ONT - PDX

$45 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 6/24. 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

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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Flights Deals

Cheap Flight Deals 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.

Recent round-trip flight deals from Ontario to Portland

KAYAK's recommended round-trip deals from the most popular airlines that fly from Ontario to Portland.
Discover the best prices for you by selecting your travel dates on KAYAK.
Frontier Logo
3:35 pm - 5:58 pmONT-PDX
2h 23mnonstop
Frontier Logo
12:17 pm - 2:40 pmPDX-ONT
2h 23mnonstop
$75Frontier
Find Deal
Tue, Jul 29 - Sat, Aug 2
Frontier Logo
3:35 pm - 5:58 pmONT-PDX
2h 23mnonstop
Frontier Logo
12:17 pm - 2:40 pmPDX-ONT
2h 23mnonstop
$76Frontier
Find Deal
Sat, Jul 12 - Tue, Jul 15
Alaska Airlines Logo
10:00 am - 12:22 pmONT-PDX
2h 22mnonstop
Alaska Airlines Logo
7:00 am - 9:17 amPDX-ONT
2h 17mnonstop
$157Alaska Airlines
Find Deal
Wed, May 28 - Tue, Jun 3
Alaska Airlines Logo
10:00 am - 12:22 pmONT-PDX
2h 22mnonstop
Alaska Airlines Logo
4:00 pm - 10:46 pmPDX-ONT
6h 46m1 stop
$161Alaska Airlines
Find Deal
Sat, May 31 - Sat, May 31
Delta Logo
6:00 am - 4:59 pmONT-PDX
10h 59m1 stop
Delta Logo
9:10 am - 2:15 pmPDX-ONT
5h 05m1 stop
$220Delta
Find Deal
Tue, May 27 - Sat, May 31
Delta Logo
6:00 am - 4:59 pmONT-PDX
10h 59m1 stop
Delta Logo
5:40 pm - 10:35 pmPDX-ONT
4h 55m1 stop
$230Delta
Find Deal
Tue, May 27 - Thu, Jun 5
Southwest Logo
7:35 pm - 1:05 amONT-PDX
5h 30m1 stop
Southwest Logo
5:20 pm - 9:50 pmPDX-ONT
4h 30m1 stop
$232Southwest
Find Deal
Fri, Jun 6 - Mon, Jun 9
United Airlines Logo
6:00 am - 12:22 pmONT-PDX
6h 22m1 stop
United Airlines Logo
3:42 pm - 10:45 pmPDX-ONT
7h 03m1 stop
$252United Airlines
Find Deal
Wed, Jun 4 - Fri, Jun 6
Southwest Logo
8:05 pm - 12:15 amONT-PDX
4h 10m1 stop
Southwest Logo
5:20 am - 12:50 pmPDX-ONT
7h 30m1 stop
$262Southwest
Find Deal
Thu, Jun 19 - Sun, Jun 22
United Airlines Logo
1:45 pm - 8:53 pmONT-PDX
7h 08m1 stop
United Airlines Logo
7:54 am - 12:24 pmPDX-ONT
4h 30m1 stop
$267United Airlines
Find Deal
Fri, May 16 - Mon, May 19
Expert advice

Expert advice for your flight from Ontario to Portland

 
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 bag and no change fees, ideal for budget travelers.


Frontier's Premium Bundle offers priority boarding and extra legroom for just $20 more than Economy.

Read more about Frontierby Stefanie Waldek
Alaska Airlines

Alaska Airlines offers a 20-minute baggage guarantee, ensuring quick baggage claim or compensation.


Alaska's Premium Class offers priority boarding and complimentary drinks on flights over 350 miles.

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 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.

