$86 Find Cheap Flights from Ontario to Oregon - Compare and Save

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 Oregon departing on 8/12. 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

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

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Portland
Portland1 stop$238
Eugene
Eugene1 stop$287
Redmond
Redmond1 stop$259
Medford
Medford1 stop$337
North Bend
North Bend1 stop$404
Boise
Boisenonstop$177
Portland
Portland1 stop$238
Eugene
Eugene1 stop$287
Redmond
Redmond1 stop$259
Medford
Medford1 stop$337
North Bend
North Bend1 stop$404
Boise
Boisenonstop$177

Book Cheap Ontario to Oregon Plane Tickets

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

Tue, Sep 15 - Sat, Sep 19
Alaska Airlines Logo
4:50 pm - 7:45 pm
ONT
-
BOI
1h 55mnonstop
Alaska Airlines Logo
3:02 pm - 4:10 pm
BOI
-
ONT
2h 08mnonstop
$177Alaska Airlines
Wed, Nov 11 - Tue, Nov 17
Alaska Airlines Logo
5:12 pm - 8:12 pm
ONT
-
BOI
2h 00mnonstop
Alaska Airlines Logo
4:48 pm - 5:51 pm
BOI
-
ONT
2h 03mnonstop
$179Alaska Airlines
Sat, Sep 12 - Sat, Sep 19
Delta Logo
1:04 pm - 6:53 pm
ONT
-
BOI
4h 49m
1 stop
Delta Logo
8:49 am - 12:14 pm
BOI
-
ONT
4h 25m
1 stop
$187Delta
Sat, Sep 12 - Fri, Sep 18
Delta Logo
1:04 pm - 6:53 pm
ONT
-
BOI
4h 49m
1 stop
Delta Logo
6:00 am - 9:02 am
BOI
-
ONT
4h 02m
1 stop
$202Delta
Tue, Aug 4 - Mon, Aug 10
Frontier Logo
6:00 am - 4:31 pm
ONT
-
PDX
10h 31m
1 stop
Frontier Logo
12:20 pm - 10:04 am
PDX
-
ONT
21h 44m
1 stop
$238Frontier
Thu, Jul 23 - Wed, Jul 29
Frontier Logo
11:52 am - 6:04 pm
ONT
-
PDX
6h 12m
1 stop
Frontier Logo
5:21 pm - 11:50 pm
PDX
-
ONT
6h 29m
1 stop
$239Frontier
Sat, Aug 8 - Tue, Aug 11
Southwest Logo
4:20 pm - 7:50 pm
ONT
-
EUG
3h 30m
1 stop
Southwest Logo
2:50 pm - 6:25 pm
EUG
-
ONT
3h 35m
1 stop
$287Southwest
Wed, Jul 22 - Sat, Jul 25
Southwest Logo
12:05 pm - 5:20 pm
ONT
-
EUG
5h 15m
1 stop
Southwest Logo
5:20 pm - 10:00 pm
EUG
-
ONT
4h 40m
1 stop
$289Southwest
Wed, Aug 5 - Sun, Aug 9
United Airlines Logo
6:00 am - 12:12 pm
ONT
-
RDM
6h 12m
1 stop
United Airlines Logo
6:00 am - 12:12 pm
RDM
-
ONT
6h 12m
1 stop
$308United Airlines
Wed, Sep 2 - Tue, Sep 8
United Airlines Logo
5:00 am - 1:25 pm
ONT
-
OTH
8h 25m
1 stop
United Airlines Logo
2:06 pm - 8:01 pm
OTH
-
ONT
5h 55m
1 stop
$404United Airlines
Booking Insights

KAYAK's insights & trends for Ontario to Oregon flights

Get data-powered insights and trends into flights from Ontario to Oregon 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 Oregon?

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 Oregon departing in August.

