HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Oregon

$64+ Cheap flights from Ontario (ONT) to Oregon

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
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Oregon with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Ontario to Oregon

Keep the following information in mind while searching for Ontario to Oregon flight deals. Data was last updated September 15, 2025.

Round-trip from

$114
(CheapOair)

One-way from

$64
(CheapOair)

Popular in

November

Cheapest in

January

Average price

$197

Good round-trip deal

$145 or less

Good one-way deal

$108 or less
From Ontario to Oregon
Search Deals
One-way flight from Ontario to Oregon
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($11 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals
Price to beat on a round-trip flight from Ontario to Oregon.
Search Deals
Price to beat on a one-way flight from Ontario to Oregon.
Search Deals

Find flight deals from Ontario to Oregon

Cheapest flights from Ontario to Oregon
Explore the most affordable flight options available from Ontario to Oregon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This CheapOair deal was found by Cheapflights users on 9/13. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/248:32 amONT - PDX
Nonstop2h 26mFrontier
Mon 10/277:30 pmPDX - ONT
Nonstop2h 22mFrontier
Deal found 9/13$114
This Booking.com deal was found by Cheapflights users on 9/13. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/108:32 amONT - PDX
Nonstop2h 26mFrontier
Mon 10/137:30 pmPDX - ONT
Nonstop2h 22mFrontier
Deal found 9/13$115
This CheapOair deal was found by Cheapflights users on 9/14. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/176:05 amONT - PDX
1 stop12h 35mFrontier
Mon 10/207:30 pmPDX - ONT
Nonstop2h 22mFrontier
Deal found 9/14$120
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/68:07 amONT - PDX
Nonstop2h 26mFrontier
Fri 10/107:30 pmPDX - ONT
Nonstop2h 22mFrontier
Deal found 9/13$121
This Frontier deal was found by Cheapflights users on 9/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/108:32 amONT - PDX
Nonstop2h 26mFrontier
Fri 10/177:30 pmPDX - ONT
Nonstop2h 22mFrontier
Deal found 9/13$126
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/58:07 amONT - PDX
Nonstop2h 26mFrontier
Fri 10/107:30 pmPDX - ONT
Nonstop2h 22mFrontier
Deal found 9/13$129
This CheapOair deal was found by Cheapflights users on 9/13. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/68:07 amONT - PDX
Nonstop2h 26mFrontier
Mon 10/1312:44 pmPDX - ONT
1 stop11h 06mFrontier
Deal found 9/13$130
This CheapOair deal was found by Cheapflights users on 9/14. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/38:07 amONT - PDX
Nonstop2h 26mFrontier
Mon 10/67:17 pmPDX - ONT
Nonstop2h 21mFrontier
Deal found 9/14$131
This Cheapflightsfares deal was found by Cheapflights users on 9/13. 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.
Fri 10/108:32 amONT - PDX
Nonstop2h 26mFrontier
Sun 10/127:30 pmPDX - ONT
Nonstop2h 22mFrontier
Deal found 9/13$133
This Frontier deal was found by Cheapflights users on 9/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/128:25 amONT - PDX
Nonstop2h 26mFrontier
Sun 10/197:30 pmPDX - ONT
Nonstop2h 22mFrontier
Deal found 9/13$134
This Frontier deal was found by Cheapflights users on 9/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/138:32 amONT - PDX
Nonstop2h 26mFrontier
Fri 10/1712:43 pmPDX - ONT
1 stop11h 07mFrontier
Deal found 9/13$135
This Southwest deal was found by Cheapflights users on 9/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/44:55 pmONT - BOI
1 stop5h 10mSouthwest
Wed 10/811:40 amBOI - ONT
1 stop6h 20mSouthwest
Deal found 9/12$164

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Oregon 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 September 15, 2025.
Use the filters below to find and compare flights from Ontario to Oregon that are best for you.

Fly from

Ontario

Fly to

Oregon

Route

Depart

Return

Price

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Tue 10/28

6:15 am-11:05 am

1 stop4h 50m

Portland

Tue 11/4

5:00 am-12:10 pm

1 stop7h 10m

$114

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 1/24

8:30 am-4:40 pm

2 stops8h 10m

Portland

Sat 1/31

6:10 am-12:55 pm

2 stops6h 45m

$161

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Thu 1/22

5:05 pm-11:54 pm

1 stop6h 49m

Portland

Tue 2/3

5:45 pm-10:38 pm

1 stop4h 53m

$167

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Mon 1/26

5:05 pm-11:54 pm

1 stop6h 49m

Portland

Wed 1/28

10:15 am-4:19 pm

1 stop6h 04m

$167

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 11/15

11:46 am-7:19 pm

1 stop7h 33m

Portland

Wed 11/19

5:26 pm-10:55 pm

1 stop5h 29m

$167

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Wed 10/8

1:15 pm-6:09 pm

1 stop4h 54m

Portland

Sat 10/11

5:00 pm-9:20 pm

1 stop4h 20m

$167

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Wed 1/21

5:05 pm-11:54 pm

1 stop6h 49m

Portland

Thu 1/29

5:45 pm-10:38 pm

1 stop4h 53m

$167

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 10/11

5:45 pm-8:03 pm

Nonstop2h 18m

Portland

Wed 10/15

9:30 pm-11:51 pm

Nonstop2h 21m

$177

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Tue 11/4

10:59 am-1:25 pm

Nonstop2h 26m

Portland

Sat 11/8

2:46 pm-5:05 pm

Nonstop2h 19m

$177

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Wed 11/5

6:03 pm-8:29 pm

Nonstop2h 26m

Portland

Sat 11/8

2:46 pm-5:05 pm

Nonstop2h 19m

$177

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/12

Showing 1-10 of 60 results
1
2
3
...
6

Best time to book a flight from Ontario to Oregon

Have a flexible travel schedule? Discover the best time to fly to Oregon 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 Oregon

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

Currently, November is the cheapest month in which you can book a flight from Ontario to Oregon (average of $277). Flying from Ontario to Oregon 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 OR?

