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Cheap flights from Ontario to Portland from $60

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 3/7. 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
7:00 am - 9:28 am
ONT
-
PDX
2h 28mnonstop
Alaska Airlines Logo
9:30 pm - 11:52 pm
PDX
-
ONT
2h 22mnonstop
$157Alaska Airlines
Tue, Mar 3 - Mon, Mar 9
Frontier Logo
12:59 am - 1:02 pm
ONT
-
PDX
12h 03m
1 stop
Frontier Logo
12:27 pm - 11:55 pm
PDX
-
ONT
11h 28m
1 stop
$160Frontier
Mon, Apr 20 - Sat, Apr 25
Hawaiian Airlines Logo
4:02 pm - 10:41 pm
ONT
-
PDX
6h 39m
1 stop
Hawaiian Airlines Logo
3:52 pm - 11:32 pm
PDX
-
ONT
7h 40m
1 stop
$161Hawaiian Airlines
Sat, Mar 7 - Mon, Mar 9
United Airlines Logo
6:15 am - 12:33 pm
ONT
-
PDX
6h 18m
1 stop
United Airlines Logo
1:39 pm - 5:38 pm
PDX
-
ONT
3h 59m
1 stop
$162United Airlines
Thu, Mar 12 - Sat, Mar 14
Frontier Logo
3:24 pm - 6:43 pm
ONT
-
PDX
27h 19m
1 stop
Frontier Logo
10:18 pm - 1:52 pm
PDX
-
ONT
15h 34m
1 stop
$165Frontier
Thu, Feb 19 - Mon, Feb 23
Southwest Logo
6:35 am - 10:25 am
ONT
-
PDX
3h 50m
1 stop
Southwest Logo
7:45 pm - 11:40 pm
PDX
-
ONT
3h 55m
1 stop
$167Southwest
Thu, Mar 5 - Sun, Mar 8
Southwest Logo
6:10 pm - 12:55 am
ONT
-
PDX
6h 45m
2 stops
Southwest Logo
6:25 am - 11:05 am
PDX
-
ONT
4h 40m
1 stop
$172Southwest
Sat, Apr 4 - Sat, Apr 11
Alaska Airlines Logo
7:00 am - 9:28 am
ONT
-
PDX
2h 28mnonstop
Alaska Airlines Logo
5:58 pm - 8:23 pm
PDX
-
ONT
2h 25mnonstop
$177Alaska Airlines
Sat, Mar 21 - Sat, Mar 28
Multiple Airlines Logo
7:00 am - 9:24 am
ONT
-
PDX
2h 24mnonstop
Multiple Airlines Logo
12:52 pm - 8:04 pm
PDX
-
ONT
7h 12m
1 stop
$179Multiple Airlines
Sat, May 9 - Mon, May 11
Multiple Airlines Logo
7:00 am - 9:28 am
ONT
-
PDX
2h 28mnonstop
Multiple Airlines Logo
1:48 pm - 7:31 am
PDX
-
ONT
17h 43m
1 stop
$184Multiple Airlines
Fri, Apr 17 - Wed, Apr 22

Delta flights from Ontario to Portland

Our best Delta deals on Ontario to Portland flight tickets
Delta
Feb 27
ONT5:00 pmOntario
6h 53m
1 stop
PDX11:53 pmPortland
Mar 1
PDX7:11 pmPortland
4h 38m
1 stop
ONT11:49 pmOntario
$212
Delta
Feb 24
ONT6:00 amOntario
6h 25m
1 stop
PDX12:25 pmPortland
Feb 24
PDX7:11 pmPortland
4h 38m
1 stop
ONT11:49 pmOntario
$213
Delta
Jul 8
ONT2:00 pmOntario
6h 49m
1 stop
PDX8:49 pmPortland
Jul 15
PDX7:14 pmPortland
4h 30m
1 stop
ONT11:44 pmOntario
$238