Find cheap flights to Portland
Find cheap flights to Portland

Planning a trip from Ontario to Portland? 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 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 Tuesday and more expensive on a Sunday. On your return trip to Ontario, you should consider flying back on a Saturday, and avoid Sundays 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 June, where tickets cost $148 (return) on average. On the other hand, the most expensive months are March and February, where the average cost of round-trip tickets is $247 and $217 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. For the absolute cheapest price, our data suggests you should book 4 weeks before departure.

Good to know

Low seasonJanuary
High seasonJuly
Cheapest flight$45
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly and prices are also 13% 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 FrontierONT-PDXOct 2024
ONT by far the best airport in SoCal.
Verified travelerFlew with Alaska AirlinesONT-PDXOct 2024
Portland is a big airport, give yourself time.
PolarFlew with Alaska AirlinesONT-PDXAug 2024
Bring a jacket! It is much cooler in the Pacific Northwest than southern California!

FAQs for booking flights from Ontario to Portland

  • How can I fly from ONT to PDX?

    Alaska Airlines is one carrier that operates a non-stop flight between ONT and PDX. Frontier, United Airlines, Delta, and Alaska Airlines are carriers that travel from ONT to PDX with one stop. Layover cities include Seattle (SEA) and Las Vegas (LAS). Delta, American Airlines, United, and Alaska Airlines all operate flights from ONT to PDX with two stops.

  • Where can I park my car at ONT before my flight to PDX?

    You can pre-book your parking spot at ONT and save some money. The most affordable deal for parking long-term at ONT is Lot 5. It is not within walking distance to the terminals, but shuttles run to the terminals regularly.

  • Does ONT have animal relief areas?

    ONT provides animal relief areas both inside and outside the terminals. The pre-security pet relief areas can be found outside the far ends of the terminal buildings. The post-security areas can be found at Gate 210 in Terminal 2 and Gate 410 in Terminal 4. Each animal relief station provides drinking water for the animal, plastic bags, and a trash can so passengers can clean up after their four-legged friend.

  • Does ONT have a USO?

    The Bob Hope USO lounge at ONT proudly welcomes active-duty members of the US military and their families. This lounge is open from 6 am until 10 pm every day and is located in the Administration Building, which is across from Parking Lot F. There is a free shuttle service between the USO and Terminals 2 and 4. Some amenities of this lounge include a lounge for movies and TV shows, a library, an internet cafe, luggage storage, a game room, a family area, a canteen, a map room, an outdoor patio area, and travel assistance.

  • 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 $45 for a one-way ticket and $75 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?

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

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

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

  • Which airline alliances offer flights from Ontario to Portland?

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

  • 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, Alaska Airlines or Southwest?

    The two airlines most popular with KAYAK users for flights from Ontario to Portland are Alaska Airlines and Southwest. With an average price for the route of $260 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 $280 and an overall rating of 8.0.

  • 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 $118 or less one-way and $191 or less round-trip.
  • Ontario International Airport (ONT) is located in Ontario, California, in the United States. Do not confuse this airport by mistakenly thinking it is in Ontario, Canada—it is not. ONT serves as a hub for FedEx Express and UPS Airlines and a focus city for Amazon Air. Portland International Airport (PDX), located in Portland, Oregon, is a secondary hub for Alaska Airlines and Horizon Air.
  • If you want to wait for your plane at ONT in style and comfort, you can pay at the door to enter the Escape Lounge. This posh lounge has two locations in ONT, one in Terminal 2 and one in Terminal 4.
  • There are two Baby Care Facilities at ONT, where moms can breastfeed in private if they choose, pump, or change the baby's diaper. These rooms are located at Gate 207 in Terminal 2 and Gate 407 in Terminal 4.
  • On your way out of PDX, consider visiting the Hollywood Theater, located in Concourse C. This is a 22-seat theater that shows short films by Oregon filmmakers for free. Each film has a running time of 10 min or less.
  • If you are traveling with children who are antsy when they get off the plane from ONT, try taking them to one of two children's play areas at PDX. One of these indoor playgrounds is located Airside at Gate C17. The other is located Landside at the D/E Terminal junction.