What is the cheapest Ontario to Oregon flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Oregon from Ontario found in the last 5 days was to Portland, at $278 round-trip. The most popular route is from Ontario (ONT) to Portland (PDX), and the cheapest round-trip airline ticket found on this route in the last 5 days was $278.

What is the cheapest time of day to fly to Oregon?

The average price for all round-trip flights from Ontario to Oregon depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Oregon is generally in the afternoon, when round-trip flights cost $179 on average. Morning departures are around 7% more expensive than evening flights, on average. The most expensive time of day to fly to Oregon is generally in the morning, which is peak travel time and where the average cost of a ticket is $290.

Can I save money by flying with a layover from Ontario to Oregon?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $331, prices are generally cheapest when you fly direct.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Oregon, 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 Oregon is October, when tickets cost $39 (return) on average. On the other hand, the most expensive months are June and March, when the average cost of round-trip tickets is $158 and $139 respectively.

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

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

For Ontario to Oregon, Friday is the cheapest day to fly on average and Thursday is the most expensive. Flying from Oregon back to Ontario, the best deals are generally found on Friday, with Wednesday being the most expensive.

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

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 Oregon, 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 Oregon, you should book around 2 weeks before departure, which saves you about 34% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$86
Best time to beat the crowds with an average 7% drop in price.
Flight from Ontario to Portland

Flights from Ontario to Oregon: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from Ontario to Oregon 
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 - booking Oregon flights

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

    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 Oregon.

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

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

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Ontario to Oregon with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Oregon?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Ontario to Oregon up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding cheap flights to Oregon

  • Looking for a cheap flight? 25% of our users found tickets from Ontario to the following destinations at these prices or less: Portland $183 one-way - $324 round-trip

Reviews of the top 5 airlines serving from Ontario to Oregon

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Oregon. 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 Oregon? 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
Alaska AirlinesOverall score based on 12603 reviews
8.5Crew
7.8Comfort
7.1Food
7.0Entertainment
8.1Boarding
Airline reviews

The first flight was fine, great crew, but the plane was delayed 45 minutes to go to Seattle because of they were missing a ramp. That would make sense if the plane was actually at the gate. Not if we’re still waiting for a plane. After we landed we waited 30-45 minutes on the tarmac just to get off the plane. Alaska made me miss my connecting flight, wasting my time, and my money. I should honestly be reimbursed, but hey, when does the airline ever actually take accountability? Never.

2.0 MediocreAnonymous, Jun 2026
ONT - SEA
Read more Alaska Airlines reviews

The first flight was fine, great crew, but the plane was delayed 45 minutes to go to Seattle because of they were missing a ramp. That would make sense if the plane was actually at the gate. Not if we’re still waiting for a plane. After we landed we waited 30-45 minutes on the tarmac just to get off the plane. Alaska made me miss my connecting flight, wasting my time, and my money. I should honestly be reimbursed, but hey, when does the airline ever actually take accountability? Never.

Wish there were more complimentary drinks available - only had water and apple juice. Also - no snacks were provided during the flight, but we were offered some items as we exited the plane.

