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Cheap flights from Ontario to Portland from $74

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 1/27. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Ontario to Portland

Cheap round-trip flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
5:59 pm - 8:26 pm
ONT
-
PDX
2h 27mnonstop
Alaska Airlines Logo
2:43 pm - 5:03 pm
PDX
-
ONT
2h 20mnonstop
$167Alaska Airlines
Tue, Jan 20 - Wed, Feb 4
Hawaiian Airlines Logo
5:59 pm - 8:26 pm
ONT
-
PDX
2h 27mnonstop
Hawaiian Airlines Logo
5:50 pm - 8:10 pm
PDX
-
ONT
2h 20mnonstop
$168Hawaiian Airlines
Fri, Jan 23 - Mon, Jan 26
Hawaiian Airlines Logo
7:00 am - 9:33 am
ONT
-
PDX
2h 33mnonstop
Hawaiian Airlines Logo
5:50 pm - 8:10 pm
PDX
-
ONT
2h 20mnonstop
$170Hawaiian Airlines
Fri, Jan 23 - Mon, Jan 26
Alaska Airlines Logo
1:46 pm - 4:20 pm
ONT
-
PDX
2h 34mnonstop
Alaska Airlines Logo
5:50 pm - 8:10 pm
PDX
-
ONT
2h 20mnonstop
$172Alaska Airlines
Sat, Jan 24 - Sat, Jan 24
Delta Logo
5:10 pm - 11:55 pm
ONT
-
PDX
6h 45m1 stop
Delta Logo
7:10 am - 1:56 pm
PDX
-
ONT
6h 46m1 stop
$174Delta
Thu, Jan 22 - Wed, Feb 4
Delta Logo
7:30 am - 12:44 pm
ONT
-
PDX
5h 14m1 stop
Delta Logo
5:15 pm - 10:51 pm
PDX
-
ONT
5h 36m1 stop
$175Delta
Tue, Jan 27 - Thu, Jan 29
Alaska Airlines Logo
5:59 pm - 8:26 pm
ONT
-
PDX
2h 27mnonstop
Alaska Airlines Logo
5:50 pm - 8:10 pm
PDX
-
ONT
2h 20mnonstop
$176Alaska Airlines
Fri, Jan 23 - Mon, Jan 26
Alaska Airlines Logo
7:00 am - 9:33 am
ONT
-
PDX
2h 33mnonstop
Alaska Airlines Logo
5:50 pm - 8:10 pm
PDX
-
ONT
2h 20mnonstop
$177Alaska Airlines
Fri, Jan 23 - Fri, Jan 30
Hawaiian Airlines Logo
7:00 am - 9:33 am
ONT
-
PDX
2h 33mnonstop
Hawaiian Airlines Logo
9:30 pm - 3:08 pm
PDX
-
ONT
17h 38m1 stop
$180Hawaiian Airlines
Mon, Jan 26 - Mon, Feb 2
Delta Logo
7:30 am - 10:07 am
ONT
-
PDX
26h 37m1 stop
Delta Logo
9:20 am - 1:56 pm
PDX
-
ONT
4h 36m1 stop
$182Delta
Sun, Jan 18 - Tue, Feb 3

Hawaiian Airlines flights from Ontario to Portland

Our best Hawaiian Airlines deals on Ontario to Portland flight tickets
Hawaiian Airlines
Jan 23
ONT5:59 pmOntario
2h 27m
PDX8:26 pmPortland
Jan 26
PDX5:50 pmPortland
2h 20m
ONT8:10 pmOntario
$168
Find similar
Hawaiian Airlines
Jan 23
ONT7:00 amOntario
2h 33m
PDX9:33 amPortland
Jan 26
PDX5:50 pmPortland
2h 20m
ONT8:10 pmOntario
$170
Find similar
Hawaiian Airlines
Jan 26
ONT7:00 amOntario
2h 33m
PDX9:33 amPortland
Feb 2
PDX9:30 pmPortland
17h 38m
1 stop
ONT3:08 pmOntario
$180
Find similar

Delta flights from Ontario to Portland

Our best Delta deals on Ontario to Portland flight tickets
Delta
Jan 22
ONT5:10 pmOntario
6h 45m
1 stop
PDX11:55 pmPortland
Feb 4
PDX7:10 amPortland
6h 46m
1 stop
ONT1:56 pmOntario
$174
Find similar
Delta
Jan 27
ONT7:30 amOntario
5h 14m
1 stop
PDX12:44 pmPortland
Jan 29
PDX5:15 pmPortland
5h 36m
1 stop
ONT10:51 pmOntario
$175
Find similar
Delta
Jan 18
ONT7:30 amOntario
26h 37m
1 stop
PDX10:07 amPortland
Feb 3
PDX9:20 amPortland
4h 36m
1 stop
ONT1:56 pmOntario
$182
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Portland that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated December 30, 2025.
Use the filters below to find and compare flights from Ontario to Portland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Tue 1/20