Prefer to fly 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, 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

Direct returns

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
See more direct flights

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

I got the last seat on the plane, in the back in the corner against the window, and I paid a competitive price for my ticket several weeks before the flight.

2.0 MediocreAnonymous, Apr 2025SNA - PDX
Read more Alaska Airlines reviews

I got the last seat on the plane, in the back in the corner against the window, and I paid a competitive price for my ticket several weeks before the flight.

Everything was good. However, the selections of movies and TV shows were boring and unexciting. It was disappointing.

Personal demeanor not good on flight returning to LAX..Great and superb on the way to Portland

Very helpful with my mother who needed a wheelchair at both ends and everything went as expected

The flight was great, the crew was great. Our complaint was that there are no TV screens built into the seats. We used our tablets but drained my battery just watching a movie. The movie and TV selection were okay but not great.

The Crew was super nice but the plane was subpar at best. Filthy in some aspects. Internet only worked half the time and not with everything.

They were all very kind, but misinformed. We came from Idaho to Spokane, Washington and were told that my husband and I could get passes to sit with William until his flight took off. (William has special needs.) When we got to the airport we were told only one of us could sit with William, so my husband and I were separated for 2 hours as I sat with William. What is WORSE . . . is I asked for a meet and assist in Portland and they NEVER showed up. NOR did they call me to tell me they hadn't met him. William's grandmother in Portland is disabled and can't walk into find him. Fortunately, some kind citizens helped him to find the meeting point with me on the phone in terror. I have a heart condition, complete with prior heart attack, this type of customer service is UNACCEPTABLE.

Crew was overly aggressive with rules enforcement and not friendly in general.

Loved the crew and everything went without a hitch! We took our dog for the first time and I was a little nervous but the crew was fantastic!

It was fine. Very friendly crew. Smooth flight. Landing was a little rough though.

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

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

I liked the crew member who gave flight instructions on "in case of a problem:. The seats are so small that only a young teenager could sit in middle seat.

Great flight staff. Ease of boarding. Overall, very uneventful and easy trip.

Employees were kind and funny, as always! Flight was late but no announcements were made for people with tight connections to help them transition quickly. No service due to turbulence.

I recently flew Southwest from San Jose to Honolulu. I was very impressed with the flight crew, especially the flight attendant in charge of the front of the plane. She came through the aisle at least five times for drinks and water, and two times for snacks. I have not seen such service since I flew first class. Also, for the first time, they gave us the correct baggage claim number, and the luggage came out quickly. I can't wait for Southwest to have assigned seating! I absolutely hate the Cattle Call boarding procedure and the mad dash to get seats and overhead bins. However, the boarding was efficient.

We had a nice flight. Boarding was easy, our seats were comfortable and the on board service was pleasant.

Service was great, boarding and exiting went smoothly, and the flight was very pleasant.

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

Delta flight was on time, seats were comfortable, and crew was nice.

Thank you for not flipping the plane on the run way. You guys get a 5 star rating for the flight!!!

Boarding is, as it always is… horrible. Gate lice. Slow moving zones. Too many people with carry ons

It was terrible, if they ran flights on time it would make a big difference.

Delta seems to be improving in many areas, except they are super bad with the food available. Bring back normal food service on long flights.

I actually received a notification from kayak on email but not one by text from Delta when my departure gait changed and I almost missed my flight

The crew on this leg continue to be extremely helpful with my wife’s mobility issues. They also came by many many times to ensure we were comfortable and had drink some food.

New boarding doesn't make sense. Filling front first is slow.

Delta flight was great from the check in all the way to arrival. However, I had a very bad experience. I requested a wheelchair and the wheelchair employee that went to pick me up from the plane in Boston to bring me to the baggage claims told me I have to pay him. I was under the impression that it was a free service and I usually give tips but the person forced me to pay and since I said no because I was upset with his demand when my daughter walked in to pick me up he demanded payment from my daughter who paid him thinking maybe now it is a charged service.

