PDX - ONT

$47 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 6/13. 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

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These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to Ontario.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to Ontario.
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Flights Deals

Cheap Flight Deals from Portland to Ontario (PDX-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.

Recent round-trip flight deals from Portland to Ontario

KAYAK's recommended round-trip deals from the most popular airlines that fly from Portland to Ontario.
Discover the best prices for you by selecting your travel dates on KAYAK.
Frontier Logo
12:17 pm - 2:40 pmPDX-ONT
2h 23mnonstop
Frontier Logo
3:35 pm - 5:58 pmONT-PDX
2h 23mnonstop
$76Frontier
Find Deal
Sat, Aug 9 - Sat, Aug 16
Frontier Logo
12:18 pm - 2:38 pmPDX-ONT
2h 20mnonstop
Frontier Logo
3:33 pm - 5:58 pmONT-PDX
2h 25mnonstop
$77Frontier
Find Deal
Sat, Jun 21 - Sat, Jun 28
Alaska Airlines Logo
2:50 pm - 5:06 pmPDX-ONT
2h 16mnonstop
Alaska Airlines Logo
5:55 pm - 8:26 pmONT-PDX
2h 31mnonstop
$157Alaska Airlines
Find Deal
Sat, May 31 - Tue, Jun 3
Alaska Airlines Logo
9:41 pm - 11:57 pmPDX-ONT
2h 16mnonstop
Alaska Airlines Logo
4:45 pm - 11:44 pmONT-PDX
6h 59m1 stop
$167Alaska Airlines
Find Deal
Sat, May 24 - Sat, May 31
Delta Logo
5:35 am - 11:04 amPDX-ONT
5h 29m1 stop
Delta Logo
11:44 am - 4:59 pmONT-PDX
5h 15m1 stop
$177Delta
Find Deal
Wed, May 21 - Tue, May 27
Delta Logo
5:40 pm - 10:35 pmPDX-ONT
4h 55m1 stop
Delta Logo
6:00 am - 10:45 amONT-PDX
4h 45m1 stop
$187Delta
Find Deal
Sat, May 24 - Mon, May 26
United Airlines Logo
5:30 am - 12:14 pmPDX-ONT
6h 44m1 stop
United Airlines Logo
6:00 am - 12:22 pmONT-PDX
6h 22m1 stop
$243United Airlines
Find Deal
Sun, Jun 1 - Wed, Jun 4
United Airlines Logo
3:42 pm - 10:59 pmPDX-ONT
7h 17m1 stop
United Airlines Logo
6:41 pm - 12:30 amONT-PDX
5h 49m1 stop
$248United Airlines
Find Deal
Fri, May 23 - Tue, May 27
Southwest Logo
6:00 am - 10:05 amPDX-ONT
4h 05m1 stop
Southwest Logo
5:30 am - 1:35 pmONT-PDX
8h 05m2 stops
$297Southwest
Find Deal
Mon, Jul 14 - Wed, Jul 23
Southwest Logo
4:20 pm - 10:50 pmPDX-ONT
6h 30m2 stops
Southwest Logo
8:05 pm - 12:15 amONT-PDX
4h 10m1 stop
$311Southwest
Find Deal
Tue, Jun 10 - Fri, Jun 13
Expert advice

Expert advice for your flight from Portland to Ontario

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
Frontier

Frontier's Economy Bundle includes a carry-on and seat choice, ideal for budget travelers.


Opt for Premium Bundle for priority boarding and extra legroom, just $20 more than Economy.

Read more about Frontierby Stefanie Waldek
Alaska Airlines

Alaska's Wine Flies Free program allows free wine case check-in from select airports.


Enjoy free texting on Alaska flights with in-flight Wi-Fi, ideal for staying connected.

Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on Frontier

Stefanie Waldek

Stefanie Waldek

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.

Read more
Harriet Baskas

Harriet Baskas

Expert on Alaska Airlines

Harriet Baskas

Harriet Baskas

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.

Read more
Useful Info

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.

Find cheap flights to Ontario
Find cheap flights to Ontario

Planning a trip from Portland to Ontario? KAYAK’s data-powered insights will help you find cheap flights. Learn the best time to fly, how early to book your ticket, and other tips to secure great prices.

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.

For Portland to Ontario, Saturday is the cheapest day to fly on average and Sunday is the most expensive. Flying from Ontario back to Portland, the best deals are generally found on Tuesday, with Sunday being the most expensive.

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, where tickets cost $125 (return) on average. On the other hand, the most expensive months are March and February, where the average cost of round-trip tickets is $370 and $256 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure 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 average of all the values for each week.

