late night flights drinking and yelling to talk to each other which prevents anyone around them from resting. Pretty crazy to have to move from first to economy (poorer service, less comfort...). Wild wild. Looking into other airlines.

Flight was delayed by 3-hours and their fix was… complimentary pretzels.

The crew, and fellow passengers, were super gracious and kind. There seemed to be plenty of bin space even though the plane was full. It’s nice to get a glass of wine with dinner in Premiere seating, and there was a lot of food.

Everything I mentioned earlier - the airbus was more comfortable indeed and the experience was further enhanced.

The plane was an older model, so it wasn’t as comfortable as others. The flight attendants were not helpful during onboarding. It was a full flight so there was chaos finding space for baggage.

Fabulous if you have a portable wheelchair. They can store it in the galley and you can just walk out with it. Really nice and the flat seats are just incredible, very nice. iPads for movies, also pretty nice,

The crew were exceptionally nice and accommodating. My wife was tired after the flight from Haneda, Tokyo. They let her sleep and served her dinner later after she woke up, before we landed in PDX.

No charging outlets worked. Other than collecting trash attendants didn’t come around. No one could hear flight attendants announcements during the flight. Seat pads were horrible. Sitting on a board for 5 hours. What happened to Hawaiian airlines comfort, hospitality, and extras? Our pilots did an excellent job trying to minimize turbulence and incredible job in landing in windy conditions.

I like that if they asked you to checked in a bag at the gate they give you priority to board

Alaska was fine as usual. My frustration came with accessing boarding passes. On the first trip, I could only get one to print ans took a picture of the second one. On our return trip, the system was down? Friends who booked directly with Alaska had theirs process. I even tried the 800 number and had others try it too. It said something in Spanish and hung up. The agent at the airport succeeded.

I had to cancel the flight because with a 3 hour delay for 'unexpected maintenance' in getting to LAX, I couldn't connect to an overseas flight that I had booked on Scandinavian Air.

I received several emails about my 3:10 flight. When I showed up to the airport at 12:30 to check my bags I was told the flight was actually at 1 pm. They grudgingly rebooked me for a flight at 5:22 to Vegas to get a connecting to LAX. I did find the gate for my original 3:10 flight but they were booked. I proceeded to receive status updates and gate change information for the 3:10 flight, even though I was apparently never supposed to be on that flight

My flight was delayed three hours and then cancelled. The gate agent proceeded to rebook me in a middle seat without telling me and I was placed between two large individuals who did not fit in their own seats and instead took up most of mine. It was an awful experience.

The food options were limited and very specific. Some type of entertainment option for a 4.5 hour flight would have been nice.

The Kayak confirmation number did not work for checking in the day before. I checked in at 8.30 using my ticket number. When I arrived at the airport, I was informed that the flight was overbooked, and since I had checked in late, I did not have a seat. The Next flight was not until ten PM. I called my wife, who had been taking care of our kids all weekend, and she was upset, calling me a liar and telling me to stay in SD. It turned my weekend getaway into a nightmare! I blame the Kayak website and will not book flights using your app in the future.

Remind customers of the need to have passport or new ID for boarding.

The flight never took off and we spent 7 hours at the airport

It was ok. It was expensive to check 2 bags ($75.00 per bag), and then it took a long time to wait for shuttle to take us from one terminal to the terminal where the plane was taking off at LAX. And all of this for a flight where we had to pay for any food or drink that was not water.

When I wanted to check in 3 hours prior to boarding time, the employees mentioned “a little over an hour delay” so I waited for an hour then I went to go look for food in the terminal and most people from that flight were in the same area looking for food. Finally I decided after food to check to see if it’s anytime closer and now it’s 2 mins until boarding closes?! What are you kidding me? I didn’t receive anything via sms about boarding now nor via email or on the intercom. I luckily made it through, barely, and then there’s no room for my carry on mind you I’m in the very first row so I had to place my purse in one further row back and my carry on sections down. Not sure who pays for better seats to get your stuff placed all over the plane but that was the worst experience I’ve ever had flying with anyone.

This airline sucks. They offer low rates then charge you for everything, the app does not work well, the seats are the most uncomfortable. Maintenance issues on the flight, and you still have to sit through their credit card commercials. People are nice enough but does not make up for overall poor experience.

The delay was ridiculous because nary a word escaped from the gate attendant regarding our flight status. It was a complete joke.

Cancelled flight after I arrived at airport after 75 min drive and parking. Next flight was 4 days in the future. Had to scramble and buy a much more expensive flight on another carrier.

I liked the turn-style feature at gate 209B at LAX. Very efficient process. The gate staff also made several, clearly directed announcements so I felt very informed.

The seats were awful, hard plastic covered in sheet vinyl. The airline tries to scam you into paying extra to get seat together when the flight wasn’t full. They were going to separate a family with young children but my wife who had a row to herself gave up her seat so the young mom could be with her young boys. I’m never giving this airline my money again.

It was a short flight so no food or entertainment….

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

Information on your arrival and departure airports