5:59 pm-8:26 pm

Nonstop2h 27m

Portland

Wed 2/4

2:43 pm-5:03 pm

Nonstop2h 20m

$167

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Fri 1/23

5:59 pm-8:26 pm

Nonstop2h 27m

Portland

Mon 1/26

5:50 pm-8:10 pm

Nonstop2h 20m

$168

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Fri 1/23

7:00 am-9:33 am

Nonstop2h 33m

Portland

Mon 1/26

5:50 pm-8:10 pm

Nonstop2h 20m

$170

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 1/24

1:46 pm-4:20 pm

Nonstop2h 34m

Portland

Sat 1/24

5:50 pm-8:10 pm

Nonstop2h 20m

$172

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Thu 1/22

5:10 pm-11:55 pm

1 stop6h 45m

Portland

Wed 2/4

7:10 am-1:56 pm

1 stop6h 46m

$174

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Tue 1/27

7:30 am-12:44 pm

1 stop5h 14m

Portland

Thu 1/29

5:15 pm-10:51 pm

1 stop5h 36m

$175

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Fri 1/23

5:59 pm-8:26 pm

Nonstop2h 27m

Portland

Mon 1/26

5:50 pm-8:10 pm

Nonstop2h 20m

$176

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Fri 1/23

7:00 am-9:33 am

Nonstop2h 33m

Portland

Fri 1/30

5:50 pm-8:10 pm

Nonstop2h 20m

$177

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Mon 1/26

7:00 am-9:33 am

Nonstop2h 33m

Portland

Mon 2/2

9:30 pm-3:08 pm

1 stop17h 38m

$180

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sun 1/18

7:30 am-10:07 am

1 stop26h 37m

Portland

Tue 2/3

9:20 am-1:56 pm

1 stop4h 36m

$182

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 January. Flight prices, which tend to average around $177, are often lower during this time because this is during the off-season. If you don’t want to visit Portland in January, then you should wait until July to fly from Ontario, when ticket prices are also cheap, with an average price of $182.

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 Saturday when prices can be found for as low as $206. 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 Wednesday, with ticket prices averaging around $242.

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

The cheapest time of day to fly to Portland is in the afternoon when flights can be purchased for as low as $204. In the evening is when there is more demand to fly to Portland, so prices are often more expensive at around $241 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 weeks ahead of your departure date. In general, you can expect to find flights to Portland for around $218 when searching 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 $180 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.

Can stopping save me money on Ontario to Portland flights?

No. A direct flight is the cheapest option for a flight between Ontario to Portland.

How have Ontario to Portland flight prices changed over time?

As of December 2025, prices for Ontario to Portland flights are approximately 15% more expensive 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

$218

Fastest flight time

2h 24m

Direct flights

Every day

Airports in Portland

1 airport
The best one-way flight to Portland from Ontario in the past 72 hours is $218. The best round-trip flight deal from Ontario to Portland found on momondo in the last 72 hours is $195.
The fastest flight from Ontario to Portland takes 2h 24m
Direct flights go from Ontario to Portland every day.
There is 1 airport in Portland. From Ontario there are direct flights to Portland (PDX).
Search flight deals

  • 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 24m.

  • 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
FrontierPriceFrom $78Free CancellationRating
5.7
3,067 reviews
Search Frontier flights
Hawaiian AirlinesPriceFrom $88Free CancellationRating
7.8
2,821 reviews
Search Hawaiian Airlines flights
DeltaPriceFrom $142Free CancellationRating
7.9
8,016 reviews
Search Delta flights
SouthwestPriceFrom $158Free CancellationRating
8.0
4,251 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $166Free CancellationRating
8.0
11,574 reviews
Search Alaska Airlines flights

  • Alaska Airlines Flights From Ontario to Portland

    Alaska Airlines operates around 10 flights from Ontario to Portland every week. The average price of these flights found in the last 72 hours has been $272, but momondo users have found Alaska Airlines deals from Ontario to Portland from as low as $166 round-trip. Alaska Airlines has been scored 8.0/10 in 11,574 reviews.

  • Hawaiian Airlines Flights From Ontario to Portland

    Hawaiian Airlines is also a popular choice for this route. Hawaiian Airlines flight deals for Ontario to Portland start from as low as $88 round-trip, depending on your selected dates, with average Hawaiian Airlines deals seen on momondo around $247. Hawaiian Airlines operates 18 flights to Portland from Ontario in an average week. Users have rated it 7.8/10 across 2,821 reviews.

Traveling to a place near Portland?

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

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.

An easier way to manage your Portland trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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