PWM - ONT

$181 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 1/17. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Ontario

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to Ontario, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to Ontario, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 24% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$307
Southwest
Mon 2/2Mon 2/9
PWM - ONT • 2 stops
Cheapest one-way
$181
Typical prices: $297-$531
United Airlines
Sat 1/17
PWM - ONT • 2 stops
Top airlines
Southwest
Cheapest • from $307 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
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 Ontario!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Portland to Ontario (PWM-ONT)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Portland to Ontario that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Portland to Ontario

Mon, Feb 2 - Mon, Feb 9
Southwest Logo
12:45 pm - 9:45 pm
PWM
-
ONT
12h 00m2 stops
Southwest Logo
6:50 am - 10:45 pm
ONT
-
PWM
12h 55m2 stops
$307Southwest
Thu, Jan 15 - Thu, Jan 22
American Airlines Logo
6:00 am - 6:45 pm
PWM
-
ONT
15h 45m2 stops
American Airlines Logo
7:30 pm - 12:06 pm
ONT
-
PWM
13h 36m2 stops
$361American Airlines
Sat, Jan 17 - Tue, Jan 20
United Airlines Logo
8:40 am - 8:58 pm
PWM
-
ONT
15h 18m2 stops
United Airlines Logo
5:05 am - 2:39 pm
ONT
-
PWM
30h 34m2 stops
$456United Airlines
Tue, Apr 7 - Tue, Apr 14
United Airlines Logo
4:23 pm - 10:26 pm
PWM
-
ONT
9h 03m1 stop
United Airlines Logo
6:00 am - 10:58 pm
ONT
-
PWM
13h 58m2 stops
$463United Airlines
Tue, Feb 3 - Sat, Feb 7
United Airlines Logo
11:12 am - 8:58 pm
PWM
-
ONT
12h 46m2 stops
United Airlines Logo
5:05 am - 6:54 pm
ONT
-
PWM
10h 49m2 stops
$519United Airlines
Thu, May 14 - Mon, May 18
JetBlue Logo
2:18 pm - 10:09 pm
PWM
-
ONT
10h 51m1 stop
JetBlue Logo
11:25 pm - 1:23 pm
ONT
-
PWM
10h 58m1 stop
$529JetBlue
Tue, Feb 3 - Sat, Feb 7
United Airlines Logo
11:12 am - 8:58 pm
PWM
-
ONT
12h 46m2 stops
United Airlines Logo
6:00 am - 9:01 am
ONT
-
PWM
24h 01m2 stops
$536United Airlines
Thu, Jan 1 - Mon, Jan 5
United Airlines Logo
10:19 am - 9:07 pm
PWM
-
ONT
13h 48m2 stops
United Airlines Logo
6:39 pm - 9:01 am
ONT
-
PWM
11h 22m2 stops
$545United Airlines
Thu, Jan 15 - Thu, Jan 22
Delta Logo
5:30 am - 11:31 am
PWM
-
ONT
9h 01m1 stop
Delta Logo
7:30 am - 12:20 am
ONT
-
PWM
13h 50m2 stops
$569Delta
Mon, Feb 2 - Mon, Feb 9
Delta Logo
5:30 am - 11:31 am
PWM
-
ONT
9h 01m1 stop
Delta Logo
10:30 pm - 1:45 pm
ONT
-
PWM
12h 15m2 stops
$633Delta
Booking Insights

KAYAK's insights & trends for Portland to Ontario flights

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

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.

If you are looking for a flight deal from Portland to Ontario, look for departures on Saturdays and avoid leaving on a Sunday, as it's usually the priciest day. When flying back from Ontario, Thursday is the cheapest day to fly and Sunday is the most expensive.

Good to know

Cheapest flight$181
Flight from Portland to Ontario

When to book flights from Portland to Ontario

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

FAQs for booking flights from Portland to Ontario

  • What is the cheapest flight from Portland to Ontario?

    In the last 3 days, the lowest price for a flight from Portland to Ontario was $181 for a one-way ticket and $307 for a round-trip.

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

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

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

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

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

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

  • Which airline alliances offer flights from Portland to Ontario?

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

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

    The two airlines most popular with KAYAK users for flights from Portland to Ontario are Delta and American Airlines. With an average price for the route of $442 and an overall rating of 7.9, Delta is the most popular choice. American Airlines is also a great choice for the route, with an average price of $513 and an overall rating of 7.2.

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

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Portland to Ontario.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Portland is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Portland to Ontario?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ontario with an airline and back to Portland with another airline. Booking your flights between Portland and ONT can sometimes prove cheaper using this method.

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

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

Reviews of the top airlines flying from Portland to Ontario

 
See real verified KAYAK customer reviews for airlines flying from Portland to Ontario. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Portland to Ontario? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8011 reviews
7.3Food
7.9Comfort
8.5Crew
8.1Boarding
7.9Entertainment
Airline reviews

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

8.0 ExcellentJulie, Oct 2025
LAX - SFO
Read more Delta reviews

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

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

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

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

The crew was not very visible. This might be a good thing for people who wanted to sleep but seemed odd when compared to the Atlantic crossing where they are more present in the cabin. The Food (beef) was not good. Tough and tasteless. Would love to see more choices on a long flight like that.

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

The flight crew was friendly. I tried to adjust my seat online ahead of time but no option existed without additional fees. My friend asked at the gate about a seat change and was able to make it happen. That was great! The flight crew moved a very tall gentleman and his companion which allowed us to have more space which was nice. Overall, good experience. Appreciated the blanket and pillow.

I was uncomfortably cold on the plane. Other than that it was uneventful and therefore as enjoyable as a plane ride can be.

Food was surprisingly good but the WiFi was not great

My flight was extremely cold. I had a jacket and a cover was left in each seat. The cover was extremely thin and I have a disability, fibromyalgia and arthrithis and AC air is the worst. I closed my vent and my husbands vent and it still was frigid. I asked the attendant if I could get another cover and she quickly almost dismissively and totally unconcerned stating, (I quote) (one per chair) and walked off so quickly that I didn't get a chance to explain to her that I literally have adisability. I didnt want to make a seen so I set on that flight for over 5 hours in pain, joints locking up and extremely uncomfortable. When my fibromyalgia flares up my joints not only ache but they will lock up also and it takes me days to get back to my regular self even though I take medication for it. I felt like it would not have hurt anyone at all for her to just give me an extra cover because I'm sure they have all types of medical issues in people that fly every day.

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

The experience with American Airlines was good, although the Philippines Airlines flight was much better (better seats, better food, better entertainment options, overall better). Again, the MIA to LAX flight was fine, but nothing in comparison to the comfort and accommodations of the Philippines Airlines flight from LAX to MNL.

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

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

We are too tired and frustrated to comment politely at this point

The flight crew was rude. We were in first class and no one even offered water until an hour after we were in the air. Horrible experience

Great. Quick and quiet and east. The breakfast choices were a welcome surprise!

The stewardess hit me with the food kart twice on the head and didn't say I'm sorry once. The same stewardess gave me a warm Apple Juice with No ice. The Flight was delayed for Departure 6 times, starting from 2:36pm, finally taking off 7:50pm. I was late picking up my child from the sitter by 3 hours.

Did not get the seat I selected and paid for.

My flight was delayed for several hours. Sitting at gate 16 for several hours, I got a text from Kayak the gate changed to 9 before it was announced. Very bad communication at each gate from American Airlines employees. I received 10 notifications of delay from Kayak. My vacation started off horrible! I will write to American Airlines corporate office also.

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

Information on your arrival and departure airports