My daughter has anxiety and became nauseous after boarding the plane and before take off. She went to the plane bathroom and ended up having to vomit, and your staff promptly removed us from the flight. We explained that it was due to my daughter’s anxiety, and that the condition would not continue in the air, but they removed us anyway. We have flown many many times before on many different airlines and my daughter’s anxiety has resulted in nausea and sickness before takeoff, and every airline has been accommodating and professional. This is was our first time flying with your airline, and also the first time we have ever been removed from a flight. This was the worst service we have ever experienced. This was a special surprise trip we gifted to my daughter for graduating college. I had also paid to upgrade the family to first class and sit all together which we had never done before and can’t afford on a normal basis. Our removal from the flight was not only extremely embarrassing, but devastating for my daughter. My daughter and I were removed from the plane and a call was made by your staff to medical personnel, a few questions were asked of my daughter, and then she was magically cleared. All of this took mere minutes. Why this could not have been performed while we were on the plane, or why this could not have been performed off the plane and then us allowed to reboard is beyond me. My wife and youngest daughter continued on the original flight alone and were very upset and crying due to the situation, yet the staff did nothing to console or assist them. My wife states that upon arrival in Portland and as they were exiting the plane, one of the stewardesses involved said “byyyyeeeee” to them sarcastically and laughed. Myself and my oldest daughter had to wait 4 hours for an alternate flight and were sat in regular seats because our first class seat purchase could not be honored. My wife wasn’t allowed to pick up our rental car and had to wait 4 hours with our luggage until I arrived. The delay prevented us from being able to carry out planned events and ruined the first day of our trip. Upon explaining all of this to your customer service, we received no sympathy, assistance, or compensation other than your staff submitting a request for a reimbursement of my and my daughters first class upgrade cost. When checking in early for our flight back home, the luggage cost for myself and my eldest daughter was no longer discounted as it was for my wife and youngest daughter. Customer service once again could not assist me over the phone and rectify what should have been a minor adjustment. Instead they stated I would have to wait until we physically checked bags in at the airport and then ask staff to adjust the luggage cost. With everything else we had experienced, I was not going to leave that to chance and instead paid full price for the luggage ahead of time. Or experience with Alaska Airlines was a complete disaster and I am baffled at the lack of empathy and assistance from your staff. I’m not sure of what else to say other than the fact that unless we are compensated by Alaska Airlines in some form to offset the horrendous service we received, we will be relaying our experience to family and friends and on social media, and doing all we can to urge everyone to avoid utilizing your services.

I got an email 3 hours before the flight letting me know it got canceled

Boarding was easy and quick. Staff was very friendly. Service of snacks and drinks by staff was outstanding.

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.

The first leg of the trip was excellent. Lovely flight attendants and comfortable plane. The second leg left a lot to be desired. The flight attendant was rude when I asked for a Diet Coke, the boarding required quite a long walk and the plane was crammed and uncomfortable.

You no longer give receipts for baggage at the counter. And it is next to impossible to get it on your webpage. Spent 20 min trying and gave up... I need receipt to submit for reimbursement and don't have time to waste on your poor webpage Disappointing .....

I think that the plane needed a little TLC. It was not as clean as I was expecting. There were a lot of food crumbs all over the floor in the exit aisle and also on my seat. I was also asked to pour out my drink instead of getting to finish it, which I thought was very strange. I had a full cup of hot coffee that I poured in a plastic bag held by the stewardess. I think this is so the cleaning crew does not have to clean up much trash? I still would have liked to finish the cup of coffee.

Alaska Airlines is always my first choice for airlines. This flight in particular was great because we were all boarded quickly, the staff was friendly, and we arrived at our destination early.

I think Southwest is the number one airline that anyone can fly I have flown for the first time Frontier and what a joke and their customer service United was a very strange experience I'm only sticking to Southwest from here on out for sure

Great job Southwest! My family doesn't fly often but we felt safe the whole time.

Flight was delayed, full flight and I had to change gates. Southwest flights are always late later in the day.

Was fine, delayed and feels like southwest is always late

The entire experience from boarding to landing was amazing! The crew were very friendly. Will definitely be back.

It was as expected and I was grateful for the wheel chair help and ease of use.

Tight seats. Be prepared to sit in the middle if you are in boarding group C.

This was a connecting flight for me and I had already traveled for 7 hours. First, the Pilot didn’t show up and then the gate changed twice, after which the flight was rescheduled for 2 hours later. This made me late and I had to make other transportation arrangements to get home to Astoria another 1 hour & 45 minutes away. This cost me $250 more than it should have. Will not fly southwest again.

Long layover in Chicago. Wish that could have been lessened.

I liked receiving attention from aged and well experienced flight attendants. I disliked the non-gluten-free snack but I brought my own so I was OK.

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.

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.

Good and friendly staff. Nicely enjoyed the complimentary drink and snack.

