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$62+ Cheap flights from Ontario to Portland (ONT - PDX)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/22. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PDX
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
1 adult, Economy
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Cheapflights Tip: The best prices from Ontario to Portland are usually found in August or September, booked 83 days in advance, depart on a Thursday or Friday and return on a Friday

Cheap flight deals from Ontario to Portland

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Portland (PDX). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 29, 2025.

Round-trip from

$109
(Cheapflightsfares)

One-way from

$62
(Frontier)

Popular in

March

Cheapest in

August

Average price

$180

Good round-trip deal

$138 or less

Good one-way deal

$96 or less
From Ontario to Portland
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One-way flight from Ontario to Portland
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Highest demand for flights based on searches. 15% potential increase in price ($36 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Ontario to Portland.
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Price to beat on a one-way flight from Ontario to Portland.
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Find flight deals from Ontario to Portland

Cheapest flights from Ontario to Portland
Explore the most affordable flight options available from Ontario to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/172:31 pmONT - PDX
Nonstop2h 18mFrontier
Fri 8/227:04 pmPDX - ONT
Nonstop2h 23mFrontier
Deal found 7/28$112
This Alaska Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1111:15 amONT - PDX
Nonstop2h 19mAlaska Airlines
Wed 10/159:30 pmPDX - ONT
Nonstop2h 21mAlaska Airlines
Deal found 7/29$157

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated July 29, 2025.
Use the filters below to find and compare flights from Ontario to Portland that are best for you.

Fly from

Ontario

Fly to

Portland

Route

Depart

Return

Price

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sun 8/17

2:31 pm-4:49 pm

Nonstop2h 18m

Portland

Fri 8/22

7:04 pm-9:27 pm

Nonstop2h 23m

$112

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 10/4

1:10 pm-7:23 pm

1 stop6h 13m

Portland

Sat 10/18

5:05 am-12:01 pm

1 stop6h 56m

$159

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Tue 9/2

7:10 am-9:29 am

Nonstop2h 19m

Portland

Sat 9/6

7:03 am-9:26 am

Nonstop2h 23m

$174

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sun 8/24

8:18 am-10:42 am

Nonstop2h 24m

$63

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Wed 8/27

8:00 am-6:57 pm

1 stop10h 57m

$72

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 9/27

6:00 am-1:47 pm

1 stop7h 47m

$98

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 8/23

9:15 am-4:25 pm

1 stop7h 10m

$99

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Fri 8/22

11:40 am-4:59 pm

1 stop5h 19m

$117

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 8/30

1:42 pm-8:37 pm

1 stop6h 55m

$134

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

The best insider tips for Ontario to Portland flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Ontario to Portland trip
Airlines
Frontier

Frontier's UpFront Plus offers empty middle seats for extra comfort.


Frontier Airlines offers Zone 1 boarding with carry-on purchase.

Read more about Frontierby Marisa Garcia
Alaska Airlines

Alaska Airlines offers 32” legroom in Main Cabin, ideal for short flights.


Alaska Airlines' Wi-Fi is a flat fee, great for work on short flights.

Read more about Alaska Airlinesby Robert Schrader
Airports
ONT

ONT offers a smooth security process with less congestion than LAX, making it ideal for quick departures.

Read more about ONTby Bill Fink
PDX

Use the MAX light rail for a convenient 40-minute ride to downtown Portland from PDX, with trains every 15 minutes.

Read more about PDXby Brandon Schultz
Our travel experts
Marisa Garcia

Marisa Garcia

Expert on Frontier

Marisa Garcia

Marisa Garcia

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialized in airline interiors and regulations. Ten years ago, she pivoted to journalism. She shares her insights in leading aviation, travel, and business publications and on her site FlightChic.

Read more
Robert Schrader

Robert Schrader

Expert on Alaska Airlines

Robert Schrader

Robert Schrader

One of the web's original travel bloggers, Robert launched his first site Leave Your Daily Hell in 2009. Since then, he's expanded into destination niche sites (one each for Japan, Thailand and Taiwan), in addition to having written for the inflight magazines of Singapore Airlines and Korean Air. Overall, he's visited nearly 100 countries, and flies business as often as possible.

Read more
Bill Fink

Bill Fink

Expert on ONT

Bill Fink

Bill Fink

Bill is an award-winning travel writer with extensive credits covering airlines and the aviation industry for publications including AARP, AFAR, The Points Guy and Yahoo. Based in Portland, Oregon, Bill has traveled to more than 75 countries - and been late for his flight in most of them. He once achieved top-level frequent flier status for all of American, Delta and United Airlines during a single year.

