ONT - PWM

$174 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 4/14. 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, 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 Ontario to Portland, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$312
Typical prices: $415-$413
United Airlines
Tue 4/14Tue 4/21
ONT - PWM • 2 stops
Cheapest one-way
$174
Typical prices: $291-$493
Southwest
Tue 4/14
ONT - PWM • 2 stops
Top airlines
Cheapest • from $312 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Ontario and Portland. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $325 (round-trip)
Shortest trip • 7h 38m (one-way)
Insights
Insights
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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
Flight Deals

Cheap Flights from Ontario to Portland (ONT-PWM)

 
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

Tue, Apr 14 - Tue, Apr 21
United Airlines Logo
6:00 am - 11:28 pm
ONT
-
PWM
14h 28m
2 stops
United Airlines Logo
4:28 pm - 10:31 pm
PWM
-
ONT
9h 03m
1 stop
$312United Airlines
Tue, Apr 28 - Wed, May 6
American Airlines Logo
11:59 pm - 3:09 pm
ONT
-
PWM
12h 10m
2 stops
American Airlines Logo
7:07 am - 4:22 pm
PWM
-
ONT
12h 15m
2 stops
$345American Airlines
Tue, Apr 28 - Wed, May 6
American Airlines Logo
11:59 pm - 3:09 pm
ONT
-
PWM
12h 10m
2 stops
American Airlines Logo
7:07 am - 4:22 pm
PWM
-
ONT
12h 15m
2 stops
$351American Airlines
Sat, Apr 18 - Sat, Apr 25
Delta Logo
12:49 pm - 11:23 pm
ONT
-
PWM
7h 34m
1 stop
Delta Logo
12:46 pm - 10:43 pm
PWM
-
ONT
12h 57m
2 stops
$354Delta
Tue, Apr 14 - Tue, Apr 21
Delta Logo
12:49 pm - 11:23 pm
ONT
-
PWM
7h 34m
1 stop
Delta Logo
5:21 am - 11:36 am
PWM
-
ONT
9h 15m
1 stop
$358Delta
Sat, Apr 18 - Sat, Apr 25
American Airlines Logo
11:59 pm - 4:20 pm
ONT
-
PWM
13h 21m
2 stops
American Airlines Logo
3:40 pm - 11:46 pm
PWM
-
ONT
11h 06m
2 stops
$361American Airlines
Sat, Apr 18 - Sat, Apr 25
Delta Logo
12:49 pm - 11:23 pm
ONT
-
PWM
7h 34m
1 stop
Delta Logo
1:12 pm - 9:00 pm
PWM
-
ONT
10h 48m
1 stop
$370Delta
Sat, Apr 18 - Sat, Apr 25
Delta Logo
12:49 pm - 11:23 pm
ONT
-
PWM
7h 34m
1 stop
Delta Logo
1:12 pm - 9:00 pm
PWM
-
ONT
10h 48m
1 stop
$374Delta
Tue, Apr 28 - Wed, May 6
American Airlines Logo
11:59 pm - 3:09 pm
ONT
-
PWM
12h 10m
2 stops
American Airlines Logo
3:39 pm - 11:46 pm
PWM
-
ONT
11h 07m
2 stops
$381American Airlines
Tue, Apr 14 - Tue, Apr 21
Delta Logo
10:15 pm - 11:02 am
ONT
-
PWM
9h 47m
2 stops
Delta Logo
5:21 am - 11:36 am
PWM
-
ONT
9h 15m
1 stop
$382Delta
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, Maine?

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, Maine departing in April.

Good to know

Low seasonSeptember
Cheapest flight$174
Best time to beat the crowds with an average 19% drop in price.
Most popular time to fly and prices are also 8% 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.

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 $174 for a one-way ticket and $312 for a round-trip.

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

    No

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

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

  • Which airline alliances offer flights from Ontario to Portland?

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

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

    The two airlines most popular with KAYAK users for flights from Ontario to Portland are Southwest and Delta. With an average price for the route of $614 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $338 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 PWM 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.

Reviews of the top 4 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 4331 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

Long flight but comfortable and not freezing as I have experienced on Hawaiian flights to the islands. They gave us blankets just in case. Nice touch.

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.

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.

They delayed the flight from 9:00 to 11:55 At 11:45 they canceled the flight. I paid a premium price for the tickets with poor service

My flight was canceled a few hours before boarding. I was rebooked on Copa airlines and missed an important meeting .

OK, we were delayed and had to de plane and reboard.

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

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.

Complimentary light meal would be appreciated. But great flight crew service on all legs

Flight delayed for more than 16 hrs and no effort was spent to provide an alternate

Women boarding passengers at the gate was absolutely rude and disrespectful of passengers. The flight attendant was absolutely delightful! Smiling and connected with the passengers. So happy. The seats are cramped and uncomfortable but I guess that’s just the way it is Communication regarding flight was excellent

it was a very short flight so my expectations were low.

Very disappointing given gate agent behavior. Filed a formal complaint with United.

The flight itself was excellent but the gate attendant made me check my carryon since she said it was an inch too big. I’ve had no problems with this carryon on recent flights on Qantas, Delta, Austrian, Southwest Airlines even though the overhead bins are the same size. there were other carryons in the bins that also looked larger than mine and there was room left in the bins for more. When I picked up my carryon from baggage claim one of the wheels had broken off.

I was in last row so that is never great bc the person in front of me leaned his seat all the way back into me.

The experience at checkin for my American Airlines flight from Sacramento to LAX was very good including the assistance I received in getting my bags checked in and boarding passes printed. Was pleasantly surprised the my bags were checked through all the way to my destination at Clark International Airport in Angeles, Philippines.

Terrible planning. And even worse gate agents. Absolutely rude behavior.

Flight was scheduled at 11:26am but they keep Delaying until midnight. They waited at airport restless.

Rough flight No beverage service due to turbulence Bottom Seat cushion was non existent

Not good. One of my luggage is missing. And until now they can’t find it

My 9:50AM flight was delayed to 3:40PM "due to incoming aircraft delay". No aircraft is "delayed" that long. Found out once we did board (after several changes in times) that the aircraft had a maintenance issue and we had to wait for another aircraft. Just tell us that. The aircraft we did get was old and the seats need to be updated. I have been traveling for several weeks with AA and you should refresh your entertainment content as frequent flyers have gone through most of your new content. I have Celiac and a shellfish allergy and continue to have struggles with meals on business and first class flights. Please keep this in mind. Sorry - was a long travel day yesterday and a bit cranky this morning with my experience comments. Still an AA fan.

Delay after delay with little communication then AA lost my luggage and at airport would not assist just said scan this QR code to track your luggage and submit a claim. However QR code provided did not work so have to go back to airport

Dloght delayed by 2.5 hrs . Common theme in my last four american floghts

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

Information on your arrival and departure airports