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

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.
PDX — ONT
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from Oregon to Ontario

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

Round-trip from

$66
(Kiwi.com)

One-way from

$64
(Cheapflightsfares)

Popular in

November

Cheapest in

January

Average price

$197

Good round-trip deal

$105 or less

Good one-way deal

$102 or less
From Oregon to Ontario
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One-way flight from Oregon to Ontario
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Highest demand for flights based on searches. 9% potential increase in price ($20 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 September 2025
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Price to beat on a round-trip flight from Oregon to Ontario.
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Price to beat on a one-way flight from Oregon to Ontario.
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Find flight deals from Oregon to Ontario

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

This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/177:30 pmPDX - ONT
Nonstop2h 22mFrontier
Sun 10/268:25 amONT - PDX
Nonstop2h 26mFrontier
Deal found 9/14$66
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 10/177:30 pmPDX - ONT
Nonstop2h 22mFrontier
Mon 10/208:32 amONT - PDX
Nonstop2h 26mFrontier
Deal found 9/13$67
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/37:17 pmPDX - ONT
Nonstop2h 21mFrontier
Mon 10/68:07 amONT - PDX
Nonstop2h 26mFrontier
Deal found 9/13$68
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/127:30 pmPDX - ONT
Nonstop2h 22mFrontier
Sun 10/198:25 amONT - PDX
Nonstop2h 26mFrontier
Deal found 9/14$75
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.
Fri 9/197:17 pmPDX - ONT
Nonstop2h 21mFrontier
Mon 9/228:07 amONT - PDX
Nonstop2h 26mFrontier
Deal found 9/13$82
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 9/267:17 pmPDX - ONT
Nonstop2h 21mFrontier
Sun 9/288:07 amONT - PDX
Nonstop2h 26mFrontier
Deal found 9/13$83
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 9/227:17 pmPDX - ONT
Nonstop2h 21mFrontier
Mon 9/298:07 amONT - PDX
Nonstop2h 26mFrontier
Deal found 9/13$84
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 10/1712:43 pmPDX - ONT
1 stop11h 07mFrontier
Sun 10/198:25 amONT - PDX
Nonstop2h 26mFrontier
Deal found 9/14$106
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/67:17 pmPDX - ONT
Nonstop2h 21mFrontier
Wed 10/86:53 amONT - PDX
1 stop28h 45mFrontier
Deal found 9/14$107
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.
Sat 10/47:15 amPDX - ONT
1 stop12h 39mFrontier
Sun 10/58:07 amONT - PDX
Nonstop2h 26mFrontier
Deal found 9/13$108
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.
Tue 10/712:25 pmEUG - ONT
1 stop4h 35mSouthwest
Tue 10/146:15 amONT - EUG
1 stop6h 30mSouthwest
Deal found 9/12$150
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/299:26 pmBOI - ONT
1 stop25h 30mMultiple Airlines
Fri 10/310:28 pmONT - BOI
1 stop13h 53mMultiple Airlines
Deal found 9/14$200

Cheapflights Fare Finder

 
Customize your flight search to find flights from Oregon to Ontario 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 Oregon to Ontario that are best for you.