Read more
Brandon Schultz

Brandon Schultz

Expert on PDX

Brandon Schultz

Brandon Schultz

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

Read more

Best time to book a flight from Ontario to Portland

Have a flexible travel schedule? Discover the best time to fly to Portland from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

How far ahead should I book a flight from Ontario to Portland?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Portland. Price data was last updated on July 25, 2025.

The price you pay for your flight from Ontario to Portland may vary depending on when you book. For the best chance of a lower fare, look to book 83 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Ontario to Portland?

Currently, November is the cheapest month in which you can book a flight from Ontario to Portland (average of $277). Flying from Ontario to Portland in March is currently the most expensive (average of $368). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to PDX?

Find hourly flight availability from Ontario to Portland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 29, 2025.

It’s typically best to fly out from Ontario to Portland in the afternoon. Doing so could potentially save you 37% on the flight price compared to flying in the morning, which is usually more expensive.

What is the cheapest day to fly from Ontario to Portland?

Use this chart to determine the cheapest time to fly round-trip from Ontario to Portland. Price data was last updated on July 27, 2025.

Travelers seeking maximum savings on their Ontario to Portland flight should consider departing on Wednesday at noon when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Ontario to Portland

Explore weekly flight availability from Ontario to Portland. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 29, 2025.

The most flights from ONT to PDX are scheduled on a Sunday (10 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (6 on average).

Reviews of airlines servicing Portland

Get insights into the airlines that provide service to Portland. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Portland. Reviews last updated July 29, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest, and Delta from Ontario to Portland. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,238 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,977 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.8
Good
2,604 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Portland. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from Ontario to Portland?

    If you wish to fly to Portland from Ontario, then you need to book flights from Ontario to Portland. There are 7 flights from Ontario (ONT) to Portland (PDX) per day to choose from. Flights to Portland from Ontario are available from 7 different airlines, which means you should have some options if you want to compare airfare deals. 2h 14m is how long a nonstop flight from Ontario to Portland typically takes.

  • How popular is this Ontario to Portland flight route?

    Flights from Ontario to Portland have been viewed 87 times in the past calendar month.

  • What are the cheapest airlines flying from Ontario to Portland round-trip?

    Cheapflights users have booked flights from Ontario to Portland round-trip from $109. Another airline that can offer you cheap pricing is American Airlines. Users have found that Frontier is 44% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Ontario to Portland one-way?

    One-way options have recently been found by users for as low as $62 on Frontier. Other airlines that offer cheap prices include Alaska Airlines from $88 and Southwest from $99 one-way.

  • What are the most reliable airlines from Ontario to Portland?

    Before booking your flight to Portland from Ontario, check out the most reliable airlines to get you to your destination on time: Alaska Airlines (92%), Horizon Air (92%), Hawaiian Airlines( 91%).

  • What are the cheapest flights from Ontario to Portland?

    On average you can expect to pay $148 for a flight from Ontario to Portland. The cheapest flight overall is $59 while the most popular route, (Ontario - Portland) is currently priced at $83.

  • Can I find deals for flights from Ontario to Portland that include hotel bookings?

    Yes. In addition to deals on Ontario to Portland flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Portland?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Portland.

  • Can I find deals for business class flights from Ontario to Portland?

    Yes. Cheapflights offers flight deals from Ontario to Portland by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Portland?

    Currently, November is the cheapest month in which you can book a flight from Ontario to Portland (average of $277). Flying from Ontario to Portland in March is currently the most expensive (average of $368). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Portland?

Book flights to Portland if you plan to visit one of these locations
Vancouver
Seaside
Beaverton
Clackamas
Lincoln City
McMinnville
Lake Oswego
Hillsboro
Astoria
Cannon Beach
Long Beach
Longview
Tigard
Depoe Bay
Woodburn
Stevenson
Wilsonville
Pacific City
Troutdale
Tillamook

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Ontario to Portland

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Top 7 airlines flying from Ontario to Portland

Discover the top 7 airlines that operate flights from Ontario to Portland. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$45Average$96FlexibilityNo cancel feeOn-time65%
FrontierCheapest$58Average$142FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$108Average$254FlexibilityNo cancel feeOn-time85%
DeltaCheapest$137Average$228FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$156Average$261FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$172Average$273FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$176Average$261FlexibilityNo cancel feeOn-time69%

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