To get a below average price on the flight from Portland to Ontario, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 4 weeks before departure.

Good to know

Low seasonJanuary
High seasonMay
Cheapest flight$47
Best time to beat the crowds but there is an average 8% increase in price.
Most popular time to fly and prices are also 11% lower on average.
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

  • Does ONT have an on-site car rental facility?

    ONT does not have an on-site car rental facility. However, it does have an off-site car rental facility which is connected to the airport by a free airport shuttle service. This car rental facility houses car rental agencies like Alamo, Budget, Avis, Enterprise, Thrifty, Payless, and National.

  • Is there any other airport that serves Ontario apart from ONT?

    Apart from ONT, Ontario is also served by Los Angeles International Airport (LAX). There are no direct means of public transportation between Ontario and LAX. Hence, to cover the distance between these two points, you'll first need to board a taxi or bus from the airport to Los Angeles' city center. At the city center, you can then board a bus or a train to Ontario.

  • Does PDX have any unique services?

    At PDX, you can enjoy relaxing spa services at The Dragontree Spa. Open from 9 am to 8 pm from Sunday to Friday and 9 am to 6 pm on Saturdays, this spa offers a wide range of spa services at affordable rates. Given that it boasts experienced professionals, you'll receive quality services at this Concourse C spa.

  • Does PDX have a lounge?

    If you'd like to relax in a lounge at PDX as you wait for your flight to ONT, you can check out the amazing Alaska Lounge. Situated near Gate C5 in Concourse C, this lounge boasts comfortable seats, clean washrooms, snacks, and beverages. Given that it is not affiliated with any airline, you can enter this lounge regardless of the airline you're traveling with, provided you pay its entry fee.

  • 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 $47 for a one-way ticket and $76 for a round-trip.

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

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

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

    On your way to Ontario, you’ll fly out from Portland. You’ll be landing at Ontario.

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

    Hawaiian Airlines, Alaska Airlines, Delta, and American Airlines offer inflight Wi-Fi service on the Portland to Ontario flight route.

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

    The Embraer 175 is the aircraft model that flies most regularly on the Portland to Ontario flight route.

  • Which airline alliances offer flights from Portland to Ontario?

    oneworld is the only airline alliance operating flights between Portland and Ontario.

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

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

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

    The two airlines most popular with KAYAK users for flights from Portland to Ontario are Alaska Airlines and Southwest. With an average price for the route of $279 and an overall rating of 8.0, Alaska Airlines is the most popular choice. Southwest is also a great choice for the route, with an average price of $324 and an overall rating of 8.0.

  • 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.

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

  • Looking for a cheap flight? 25% of our users found flights on this route for $97 or less one-way and $168 or less round-trip.
  • On the date you're scheduled to fly to Ontario, you should aim to be at Portland International Airport (PDX) at least 2h ahead of your departure time. Getting to the airport this early will enable you to go through the airport's security checkpoints in time for your flight. It will also allow you to check out the superb destinations available at the airport.
  • While waiting for your flight to Ontario International Airport (ONT), you can privately breastfeed your baby. This is because this remarkable airport features clean, spacious, and well-equipped breastfeeding rooms near the airport South Lobby and Gate D2.
  • In case you're traveling with older kids, you can let them enjoy themselves in one of PDX's children's play areas. Located near Gate C17 in Concourse C and gate D7 in Concourse D, these play areas feature child-proof playgrounds and various toys.
  • At ONT, you can easily withdraw the cash you need, as this airport features several ATMs. The ATMs are located on the Upper and Lower levels of Terminals 2 and 4, near the front entrance of the International Terminal and in the Rental Car Facility.
  • If you'd like assistance getting emergency housing, transportation assistance, or wiring some cash, visit Traveler's Aid, a non-profit organization that assists stranded and distressed passengers. In order to cater to as many people as possible, this organization has two branches at ONT. One is between the baggage claim and escalator in Terminal 2, while the other is a short distance from the baggage claim in Terminal 4. Both operate from 9 am to 9 pm.

Prefer to fly direct from Portland to Ontario?

Find which airlines fly direct from Portland Airport to Ontario Airport, which days they fly and book direct flights.

