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Cheap flights from Ontario to Portland from $44

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Portland departing on 5/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Ontario to Portland

Cheap round-trip flights

These are some of the best round-trip flight deals from Ontario to Portland that have been recently found on momondo from popular airlines, departing in the coming months.
11:28 am - 1:54 pmONT-PDX
2h 26mnonstop
2:54 pm - 5:15 pmPDX-ONT
2h 21mnonstop
$136Frontier
Find Deal
Thu, May 29 - Sun, Jun 1
11:28 am - 1:54 pmONT-PDX
2h 26mnonstop
2:54 pm - 5:15 pmPDX-ONT
2h 21mnonstop
$147Frontier
Find Deal
Fri, May 30 - Sun, Jun 1
7:00 am - 9:24 amONT-PDX
2h 24mnonstop
7:05 am - 9:28 amPDX-ONT
2h 23mnonstop
$177Alaska Airlines
Find Deal
Tue, Mar 25 - Wed, Apr 2
6:55 am - 9:19 amONT-PDX
2h 24mnonstop
9:41 pm - 11:59 pmPDX-ONT
2h 18mnonstop
$187Alaska Airlines
Find Deal
Wed, Apr 2 - Thu, Apr 3
10:20 am - 3:40 pmONT-PDX
5h 20m1 stop
1:40 pm - 10:35 pmPDX-ONT
8h 55m2 stops
$202Southwest
Find Deal
Wed, Mar 5 - Wed, Mar 12
2:50 pm - 10:50 pmONT-PDX
8h 00m1 stop
6:05 pm - 12:10 amPDX-ONT
6h 05m1 stop
$212Southwest
Find Deal
Tue, Apr 1 - Sat, Apr 5
1:30 pm - 6:06 pmONT-PDX
4h 36m1 stop
5:26 pm - 11:56 pmPDX-ONT
6h 30m1 stop
$217Delta
Find Deal
Thu, Mar 13 - Mon, Mar 17
6:00 am - 12:27 pmONT-PDX
6h 27m1 stop
1:35 pm - 5:39 pmPDX-ONT
4h 04m1 stop
$232United Airlines
Find Deal
Sun, Jun 15 - Tue, Jun 17
1:30 pm - 6:12 pmONT-PDX
4h 42m1 stop
7:10 am - 1:13 pmPDX-ONT
6h 03m1 stop
$237Delta
Find Deal
Thu, May 29 - Mon, Jun 2
6:00 am - 12:32 pmONT-PDX
6h 32m1 stop
6:00 am - 9:54 amPDX-ONT
3h 54m1 stop
$247United Airlines
Find Deal
Tue, Mar 4 - Tue, Mar 11

Frontier flights from Ontario to Portland

Our best Frontier deals on Ontario to Portland flight tickets
Frontier
May 29
ONT11:28 amOntario
2h 26m
PDX1:54 pmPortland
Jun 1
PDX2:54 pmPortland
2h 21m
ONT5:15 pmOntario
Frontier
May 30
ONT11:28 amOntario
2h 26m
PDX1:54 pmPortland
Jun 1
PDX2:54 pmPortland
2h 21m
ONT5:15 pmOntario
Frontier
Jun 12
ONT11:28 amOntario
2h 26m
PDX1:54 pmPortland
Jun 16
PDX2:54 pmPortland
2h 21m
ONT5:15 pmOntario

Alaska Airlines flights from Ontario to Portland

Our best Alaska Airlines deals on Ontario to Portland flight tickets
Alaska Airlines
Mar 25
ONT7:00 amOntario
2h 24m
PDX9:24 amPortland
Apr 2
PDX7:05 amPortland
2h 23m
ONT9:28 amOntario
Alaska Airlines
Apr 2
ONT6:55 amOntario
2h 24m
PDX9:19 amPortland
Apr 3
PDX9:41 pmPortland
2h 18m
ONT11:59 pmOntario
Alaska Airlines
Mar 14
ONT7:00 amOntario
2h 26m
PDX9:26 amPortland
Mar 17
PDX9:44 pmPortland
2h 14m
ONT11:58 pmOntario

See travel insights to Portland from

How to get the cheapest flight ticket from Ontario to Portland

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Portland?