Horrible. Grateful to be alive but spent 13 hours at airport only to return back to my familys house and flight changed to next day. They tried to fix a part on plane, had no back up plane and after 10 hours , reattempted the flight and it STILL wasn't fixed. We got a meal voucher and rescheduled flight but there should be some other compensation for the 15 hours spent in airport

The departure gate was changed from C1 to B18 but it was never announced at the C1 gate nor did I receive any email or text message or phone call about the gate change. I was in a window seat. In the other two seats next to me were Mr. Rotund and Ms. Rotunda, a youngish couple. Just the two of them should have booked three seats. I was smashed up against the wall and window for five hours. Overall, I'd say my flight sucked. Wouldn't you?

I couldn't get checked in 24 hours before either leg of my flight. I tried both my Alaska and Hawaiian codes on both apps.

We moved from the international terminal to a new location. I think there are still some bugs to work out . We didn’t receive check in notification and had to scramble to find it but i think it will work out

Great staffing. Terrible food. Please do cold sandwiches or salads. the "hot pickets" are terrible.

Not so good. The takeoff was aborted after reaching 100 knots due to a problem with the front tires. I do commend the pilot for a quick decision and preventing a potential disaster. We returned to the gate to put fresh tires on the front. Our flight was delayed for over 3 hours. The rest of the flight was okay. We were reimbursed by Hawaiian Airlines for only $50. Not too generous

Arrived at the gate with no seats assigned. Was told by gate agent the flight was full and we would not be on it. I asked the gate agent how could I be sold tickets when the flight was full. She replied, “Thats just how they do it.” I was able to get seats once I arrived at the gate. The flight itself was great. I’ll never purchase tickets without seat assignments from kayak or anyone again. Shame on kayak or Hawaiian airlines or all of you.

The pre-flight check in process was bad. The app didn't allow check-in online and forced me to check in at the airport. Alaska didn't have self-service kiosks for check in (only bag tagging stations), so I had to wait in line with people who were checking bags just to get my boarding pass.

The flight is supposed to be Hawaiian, but it's operated by Alaska. As such, I could not find my reservation on Hawaiian nor Alaska website. I could not check in on line. At the airports, even the kiosk could not find my reservation. I needed to wait in a long line to check in even though I have no bag to check. Good thing I got to the airport early enough.

The temperature on the plane was too cold and the food was not very good. Everything else was good.

Every customer service agent we came in contact with was rude, tired, overworked and indifferent

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….

The worst flight of my life. Never will I fly frontier again

Frontier had yet another flight cancellation. Have never made a complete round trip with this airline without at least one leg getting cancelled. Miserable flights - dirty, uncomfortable planes that apparently always have issues since I've had multiple delays and cancellations with them.

Flight was delayed 3 times, would have been nice to have received text message instead of email notifications. Frontier app wasn’t even updated accordingly, no gate number disclosed. No agent at front desk of gate to inform of delay. Very confused and left if the dark

They changed the timing , first delayed by 4 hours then went back to 40 mins late, we had to run back to airport to not miss our flight. This is ridiculous

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

I loked walking out on the tarmac to board and no first class. I didn't like that they have no snacks or onboard wifi to bide your time.

It was a redeye flight, so every passenger just wanted to sleep, but through the entire flight, the flight crew made announcements over the loudspeaker at maximum volume every few minutes making sleep impossible. For example: it’s 2am, and the crew decides to give an extremely detailed announcement about snacks and beverages for sale. And 3am is the perfect time to wake up everyone with a lengthy announcement about how to get a coffee refill and how to take advantage of new offer from frontier for a credit card.

The takeoff was the smoothest I've ever experienced on any airline and this is the first time I've flown on frontier so this was an extremely pleasant surprise!

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

Information on your arrival and departure airports

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