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$65+ 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 12/6. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PDX
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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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 October 30, 2025.

This CheapOair deal was found by Cheapflights users on 10/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/137:44 pmONT - PDX
1 stop22h 47mFrontier
Tue 11/181:26 pmPDX - ONT
1 stop8h 01mFrontier
Deal found 10/28$110
This Frontier deal was found by Cheapflights users on 10/27. 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.
Tue 12/236:17 pmONT - PDX
Nonstop2h 22mFrontier
Tue 12/302:19 pmPDX - ONT
Nonstop2h 10mFrontier
Deal found 10/27$111
This CheapOair deal was found by Cheapflights users on 10/30. 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 11/146:53 amONT - PDX
1 stop29h 03mFrontier
Tue 11/181:26 pmPDX - ONT
1 stop8h 01mFrontier
Deal found 10/30$127
This CheapOair deal was found by Cheapflights users on 10/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/67:44 pmONT - PDX
1 stop22h 52mFrontier
Mon 11/1712:51 pmPDX - ONT
Nonstop2h 19mFrontier
Deal found 10/28$129
This CheapOair deal was found by Cheapflights users on 10/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/156:53 amONT - PDX
1 stop29h 03mFrontier
Sun 11/233:52 pmPDX - ONT
Nonstop2h 19mFrontier
Deal found 10/28$134
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 11/1712:05 pmONT - PDX
Nonstop2h 26mFrontier
Mon 12/14:01 pmPDX - ONT
Nonstop2h 20mFrontier
Deal found 10/27$135
This Mytrip deal was found by Cheapflights users on 10/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/412:04 pmONT - BOI
1 stop22h 45mFrontier
Sun 12/712:44 pmBOI - ONT
1 stop26h 41mFrontier
Deal found 10/29$136
This CheapOair deal was found by Cheapflights users on 10/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1412:05 pmONT - PDX
Nonstop2h 26mFrontier
Mon 11/1712:51 pmPDX - ONT
Nonstop2h 19mFrontier
Deal found 10/28$140
This CheapOair deal was found by Cheapflights users on 10/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/137:44 pmONT - PDX
1 stop22h 47mFrontier
Sun 11/167:57 pmPDX - ONT
1 stop11h 20mFrontier
Deal found 10/28$143
This Mytrip deal was found by Cheapflights users on 10/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/66:15 amONT - PDX
1 stop27h 19mFrontier
Sun 12/712:51 pmPDX - ONT
1 stop25h 34mFrontier
Deal found 10/28$144
This Delta deal was found by Cheapflights users on 10/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/104:49 pmONT - BOI
1 stop6h 53mDelta
Tue 12/1611:10 amBOI - ONT
1 stop5h 59mDelta
Deal found 10/29$147
This CheapOair deal was found by Cheapflights users on 10/29. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/42:59 pmONT - PDX
1 stop18h 35mFrontier
Mon 12/89:31 amPDX - ONT
1 stop11h 46mFrontier
Deal found 10/29$150

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 October 30, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$110
(CheapOair)

One-way from

$65
(Mytrip)

Popular in

November

Cheapest in

January

Average price

$203

Good round-trip deal

$195 or less

Good one-way deal

$127 or less
Provider with most accurate pricing for Los Angeles-Portland flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Portland flights.
Search Deals
From Ontario to Oregon
Search Deals
One-way flight from Ontario to Oregon
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($16 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 October 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

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 October 30, 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

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Thu 12/11

12:04 pm-11:49 am

1 stop22h 45m

Boise Air Term. Gowen Fld

Sun 12/14

12:44 pm-2:25 pm

1 stop26h 41m

$153

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Wed 12/10

5:49 pm-10:40 pm

1 stop4h 51m

Portland

Tue 12/16

7:09 pm-11:58 pm

1 stop4h 49m

$157

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Wed 12/3

7:10 am-9:41 am

Nonstop2h 31m

Portland

Tue 12/9

10:30 am-12:46 pm

Nonstop2h 16m

$157

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Wed 12/10

5:49 pm-10:40 pm

1 stop4h 51m

Portland

Wed 12/17

7:09 pm-11:58 pm

1 stop4h 49m

$157

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Tue 2/10

7:56 pm-10:57 pm

Nonstop2h 01m

Boise Air Term. Gowen Fld

Sun 2/15

4:30 pm-5:42 pm

Nonstop2h 12m

$157

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Thu 2/5

7:56 pm-10:57 pm

Nonstop2h 01m

Boise Air Term. Gowen Fld

Tue 2/10

6:09 pm-7:16 pm

Nonstop2h 07m

$157

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Wed 2/25

6:22 pm-9:39 pm

Nonstop2h 17m

Boise Air Term. Gowen Fld

Mon 3/2

4:30 pm-5:42 pm

Nonstop2h 12m

$157

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Wed 1/7

7:56 pm-10:57 pm

Nonstop2h 01m

Boise Air Term. Gowen Fld

Sun 1/11

6:09 pm-7:16 pm

Nonstop2h 07m

$157

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Thu 11/27

1:20 pm-6:48 pm

1 stop5h 28m

Portland

Wed 12/3

7:09 pm-11:58 pm

1 stop4h 49m

$167

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Thu 12/11

5:49 pm-10:40 pm

1 stop4h 51m

Portland

Wed 12/17

7:09 pm-11:58 pm

1 stop4h 49m

$167

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 60 results
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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, March is the cheapest month in which you can book a flight from Ontario to Oregon (average of $42). Flying from Ontario to Oregon in July is currently the most expensive (average of $89). 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 October 30, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 19% on flights from Ontario to Oregon by exploring options for tickets at noon.

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

Use this chart to determine the cheapest time to fly round-trip from Ontario to Oregon. Price data was last updated on December 16, 2024.

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

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 October 30, 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
11,214 reviews

Crew

8.5

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Food

7.1

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
11,214 reviews
Alaska Airlines
8.0
Very good
11,214 reviews

Crew

8.5

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Food

7.1

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
4,242 reviews
Alaska Airlines
8.0
Very good
11,214 reviews

Crew

8.5

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Food

7.1

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
2,797 reviews
Alaska Airlines
8.0
Very good
11,214 reviews

Crew

8.5

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Food

7.1

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
8,998 reviews
Alaska Airlines
8.0
Very good
11,214 reviews

Crew

8.5

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Food

7.1

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
3,123 reviews
Alaska Airlines
8.0
Very good
11,214 reviews

Crew

8.5

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Food

7.1

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 69 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 2h 31m. Fly via Frontier, Delta, or Alaska Airlines to get the fastest option. Ontario and Oregon are separated by a distance of 839 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?

    $79 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on Alaska Airlines and American Airlines, with prices starting from $88 and $129, 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 British Airways (100%), SkyWest Airlines (91%) or Alaska Airlines (91%) 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 $229 for a flight from Ontario to Oregon. The cheapest flight overall is $88 while the most popular route, (Ontario - Portland) is currently priced at $92.

  • 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, March is the cheapest month in which you can book a flight from Ontario to Oregon (average of $42). Flying from Ontario to Oregon in July is currently the most expensive (average of $89). 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

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Alternative routes for Ontario to Oregon

See prices for flight routes from nearby airports that may be better suited for you.
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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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$77Average$157FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$88Average$272FlexibilityNo cancel feeOn-time85%
DeltaCheapest$137Average$288FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$153Average$336FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$158Average$333FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$158Average$319FlexibilityNo cancel feeOn-time63%

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