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$59+ 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 5/22. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — ONT
Apr 5 — Apr 121
Sat 4/5
Sat 4/12
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 March 31, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$158
(Cheapflightsfares)

One-way from

$59
(Cheapflightsfares)

Popular in

March

Cheapest in

January

Average price

$257

Good round-trip deal

$184 or less

Good one-way deal

$108 or less
Provider with most accurate pricing for Portland-Los Angeles flight deals.
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Provider most trusted by Cheapflights users for Portland-Los Angeles flights.
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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. 0% potential increase in price ($1 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 31, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 3/30. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/1811:13 amPDX - ONT
Nonstop2h 22mFrontier
Tue 6/242:30 pmONT - PDX
Nonstop2h 25mFrontier
Deal found 3/30$158
This Expedia deal was found by Cheapflights users on 3/31. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2911:04 amPDX - ONT
Nonstop2h 20mMultiple Airlines
Wed 6/45:55 pmONT - PDX
Nonstop2h 31mMultiple Airlines
Deal found 3/31$164
This Hawaiian Airlines deal was found by Cheapflights users on 3/31. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/297:00 amPDX - ONT
Nonstop2h 16mHawaiian Airlines
Tue 5/68:59 pmONT - PDX
Nonstop2h 21mHawaiian Airlines
Deal found 3/31$177
This United Airlines deal was found by Cheapflights users on 3/31. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/217:54 amPDX - ONT
1 stop4h 30mUnited Airlines
Sun 5/256:00 amONT - PDX
1 stop6h 33mUnited Airlines
Deal found 3/31$182
This Alaska Airlines deal was found by Cheapflights users on 3/31. 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.
Tue 4/299:42 pmPDX - ONT
Nonstop2h 16mAlaska Airlines
Wed 5/76:00 amONT - PDX
1 stop4h 52mAlaska Airlines
Deal found 3/31$187
This Southwest deal was found by Cheapflights users on 3/31. 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.
Wed 5/146:45 amPDX - ONT
1 stop3h 25mSouthwest
Mon 5/196:20 pmONT - PDX
1 stop3h 55mSouthwest
Deal found 3/31$212
This CheapOair deal was found by Cheapflights users on 3/31. 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 5/152:57 pmBOI - ONT
1 stop10h 02mFrontier
Sat 5/1712:59 amONT - BOI
1 stop11h 38mFrontier
Deal found 3/31$226
This Hawaiian Airlines deal was found by Cheapflights users on 3/30. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/291:30 pmMFR - ONT
1 stop6h 59mHawaiian Airlines
Tue 5/66:00 amONT - MFR
1 stop5h 10mHawaiian Airlines
Deal found 3/30$238
This Alaska Airlines deal was found by Cheapflights users on 3/29. 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.
Tue 4/296:03 amBOI - ONT
1 stop4h 13mAlaska Airlines
Wed 5/285:55 pmONT - BOI
1 stop5h 04mAlaska Airlines
Deal found 3/29$238
This Delta deal was found by Cheapflights users on 3/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/1411:50 amMFR - ONT
1 stop6h 30mDelta
Wed 5/216:00 amONT - MFR
1 stop5h 10mDelta
Deal found 3/30$239
This Delta deal was found by Cheapflights users on 3/29. 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.
Tue 4/294:40 pmBOI - ONT
1 stop7h 03mDelta
Tue 5/2710:01 amONT - BOI
1 stop5h 41mDelta
Deal found 3/29$239
This American Airlines deal was found by Cheapflights users on 3/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/268:45 amPDX - ONT
1 stop7h 14mAmerican Airlines
Mon 4/287:25 pmONT - PDX
1 stop4h 37mAmerican Airlines
Deal found 3/30$247

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 March 31, 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