Fly from

Oregon

Fly to

Ontario

Route

Depart

Return

Price

PortlandOntario

PDX - ONT

PDXONT

Portland

Fri 10/24

7:30 pm-9:52 pm

Nonstop2h 22m

Ontario

Mon 10/27

8:32 am-10:58 am

Nonstop2h 26m

$75

PortlandOntario

PDX - ONT

PDXONT

Portland

Thu 10/16

12:43 pm-9:35 am

1 stop20h 52m

Ontario

Tue 10/21

7:04 am-11:48 am

1 stop28h 44m

$144

EugeneOntario

EUG - ONT

EUGONT

Eugene

Tue 10/7

12:25 pm-5:00 pm

1 stop4h 35m

Ontario

Tue 10/14

6:15 am-12:45 pm

1 stop6h 30m

$150

PortlandOntario

PDX - ONT

PDXONT

Portland

Wed 2/18

7:14 pm-11:52 pm

1 stop4h 38m

Ontario

Mon 2/23

5:05 pm-11:54 pm

1 stop6h 49m

$167

PortlandOntario

PDX - ONT

PDXONT

Portland

Tue 2/17

7:14 pm-11:52 pm

1 stop4h 38m

Ontario

Mon 2/23

5:05 pm-11:54 pm

1 stop6h 49m

$167

PortlandOntario

PDX - ONT

PDXONT

Portland

Tue 2/24

7:14 pm-11:52 pm

1 stop4h 38m

Ontario

Thu 2/26

5:05 pm-11:54 pm

1 stop6h 49m

$167

PortlandOntario

PDX - ONT

PDXONT

Portland

Sat 11/8

2:46 pm-5:05 pm

Nonstop2h 19m

Ontario

Wed 11/12

10:59 am-1:25 pm

Nonstop2h 26m

$177

PortlandOntario

PDX - ONT

PDXONT

Portland

Thu 12/4

2:15 pm-8:55 pm

1 stop6h 40m

Ontario

Sun 12/7

6:25 am-12:05 pm

1 stop5h 40m

$184

PortlandOntario

PDX - ONT

PDXONT

Portland

Wed 12/3

7:00 am-11:55 am

1 stop4h 55m

Ontario

Sun 12/7

6:25 am-12:05 pm

1 stop5h 40m

$184

PortlandOntario

PDX - ONT

PDXONT

Portland

Thu 10/9

9:30 pm-11:51 pm

Nonstop2h 21m

Ontario

Tue 10/14

7:10 am-9:30 am

Nonstop2h 20m

$187

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/12

Showing 1-10 of 60 results
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Best time to book a flight from Oregon to Ontario

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

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

Currently, August is the cheapest month in which you can book a flight from Oregon to Ontario (average of $246). Flying from Oregon to Ontario in March is currently the most expensive (average of $328). 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 OR to ONT?

Find hourly flight availability from Oregon to Ontario. 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.

When flying from Oregon to Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Oregon to Ontario

Explore weekly flight availability from Oregon to Ontario. 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 USOR to ONT are scheduled on a Monday (8 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (4 on average).

Related info for your journey

Find useful and relevant information for your journey from Oregon to Ontario. 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 into for flights to Ontario from Oregon?

    Ontario (ONT) is the airport you will fly into if you book a flight from Oregon to Ontario. It is only a 3.1 mi journey from Ontario (ONT) to Ontario’s city center.

  • How popular is this Oregon to Ontario flight route?

    This flight path from Oregon to Ontario was viewed by 66 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 Oregon to Ontario?

    Airlines like Frontier, Southwest, and Delta fly from Oregon to Ontario in about 4h 35m. The time it takes to get you to your destination can typically vary by up to 6h 32m. There are 757 mi between Oregon and Ontario. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    For one-way options, check prices for Southwest. According to our data, you can fly for as low as $75. Users have also found prices from $78 and $79 on Frontier and Delta, respectively.

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

    The most popular route from Oregon to Ontario is Portland - Ontario. You may also consider Eugene - Ontario or Boise Air Term. Gowen Fld - Ontario.

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

    No one likes to see their flight delayed. When booking a flight from Oregon to Ontario consider choosing Alaska Airlines (85%), Hawaiian Airlines (85%) or British Airways (85%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Oregon to Ontario?

    The cheapest flight price from Oregon to Ontario is $49. On average you can expect to pay $162. The most popular route, (Portland - Ontario), can usually be booked for $67.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Oregon to Ontario (average of $246). Flying from Oregon to Ontario in March is currently the most expensive (average of $328). 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 Oregon to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Oregon to Ontario

Discover the top 6 airlines that operate flights from Oregon to Ontario. 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$64Average$144FlexibilityNo cancel feeOn-time62%
DeltaCheapest$93Average$331FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$98Average$241FlexibilityNo cancel feeOn-time85%
United AirlinesCheapest$158Average$343FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$161Average$344FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$173Average$304FlexibilityNo cancel feeOn-time63%

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