Direct departures

Portland to Ontario

Monday

Alaska Airlines, British Airways, Frontier, +1 more

Alaska Airlines, British Airways, +2 more

Tuesday

Alaska Airlines, British Airways, Hawaiian Airlines, +1 more

Alaska Airlines, British Airways, +2 more

Wednesday

Alaska Airlines, British Airways, Hawaiian Airlines

Alaska Airlines, British Airways, +1 more

Thursday

Alaska Airlines, British Airways, Frontier, +1 more

Alaska Airlines, British Airways, +2 more

Friday

Alaska Airlines, British Airways, Frontier, +1 more

Alaska Airlines, British Airways, +2 more

Saturday

Alaska Airlines, British Airways, Hawaiian Airlines, +1 more

Alaska Airlines, British Airways, +2 more

Sunday

Alaska Airlines, British Airways, Frontier, +1 more

Alaska Airlines, British Airways, +2 more

See more direct flights

Direct returns

Ontario to Portland

Monday

Alaska Airlines, Frontier, Hawaiian Airlines

Alaska Airlines, Frontier, +1 more

Tuesday

Alaska Airlines, Hawaiian Airlines, Frontier

Alaska Airlines, Hawaiian Airlines, +1 more

Wednesday

Alaska Airlines, Hawaiian Airlines

Alaska Airlines, Hawaiian Airlines

Thursday

Alaska Airlines, Frontier, Hawaiian Airlines

Alaska Airlines, Frontier, +1 more

Friday

Alaska Airlines, Frontier, Hawaiian Airlines

Alaska Airlines, Frontier, +1 more

Saturday

Alaska Airlines, Hawaiian Airlines, Frontier

Alaska Airlines, Hawaiian Airlines, +1 more

Sunday

Alaska Airlines, Frontier, Hawaiian Airlines

Alaska Airlines, Frontier, +1 more

See more direct flights
See more direct flights

Top 5 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
Alaska AirlinesOverall score based on 9968 reviews
7.1Food
7.1Entertainment
8.5Crew
7.9Comfort
8.2Boarding
Airline reviews

Although both planes (flights) had mechanical issue delaying both of my flights, the crew members handled everything with ease. Both flights had the smoothest take off and landing. I opted to upgrade my seat to first class and really lucked out getting the seat at the very front of the plane. Awesome treat to myself. I really enjoyed my flight.

8.0 ExcellentAnonymous, Mar 2025PDX - FAT
Read more Alaska Airlines reviews

Although both planes (flights) had mechanical issue delaying both of my flights, the crew members handled everything with ease. Both flights had the smoothest take off and landing. I opted to upgrade my seat to first class and really lucked out getting the seat at the very front of the plane. Awesome treat to myself. I really enjoyed my flight.

The staff from check-in counter to the flight crew were great. Flight was right on schedule. 10/10

Changed flight from San Fran to Seattle Then with a Delayed takeoff barely made my connection Waited over an hour for luggage 😜

Alaska Airlines needs more bag tag kiosks and bag check-in stations in Seattle. A single entry point for the bag tag kiosks would be helpful. This alleviates lines forming at each individual kiosk, which causes traffic jams for people passing through.

Very comfortable - thanks. Only small criticism was the delay in disembarking caused by the passengers in the front two rows chatting to the cabin crew.

Probably one of the best flights I’ve had! From entering the airport, to boarding to landing.

Plane had a maintenance problem two hours into the flight and we had to turn around. Alaska was nice to put us up in the Hilton in LAX but the cost of food in the city was WAY higher than our vouchers and the hotel had no continental breakfast. We ended up spending over $100 on food for our family in addition to the vouchers.

Delays, delays, delays.... (and) Told no room for carry on after boarding B Group and told to drop off our carry on at door to be checked in instead. There was plenty of room left in the overheads above our seats right up to the end of boarding!!!!

Finally get a snack n drinks! Just like the good ole days!

Wonderful! The Alaska call center representative was really helpful. I accidently made a mistake of picking a flight option for another day. She was extremely helpful. My daughter had a nose bleed during the flight - the crew helped with an ice pack. I wish they had checked afterwards.

It was a perfect flight in all aspects! Both legs!

Boarding process, crew were good. But the seats were so uncomfortable that was all I could focus on. I literally had to sit forward so that all 3 of us could fit in row. I will try to avoid Southwest in the future for any flights over 60 minutes.

Great flight, 47 passengers on a 180 seat plane. Stewardess was pleasant and cheerful.

Great experience flying Southwest. The crew was really kind and helpful, and very friendly with our toddler.

Plane late from DC to Austin 30 minutes. Crew made up much of the time enroute to San Diego.

Fine, but how to board on SW versus othrr airlines, is just lame. Goood staff though and all was solid otherwise.

Was as expected. Crowed planes. Too many carryons delaying takeoff. But the ride only took an hour and saved me a lot of time SFO is a not a great airport.