Wed 6/18

11:13 am-1:35 pm

Nonstop2h 22m

Ontario

Tue 6/24

2:30 pm-4:55 pm

Nonstop2h 25m

$158

PortlandOntario

PDX - ONT

PDXONT

Portland

Thu 5/29

11:04 am-1:24 pm

Nonstop2h 20m

Ontario

Wed 6/4

5:55 pm-8:26 pm

Nonstop2h 31m

$164

PortlandOntario

PDX - ONT

PDXONT

Portland

Tue 4/29

7:00 am-9:16 am

Nonstop2h 16m

Ontario

Tue 5/6

8:59 pm-11:20 pm

Nonstop2h 21m

$177

PortlandOntario

PDX - ONT

PDXONT

Portland

Wed 5/21

7:54 am-12:24 pm

1 stop4h 30m

Ontario

Sun 5/25

6:00 am-12:33 pm

1 stop6h 33m

$182

PortlandOntario

PDX - ONT

PDXONT

Portland

Tue 4/29

9:42 pm-11:58 pm

Nonstop2h 16m

Ontario

Wed 5/7

6:00 am-10:52 am

1 stop4h 52m

$187

PortlandOntario

PDX - ONT

PDXONT

Portland

Wed 5/14

6:45 am-10:10 am

1 stop3h 25m

Ontario

Mon 5/19

6:20 pm-10:15 pm

1 stop3h 55m

$212

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Thu 5/15

2:57 pm-11:59 pm

1 stop10h 02m

Ontario

Sat 5/17

12:59 am-1:37 pm

1 stop11h 38m

$226

PortlandOntario

PDX - ONT

PDXONT

Portland

Wed 4/30

5:15 pm-10:43 pm

1 stop5h 28m

Ontario

Thu 5/1

2:35 pm-7:10 pm

1 stop4h 35m

$227

MedfordOntario

MFR - ONT

MFRONT

Medford

Tue 4/29

1:30 pm-8:29 pm

1 stop6h 59m

Ontario

Tue 5/6

6:00 am-11:10 am

1 stop5h 10m

$238

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Tue 4/29

6:03 am-9:16 am

1 stop4h 13m

Ontario

Wed 5/28

5:55 pm-11:59 pm

1 stop5h 04m

$238

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

Showing 1-10 of 58 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 $326). 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 March 31, 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 March 31, 2025.

The most flights from USOR to ONT are scheduled on a Friday (8 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (5 on average).

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated March 31, 2025.
See what other customers who have flown with Alaska Airlines, Southwest and Delta from Oregon to Ontario have to say. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,818 reviews

Entertainment

7.1

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Food

7.1

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
Alaska Airlines
8.0
Very good
9,818 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Entertainment

7.1

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Food

7.1

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
Southwest
8.0
Very good
4,275 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Entertainment

7.1

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Food

7.1

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
Delta
8.0
Very good
7,899 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Entertainment

7.1

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Food

7.1

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
Hawaiian Airlines
7.9
Good
2,344 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Entertainment

7.1

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Food

7.1

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
United Airlines
7.4
Good
8,614 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Entertainment

7.1

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Food

7.1

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot

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 156 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $59. Users have also found prices from $89 and $98 on Hawaiian Airlines and Alaska Airlines, 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 Boise Air Term. Gowen Fld - Ontario or Eugene - 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 British Airways (100%), Horizon Air (91%) or Hawaiian Airlines (91%) 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 $44. On average you can expect to pay $236. The most popular route, (Portland - Ontario), can usually be booked for $120.

  • 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 $326). 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 8 airlines flying from Oregon to Ontario

Discover the top 8 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 March 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$54Average$127FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$68Average$120FlexibilityNo cancel feeOn-time65%
DeltaCheapest$138Average$356FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$156Average$336FlexibilityNo cancel feeOn-time75%
Hawaiian AirlinesCheapest$164Average$329FlexibilityNo cancel feeOn-time85%
United AirlinesCheapest$171Average$373FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$188Average$361FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$216Average$399FlexibilityNo cancel feeOn-time71%
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