All was good and they were able to seat my travel companion next to me. Thank you.

Despite two calls as well as a chat on the website, Alaska would not add my TSA number to my reservation. The flight was switched from Hawaiian to Alaska which caused them to mess this up in the first place

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.

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 seating was very cramped. The selection of movies was poor.

They did not let me check in . Said I was 4 mins late.

I noticed the flight attendants had a bit of attitude towards guests. Not sure why but they were a little moody. They tossed earphones at me and to pass to the person next to me. I think the same flight attendant kinda got upset at a man for putting his cup in the trash area on the cart (I think he was trying to help but perhaps placed it in a diff waste area). The flight attendant was not happy and snapped a little

Seat pitch is horrible especially on the 15 hour flight. Gate crew at SFO was Outstanding. The flight crew was also great.

Had a one hour delay due to mechanical issue. I didn’t think I’d be able to make my connecting flight, but they waited for me and greeted me when I arrived to help things run smooth.

Staff were good. My seat was in need of repair, but for a short flight was not problematic. Usual basic snack and drink setup that you'll find on any US carrier. Over, a decent, basic flight.

I will never book a flight through Cheap fare. They booked me from Portland Main . And would not give me a refund, so I bought 2 tickets one for 299. From Portland Main to ORD. Then I had to buy a ticket from Oregon PDX to ORD that was another 440. So Just so you know they even told me it was there fault but no refund. Bad bussniess. I did inform United but they said they couldn't help me due to the fact I booked through Cheap Tickets. Never again. And I'm spreding the word. I let everyone know at my 50th class reunion

Pilot Erika DeLong made us feel safe and at ease in a frankly scary time to be flying. Her warm smile and greeting and excellent command of the aircraft in foggy bumpy weather helped us all to calm our nerves and get us home safely.

Not enough room between rows and food was gross. $160 baggage charge?! Never again.

East Lounge in Denver was terrible. Turning away active military on orders? Really? Sad.

Clean and plenty of room for handbaggage. Leg room was cramped compared with the 777 from Frankfurt.

Pretty turbulent, but not anyone’s fault. They got us there. Impressed that they carried on with a drink service.

Delays!!! Maintain your planes so your customers don’t have to sit on their assess for over an hour on the tarmac!! Also, United app is buggy. Videos did not load. Overall a miserable experience. Flight crew was awesome though.

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.

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!

A lady asked to stop the flight after the tunnel pulled away and we began to depart a flight that was already hours late. The attendance respectfully stopped the the plane and had the tunnel return. After the tunnel returned the passenger claimed to have changed her mind . The tunnel was then put in reverse and the passenger remained on the plane .. They should have sent the sick passenger off the plane like initially replaced. They existed a couple off the plane prior to that situation.. So.. all and all.. it was a long and flight.. .

We understand and comply with Frontier’s bag sizes. We’ve had some problems in past while having to await other passengers who do not understand the baggage restrictions or have not prepaid and that is usually our biggest concern (others delaying us) with flying Frontier. Flying OUT of ONT, however, has always been a great experience. I’ve also noted even on delayed Frontier flights very knowledgeable pilots who manage expectations well.

Long lines, rude staff, everything that's offered you have to pay for.

The last time I flew Frontier was in the 1960s when it was a “real” airline. We flew this time because of the price & schedule. As the saying goes, you get what you pay for.

I appreciated the upgrade to free cary-on bag and seat selection at no charge

Flight was delayed on the runway for 40 minutes the crew did not even offer even water to passengers to compensate for the flight delayed. The flight was delayed due to aircraft mechanical issues. Worst customer service ever

This isna terribly run airlines. If you're one minute late, they will deny your ticket. Don't waste your time or money

Flight was delayed for more than 3 hours, crew at ONT airport was rude, and when we got to DFW the airplane had an issue landing, we had to be taxied to the terminal, and the luggage was hold until the next day.

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

Information on your arrival and departure airports