$74 Cheap Flights from Ontario (ONT) to Portland (PDX)

View $74 flight on Sat, Jan 17, 2026Opens in a new window

Popular airlines from Los Angeles - Ontario Intl. Airport (ONT) to Portland International Airport (PDX)

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Today's featured flight deals from Los Angeles - Ontario Intl. Airport (ONT) to Portland International Airport (PDX)

Nonstop
Carry-on included
Lower price than typical

Cheap Flights from Ontario to Portland (ONT-PDX)

Prices were available within the past 7 days and start at $74 for one-way flights and $132 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, Feb 11 - Sat, Feb 21
ONT
Ontario
PDX
Portland
$132 Roundtrip, found 7 hours ago
$132
Roundtrip
found 7 hours ago
Select United flight, departing Wed, Feb 11 from Ontario to Portland, returning Sat, Feb 21, priced at $132 found 7 hours ago
United
Sat, Jan 31 - Sun, Feb 8
ONT
Ontario
PDX
Portland
$134 Roundtrip, found 11 hours ago
$134
Roundtrip
found 11 hours ago
Select United flight, departing Sat, Jan 31 from Ontario to Portland, returning Sun, Feb 8, priced at $134 found 11 hours ago
Southwest Airlines
Wed, Jan 7 - Sat, Jan 10
ONT
Ontario
PDX
Portland
$137 Roundtrip, found 3 hours ago
$137
Roundtrip
found 3 hours ago
Select Southwest Airlines flight, departing Wed, Jan 7 from Ontario to Portland, returning Sat, Jan 10, priced at $137 found 3 hours ago
Alaska Airlines
Sat, Jan 17 - Wed, Jan 21
ONT
Ontario
PDX
Portland
$137 Roundtrip, just found
$137
Roundtrip
just found
Select Alaska Airlines flight, departing Sat, Jan 17 from Ontario to Portland, returning Wed, Jan 21, priced at $137 just found
Southwest Airlines
Sat, Jan 31 - Sun, Feb 8
ONT
Ontario
PDX
Portland
$138 Roundtrip, found 11 hours ago
$138
Roundtrip
found 11 hours ago
Select Southwest Airlines flight, departing Sat, Jan 31 from Ontario to Portland, returning Sun, Feb 8, priced at $138 found 11 hours ago
Southwest Airlines
Wed, Jan 7 - Sat, Jan 10
ONT
Ontario
PDX
Portland
$142 Roundtrip, found 3 hours ago
$142
Roundtrip
found 3 hours ago
Select Southwest Airlines flight, departing Wed, Jan 7 from Ontario to Portland, returning Sat, Jan 10, priced at $142 found 3 hours ago
Southwest Airlines
Sat, Feb 28 - Tue, Mar 10
ONT
Ontario
PDX
Portland
$142 Roundtrip, found 7 hours ago
$142
Roundtrip
found 7 hours ago
Select Southwest Airlines flight, departing Sat, Feb 28 from Ontario to Portland, returning Tue, Mar 10, priced at $142 found 7 hours ago
Delta
Wed, Jan 28 - Sun, Feb 1
ONT
Ontario
PDX
Portland
$143 Roundtrip, found 3 hours ago
$143
Roundtrip
found 3 hours ago
Select Delta flight, departing Wed, Jan 28 from Ontario to Portland, returning Sun, Feb 1, priced at $143 found 3 hours ago
Frontier Airlines
Thu, Jan 15 - Sun, Jan 25
ONT
Ontario
PDX
Portland
$145 Roundtrip, found 7 hours ago
$145
Roundtrip
found 7 hours ago
Select Frontier Airlines flight, departing Thu, Jan 15 from Ontario to Portland, returning Sun, Jan 25, priced at $145 found 7 hours ago
Alaska Airlines
Wed, Jan 7 - Sat, Jan 10
ONT
Ontario
PDX
Portland
$147 Roundtrip, found 3 hours ago
$147
Roundtrip
found 3 hours ago
Select Alaska Airlines flight, departing Wed, Jan 7 from Ontario to Portland, returning Sat, Jan 10, priced at $147 found 3 hours ago

Find the cheapest month to fly from Ontario (ONT) to Portland (PDX)

October is typically the cheapest month to fly

From $80 - $237 per traveler.
Flights from Ontario (ONT) to Portland (PDX)
Origin airport
Los Angeles - Ontario Intl.
Destination airport
Portland Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, Southwest Airlines, United
Roundtrip price
$132
Distance
838 mi
Average flight time
2 hours 30 mins

Ontario to Portland Flights

The cheapest times to fly from Ontario to Portland

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Ontario to Portland are during the month of February. You can find some of the cheapest flights from Ontario to Portland with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Ontario to Portland