The cheapest month to fly to Portland from Ontario is in April. Flight prices, which tend to average around $127, are often lower during this time because this is during the off-season. If you don’t want to visit Portland in April, then you should wait until June to fly from Ontario, when ticket prices are also cheap, with an average price of $153.

What is the cheapest day to depart on your flight to Portland?

The cheapest day to depart on your flight to Portland is on a Tuesday when prices can be found for as low as $214. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Portland is Sunday, with ticket prices averaging around $249.

What is the cheapest time of day to depart on your flight to Portland?

The cheapest time of day to fly to Portland is at noon when flights can be purchased for as low as $203. In the evening is when there is more demand to fly to Portland, so prices are often more expensive at around $248 per ticket.

What is the cheapest Ontario to Portland flight route?

Fly from Ontario to Portland for the best Ontario - Portland flight prices

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

You are more likely to see cheaper flights to Portland from Ontario when booking 4 weeks ahead of your departure date. In general, you can expect to find flights to Portland for around $179 when searching 4 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portland from Ontario for as low as $121 on momondo.

What cabin class options are available on Ontario to Portland flights?

There are 4 cabin classes available to choose from on Ontario to Portland flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Ontario to Portland flight prices changed over time?

As of February 2025, prices for Ontario to Portland flights are approximately 66% cheaper when compared to flights at the same time last year.

When to book flights from Ontario to Portland

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Portland according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Portland (ONT to PDX) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Portland

Best Price Found

$44

Fastest flight time

2h 20m

Direct flights

Every day

Airports in Portland

1 airport
The best one-way flight to Portland from Ontario in the past 72 hours is $44. The best round-trip flight deal from Ontario to Portland found on momondo in the last 72 hours is $136.
The fastest flight from Ontario to Portland takes 2h 20m
Direct flights go from Ontario to Portland every day.
There is 1 airport near Portland: Portland (PDX)

  • How far is Ontario to Portland by plane?

    Ontario and Portland are 834.5 mi apart from one another. A reasonable flight in good conditions will take 2h 20m.

  • When did momondo last update prices for flights from Ontario Airport to Portland Airport?

    Prices for flights from Ontario Airport to Portland Airport are updated daily.

  • How many operators does momondo search for flights from Ontario Airport to Portland Airport?

  • How old do you have to be to fly from Ontario Airport to Portland Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Portland Airport.

  • What documentation or ID do you need to fly to Portland Airport?

    The required travel and health documents for your Portland Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Portland Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Ontario to Portland?

  • What is the most popular airline from Ontario to Portland?


Best airlines flying from Ontario to Portland

Compare and see reviews for airlines that fly from Ontario to Portland with momondo
Airline
Rating
Free Cancellation
Price
Spirit AirlinesPriceFrom $48Free CancellationRating
6.3
8,062 reviews
Search Spirit Airlines flights
FrontierPriceFrom $55Free CancellationRating
6.0
3,396 reviews
Search Frontier flights
Alaska AirlinesPriceFrom $152Free CancellationRating
8.0
9,691 reviews
Search Alaska Airlines flights
SouthwestPriceFrom $158Free CancellationRating
8.1
4,496 reviews
Search Southwest flights
DeltaPriceFrom $167Free CancellationRating
8.0
8,336 reviews
Search Delta flights
United AirlinesPriceFrom $177Free CancellationRating
7.4
8,845 reviews
Search United Airlines flights
  • Alaska Airlines Flights From Ontario to Portland

    Alaska Airlines operates around 4 flights from Ontario to Portland every week. The average price of these flights found in the last 72 hours has been $265, but momondo users have found Alaska Airlines deals from Ontario to Portland from as low as $152 round-trip. Alaska Airlines has been scored 8.0/10 in 9,696 reviews.


Traveling to a place near Portland?

Book flights to Portland if you plan to visit one of these locations
Lincoln City
Cannon Beach
Seaside
Salem
Vancouver
Astoria
Long Beach
Depoe Bay
Beaverton
Hillsboro
Hood River
Rockaway Beach
Gresham
Tigard
Longview
McMinnville
Clackamas
Pacific City
Troutdale
Tillamook

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Portland?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Ontario to Portland. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Ontario to Portland with flexible booking policies on momondo?

Yes. All flights to Portland from Ontario on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Ontario to Portland?

Once you have performed a search for Ontario to Portland flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Ontario to Portland right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Ontario to Portland now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Portland and let you know when they change.


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