Alaska Airlines flights from Ontario to Portland

Our best Alaska Airlines deals on Ontario to Portland flight tickets
Alaska Airlines
Mar 3
ONT7:00 amOntario
2h 28m
PDX9:28 amPortland
Mar 9
PDX2:50 pmPortland
2h 24m
ONT5:14 pmOntario
$157
Alaska Airlines
Mar 21
ONT7:00 amOntario
2h 28m
PDX9:28 amPortland
Mar 28
PDX5:58 pmPortland
2h 25m
ONT8:23 pmOntario
$177
Alaska Airlines
Mar 3
ONT6:14 amOntario
4h 32m
1 stop
PDX10:46 amPortland
Mar 9
PDX2:50 pmPortland
2h 24m
ONT5:14 pmOntario
$187

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 February 3, 2026.
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 3/3

7:00 am-9:28 am

Nonstop2h 28m

Portland

Mon 3/9

9:30 pm-11:52 pm

Nonstop2h 22m

$157

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Mon 4/20

12:59 am-1:02 pm

1 stop12h 03m

Portland

Sat 4/25

12:27 pm-11:55 pm

1 stop11h 28m

$160

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 3/7

4:02 pm-10:41 pm

1 stop6h 39m

Portland

Mon 3/9

3:52 pm-11:32 pm

1 stop7h 40m

$161

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Thu 3/12

6:15 am-12:33 pm

1 stop6h 18m

Portland

Sat 3/14

1:39 pm-5:38 pm

1 stop3h 59m

$162

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Thu 2/19

3:24 pm-6:43 pm

1 stop27h 19m

Portland

Mon 2/23

10:18 pm-1:52 pm

1 stop15h 34m

$165

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Thu 3/5

6:35 am-10:25 am

1 stop3h 50m

Portland

Sun 3/8

7:45 pm-11:40 pm

1 stop3h 55m

$167

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 4/4

6:10 pm-12:55 am

2 stops6h 45m

Portland

Sat 4/11

6:25 am-11:05 am

1 stop4h 40m

$172

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 3/21

7:00 am-9:28 am

Nonstop2h 28m

Portland

Sat 3/28

5:58 pm-8:23 pm

Nonstop2h 25m

$177

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 5/9

7:00 am-9:24 am

Nonstop2h 24m

Portland

Mon 5/11

12:52 pm-8:04 pm

1 stop7h 12m

$179

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Fri 4/17

7:00 am-9:28 am

Nonstop2h 28m

Portland

Wed 4/22

1:48 pm-7:31 am

1 stop17h 43m

$184

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 October. Flight prices, which tend to average around $182, are often lower during this time because this is during the off-season. If you don’t want to visit Portland in October, then you should wait until July to fly from Ontario, when ticket prices are also cheap, with an average price of $183.

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 $204. 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 in the afternoon when flights can be purchased for as low as $212. At noon 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 weeks ahead of your departure date. In general, you can expect to find flights to Portland for around $219 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 $173 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 February 2026, prices for Ontario to Portland flights are approximately 50% 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

$163

Fastest flight time

2h 17m

Direct flights

Every day

Airports in Portland

1 airport
The best one-way flight to Portland from Ontario in the past 72 hours is $163. The best round-trip flight deal from Ontario to Portland found on momondo in the last 72 hours is $181.
The fastest flight from Ontario to Portland takes 2h 17m
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 17m.

  • 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 $75Free CancellationRating
5.7
3,052 reviews
Search Frontier flights
DeltaPriceFrom $78Free CancellationRating
7.9
8,135 reviews
Search Delta flights
Hawaiian AirlinesPriceFrom $88Free CancellationRating
7.8
2,830 reviews
Search Hawaiian Airlines flights
Alaska AirlinesPriceFrom $157Free CancellationRating
8.0
11,831 reviews
Search Alaska Airlines flights
SouthwestPriceFrom $166Free CancellationRating
8.0
4,273 reviews
Search Southwest flights
United AirlinesPriceFrom $191Free CancellationRating
7.4
9,232 reviews
Search United 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 $276, but momondo users have found Alaska Airlines deals from Ontario to Portland from as low as $157 round-trip. Alaska Airlines has been scored 8.0/10 in 11,831 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 $215. Hawaiian Airlines operates 21 flights to Portland from Ontario in an average week. Users have rated it 7.8/10 across 2,830 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
Tigard
Longview
McMinnville
Gresham
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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