Was as expected. Crowed planes. Too many carryons delaying takeoff. But the ride only took an hour and saved me a lot of time SFO is a hell hole of an airport. It is the new LaGuardia. Everything Cobbled together. Security gates closed. Terri directional signage

It was really nice! I appreciate the gate attendant allowing families with small children to board early on in the process… that was very helpful! The internet service didn’t work with the app I was trying to use even though I paid the $8… other than that it was great! Oh and I should’ve asked for the whole cranberry cocktail can. That cup was about 2 sips…

I will be flying again Southwest Airlines. Friendly crew, comfortable and affordable.

This had nothing to do with Delta… The flights were on time and flawless. The service was excellent. We purchased seats in (aisle/middle) comfort plus since this was a cross country flight. Unfortunately, the woman seated at the window was 300+ pounds and, as might be expected, covered up about a third of the middle seat also. there was absolutely nothing that Delta could have done about that… I just don’t know what the answer should be. If you purchase a seat, you should should be able to use the entire seat and not just the portion that someone else is not sitting/oozing in. Disappointing…there should be something that could be done….I'm just not sure what solution could be.

Seats are much much more comfortable than United, which is what I usually fly

If I pay extra for "comfort+" I expect leg room where I can stretch my legs. I was seated with an attendant's seat blocking my feet. Knee space was fine but my feet had less room than the non-"comfort+" seats. Also, don't go cheap on food when you have flights of 3+ hours. It's insulting.

Only one side of the heafphone jack work. Crew was friendly and helpful.

Great. Flight departed early and arrived early. Deplaning and baggage claim ww were quick.

My seat had no padding, it was literally plywood with a plastic cover. I could not change seats on my 10 hour flight. My excitement for this trip helped me deal with the pain.

They separated our seats and moved us to the back of the plane. Hundreds of dollars and thousands of miles used and this was my platinum member experience.

AC barely worked on a 50 minute flight. It was very warm the whole flight. Flight was very bumpy and hard landing.

Got on the plane and then needed to deboard the plane because they didn’t have any pilots?

The flight was canceled two hours before departure, it took over five hours to rebook us on another flight.

A bit rush for transit. Food and entertainment are not available

The gate was too far away for the connecting flight

Generally good. The aisles have gotten narrower which can slow down boarding. Flight crew was great! Healthier complimentary snacks would be appreciated. Due to earthquake in San Francisco we had to circle in air space for a bit but then had a smooth landing. I laud the flight crew for their patience ;)

The agents was very rude and they charged me $50 for a carry-on bag saying that it was too big and then I saw someone going on a plane with the same size bag as me

For the most part united was a good experience, how ever when they came by with the snacks and water, they completely passed by my wife and I. As we were in separate rows. On a 5 hr flight we were not offered water

Fantastic crew. Flight was delayed at last minute but we were given updates every 20 minutes and the crew was so friendly and considerate. I miss the touch screens on the back of the seats, wish they would bring that back though.

Awful. Worst airline I have ever been on. Crew were among the rudest people I have ever dealt with. United staff members were rude and disrespectful. My flight was delayed, causing me to miss a connecting flight. I understand things happen, but when staff start lying about what actually happened, that is when I have an issue. Just be honest, really it isn’t that hard. I’m being very honest with this review and I don’t find this difficult what so ever. In fact, because of United Airlines, my Christmas holiday was off to a really rocky start. As someone who has traveled across the world, it has only been United that I have had a truly awful experience.

Boarding always seems a bit chaotic. Seat spacing could leave more for leg room.

Good flight. On time. Boarding and seating was easy. Crew were really friendly, yet professional. Bathroom (by cockpit) was small but serviceable. Some the seats were showing some notable wear & tear, but were comfy. Very happy UA customer. TY! 🤛🏽💗

We arrived early and finally made it to our gate almost an hour after.

The reps working at the airport counter were dumber than a second coat of paint.

My costume jewelry was stolen out of my bag. Got to airport and my bag weighed 45 pounds- 5 pounds over cost me $100 Long lines in tier one. No entertainment No WiFi no free drinks or snacks

Not very good. Paid in excess of $400 for assigned seating for my family and that was not provided. I want that money back.

The seats were hard molded plastic covered in plastic vinyl. And the scam to charge people extra to sit together. Don’t they know we can just ask someone to trade seats. And watching the staff separate young children from parents… super classy. We had to guilt them into offering up our seats. This companies policies suck. Don’t give them your money.

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….

Seats are uncomfortable but price is good. Guess I can put up with misery for four hours.

I’ve never traveled on Frontier before. If you want basic, no frills, friendly service at great prices then give them a fly!

Everything went as planned. Crew was great. Seats were still not that comfortable.

No frills for sure. No gate announcements about flight delay, not even water to drink on the flight.

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

Information on your arrival and departure airports

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