Find hourly flight availability from Ontario to Oregon. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 15, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Oregon as you normally would.

Weekly flight availability from Ontario to Oregon

Explore weekly flight availability from Ontario to Oregon. 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 September 15, 2025.

The most flights from ONT to USOR are scheduled on a Monday (7 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (4 on average).

Reviews of airlines servicing Oregon

Get insights into the airlines that provide service to Oregon. 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 Oregon. Reviews last updated September 15, 2025.
See what other customers who have flown with Alaska Airlines, Southwest, and Hawaiian Airlines from Ontario to Oregon have to say. 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

Food

7.1

Crew

8.5

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Crew

8.5

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Southwest
8.0
Very good
4,245 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Crew

8.5

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Hawaiian Airlines
7.8
Good
2,723 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Crew

8.5

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
United Airlines
7.4
Good
8,931 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Crew

8.5

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Frontier
5.8
Fair
3,173 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Crew

8.5

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

Related info for your journey

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

  • What airport do you fly from for flights from Ontario to Oregon?

    Ontario (ONT), located 3.1 mi from the city center, is the airport you fly out of when you book flights from Ontario to Oregon.

  • How popular is this Ontario to Oregon flight route?

    The Ontario to Oregon flight path was viewed by 79 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Ontario to Oregon?

    There are many flights that can get you from Ontario to Oregon in 4h 28m. Fly via Southwest, Delta, or Hawaiian Airlines to get the fastest option. Ontario and Oregon are separated by a distance of 757 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    $84 is the cheapest one-way deal found within the past few days, from Southwest. You may also be able to find cheap deals on Delta and United Airlines, with prices starting from $89 and $91, respectively.

  • What are the most popular routes from Ontario to Oregon?

    Most travelers choose Ontario - Portland, Ontario - Boise Air Term. Gowen Fld or Ontario - Eugene when deciding on the best route from Ontario to Oregon.

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

    Consider Alaska Airlines (93%), SkyWest Airlines (92%) or Hawaiian Airlines (92%) when booking your flight. These represent the most reliable airlines when flying from Ontario to Oregon.

  • What are the cheapest flights from Ontario to Oregon?

    On average you can expect to pay $350 for a flight from Ontario to Oregon. The cheapest flight overall is $32 while the most popular route, (Ontario - Portland) is currently priced at $67.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ontario to Oregon 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 Oregon?

    Currently, November is the cheapest month in which you can book a flight from Ontario to Oregon (average of $277). Flying from Ontario to Oregon 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Oregon

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to John F Kennedy Intl flights
San Francisco to John F Kennedy Intl flights
Los Angeles to Seattle flights
Los Angeles to Newark flights
San Francisco to Las Vegas flights
Los Angeles to Honolulu flights
Los Angeles to Dallas/Fort Worth flights
Los Angeles to LaGuardia flights
San Francisco to Newark flights
Los Angeles to O'Hare Intl flights
San Francisco to Los Angeles flights
Los Angeles to San Francisco flights
Los Angeles to Las Vegas flights
Ontario to Seattle flights
Los Angeles to Boston flights
San Francisco to Honolulu flights
San Francisco to O'Hare Intl flights
Santa Ana to Las Vegas flights
Ontario to John F Kennedy Intl flights
San Francisco to LaGuardia flights
San Francisco to Seattle flights
San Francisco to Santa Ana flights
San Francisco to Ontario flights
San Francisco to Dallas/Fort Worth flights
Ontario to San Francisco flights
Los Angeles to Miami flights
Santa Ana to San Francisco flights
Los Angeles to Orlando flights
Oakland to Las Vegas flights
Burbank to Las Vegas flights
Los Angeles to San Jose flights
San Francisco to Boston flights
Santa Ana to Seattle flights
Los Angeles to Reagan-National flights
San Jose to Las Vegas flights
Los Angeles to Dulles Intl flights
Los Angeles to Hobby flights
Burbank to Newark flights
San Jose to Seattle flights
San Diego to John F Kennedy Intl flights
Los Angeles to Portland flights
San Jose to Los Angeles flights
Ontario to O'Hare Intl flights
Los Angeles to Austin flights
San Francisco to Denver flights
Ontario to Newark flights
Los Angeles to Denver flights
Santa Ana to Newark flights
Los Angeles to Kahului flights
San Diego to Seattle flights

Top 6 airlines flying from Ontario to Oregon

Discover the top 6 airlines that operate flights from Ontario to Oregon. 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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$72Average$150FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$98Average$272FlexibilityNo cancel feeOn-time85%
DeltaCheapest$137Average$283FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$153Average$356FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$156Average$316FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$156Average$336FlexibilityNo cancel feeOn-time75%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.