Sunday is one of the best days to book for cheap flights from Ontario to Portland: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Ontario to Portland

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Ontario to Portland in 2026. You can also book with separate airlines for your outbound and return journeys, from $74 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Ontario to Portland flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Ontario to Portland airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Los Angeles - Ontario Intl. Airport (ONT) to Portland Intl. Airport (PDX) cost?
Secure a cheap one-way flight from $74 or cheap return flight from $132 from Los Angeles - Ontario Intl. Airport (ONT) to Portland Intl. Airport (PDX) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Los Angeles - Ontario Intl. Airport (ONT) to Portland Intl. Airport (PDX)?
Traveling in February is a good way to save, as it's the cheapest month for flights between ONT and PDX. You'll usually find the lowest fares during off-peak months.
Which airlines fly direct from Los Angeles - Ontario Intl. Airport (ONT) to Portland Intl. Airport (PDX)?
If you're departing from Los Angeles - Ontario Intl. Airport (ONT), you can hop on a direct flight to Portland Intl. Airport (PDX) with Alaska Airlines.
What is the cheapest airline that flies from Los Angeles - Ontario Intl. Airport (ONT) to Portland Intl. Airport (PDX)?
While prices can change depending on when you travel, Frontier Airlines and Alaska Airlines are often frequently picked for flights between Los Angeles - Ontario Intl. Airport (ONT) and Portland Intl. Airport (PDX). You can also compare airlines on Expedia and use the "Sort by" filter to find the lowest fare for your ONT to PDX flight.
How many flights per day from Los Angeles - Ontario Intl. Airport (ONT) to Portland Intl. Airport (PDX)?
With an average of 2 nonstop flights that operate from Los Angeles - Ontario Intl. Airport (ONT) to Portland Intl. Airport (PDX) each day, you'll be jetting off in no time.
What are the most popular departure times for flights from Los Angeles - Ontario Intl. Airport (ONT) to Portland Intl. Airport (PDX)?
The 11 AM departures from ONT to PDX are the most sought after. Prices can be higher for these popular slots. If you want to save money, choose a less crowded time to fly.
What day of the week has the most flights from ONT to PDX?
Jet off on a Friday if you're looking for the biggest selection of flights from Los Angeles - Ontario Intl. Airport (ONT) to Portland Intl. Airport (PDX).
What is the earliest flight from Los Angeles - Ontario Intl. Airport (ONT) to Portland Intl. Airport (PDX)?
Los Angeles - Ontario Intl. Airport (ONT)'s earliest flight to Portland Intl. Airport (PDX) takes off at approximately 7:00AM UTC-8. With a total travel time of 2h 33m, you'll arrive at around 9:33AM UTC-8.
How long does it take to fly from Los Angeles - Ontario Intl. Airport (ONT) to Portland Intl. Airport (PDX)?
The average flight duration from ONT to PDX is 2 hours and 25 minutes, covering a total distance of 840 mi.
What airline has the least delays from ONT to PDX?
With 100% of flights typically landing on schedule, British Airways has the best on-time performance for direct flights from Los Angeles - Ontario Intl. Airport (ONT) to Portland Intl. Airport (PDX). To monitor your flight status and get notified if anything changes, use the Expedia App.
What is the best time to fly from Los Angeles - Ontario Intl. Airport (ONT) to Portland Intl. Airport (PDX)?
To avoid possible delays on the Los Angeles - Ontario Intl. Airport (ONT) to Portland Intl. Airport (PDX) route, fly before 3 PM. Later flights are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Portland from Los Angeles - Ontario Intl. Airport (ONT)?
Browse your flight options from Los Angeles - Ontario Intl. Airport (ONT) to Portland Intl. Airport (PDX). This is the only airport in Portland you can arrive at if you're taking a direct flight.
Is it cheaper to buy a plane ticket from Los Angeles - Ontario Intl. Airport (ONT) to Portland Intl. Airport (PDX) last-minute?
Waiting until right before your break to book a flight from ONT to PDX often results in higher prices. While it's possible to find some last-minute discounts, they aren't always guaranteed. Allow some flexibility in your schedule for the best chance of getting a bargain.
Is it cheaper to book an ONT to PDX flight and hotel package?
You can save money by booking an ONT to PDX flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one place. Once you've selected your ideal flights and accommodations, you can add extras like activities, tours and car rentals.
Can I cancel or change the date of my flight from Los Angeles - Ontario Intl. Airport (ONT) to Portland Intl. Airport (PDX)?
Usually, it's possible to reschedule or cancel your ONT to PDX flight. However, for bookings made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find further details on our Customer Service portal.

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*Available to One Key members.