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Ontario

$88+ 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 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — ONT
Jul 15 — Jul 221
Wed 7/15
Wed 7/22
1 adult, Economy
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Cheap 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 June 15, 2026.

This CheapOair deal was found by Cheapflights users on 6/14. 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.
Tue 9/83:02 pm
BOI
-
ONT
Nonstop2h 08m
Alaska Airlines
Sat 9/124:50 pm
ONT
-
BOI
Nonstop1h 55m
Alaska Airlines
Deal found 6/14$177
This Priceline deal was found by Cheapflights users on 6/14. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/293:02 pm
BOI
-
ONT
Nonstop2h 08m
Alaska Airlines
Fri 10/94:42 pm
ONT
-
BOI
Nonstop2h 00m
Alaska Airlines
Deal found 6/14$187
This Priceline deal was found by Cheapflights users on 6/10. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/72:51 pm
BOI
-
ONT
Nonstop2h 11m
Alaska Airlines
Wed 10/144:42 pm
ONT
-
BOI
Nonstop2h 00m
Alaska Airlines
Deal found 6/10$197
This Delta deal was found by Cheapflights users on 6/10. 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 8/256:00 am
BOI
-
ONT
1 stop3h 52m
Delta
Tue 9/15:05 pm
ONT
-
BOI
1 stop3h 54m
Delta
Deal found 6/10$203
This Southwest deal was found by Cheapflights users on 6/11. 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 9/227:40 am
BOI
-
ONT
1 stop3h 35m
Southwest
Tue 9/293:35 pm
ONT
-
BOI
1 stop6h 45m
Southwest
Deal found 6/11$204
This Delta deal was found by Cheapflights users on 6/11. 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 9/306:40 pm
BOI
-
ONT
1 stop5h 57m
Delta
Sat 10/31:00 pm
ONT
-
BOI
1 stop4h 43m
Delta
Deal found 6/11$205
This Southwest deal was found by Cheapflights users on 6/10. 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 10/712:50 pm
BOI
-
ONT
1 stop6h 40m
Southwest
Tue 10/135:25 pm
ONT
-
BOI
1 stop3h 55m
Southwest
Deal found 6/10$216
This CheapOair deal was found by Cheapflights users on 6/10. 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 10/152:51 pm
BOI
-
ONT
Nonstop2h 11m
Alaska Airlines
Mon 10/194:42 pm
ONT
-
BOI
Nonstop2h 00m
Alaska Airlines
Deal found 6/10$217
This Southwest deal was found by Cheapflights users on 6/10. 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 10/711:35 am
BOI
-
ONT
1 stop5h 25m
Southwest
Wed 10/148:15 am
ONT
-
BOI
1 stop4h 00m
Southwest
Deal found 6/10$220
This Frontier deal was found by Cheapflights users on 6/11. 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 8/45:16 pm
PDX
-
ONT
1 stop6h 34m
Frontier
Sat 8/156:00 am
ONT
-
PDX
1 stop10h 51m
Frontier
Deal found 6/11$234
This CheapOair deal was found by Cheapflights users on 6/12. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/35:49 pm
PDX
-
ONT
1 stop21h 25m
Frontier
Wed 8/56:00 am
ONT
-
PDX
1 stop10h 36m
Frontier
Deal found 6/12$235
This Booking.com deal was found by Cheapflights users on 6/11. 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.
Sat 8/112:20 pm
PDX
-
ONT
1 stop11h 30m
Frontier
Tue 8/46:00 am
ONT
-
PDX
1 stop10h 31m
Frontier
Deal found 6/11$236

Find flight deals from Oregon to Ontario

Keep the following information in mind while searching for Oregon to Ontario flight deals. Data was last updated June 15, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$177
(CheapOair)

One-way from

$88
(Delta)

Popular in

June

Cheapest in

January

Average price

$298

Good round-trip deal

$307 or less

Good one-way deal

$183 or less
Provider with most accurate pricing for Portland-Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Los Angeles flights.
Search Deals
From Oregon to Ontario
Search Deals
One-way flight from Oregon to Ontario
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($22 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals
Price to beat on a round-trip flight from Oregon to Ontario.
Search Deals
Price to beat on a one-way flight from Oregon to Ontario.
Search Deals

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 June 15, 2026.
Use the filters below to find and compare flights from Oregon to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Fri 11/6

5:45 pm-11:48 pm

1 stop7h 03m

Ontario

Sat 11/14

6:00 am-12:17 pm

1 stop5h 17m

$222

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Tue 9/29

3:02 pm-4:10 pm

Nonstop2h 08m

Ontario

Wed 9/30

4:50 pm-7:45 pm

Nonstop1h 55m

$237

PortlandOntario

PDX - ONT

PDXONT

Portland

Sat 7/4

6:20 am-10:05 am

1 stop3h 45m

Ontario

Tue 7/7

6:25 pm-10:30 pm

1 stop4h 05m

$242

PortlandOntario

PDX - ONT

PDXONT

Portland

Fri 9/11

10:15 am-4:14 pm

1 stop5h 59m

Ontario

Sun 9/13

5:05 pm-11:41 pm

1 stop6h 36m

$242

PortlandOntario

PDX - ONT

PDXONT

Portland

Mon 8/3

4:25 pm-11:35 pm

1 stop7h 10m

Ontario

Fri 8/7

2:40 pm-7:15 pm

1 stop4h 35m

$242

PortlandOntario

PDX - ONT

PDXONT

Portland

Thu 7/30

10:00 am-1:25 pm

1 stop3h 25m

Ontario

Sun 8/2

4:35 pm-9:10 pm

1 stop4h 35m

$242

PortlandOntario

PDX - ONT

PDXONT

Portland

Sat 7/11

3:30 pm-10:52 pm

1 stop7h 22m

Ontario

Sat 7/18

5:10 pm-10:38 pm

1 stop5h 28m

$247

PortlandOntario

PDX - ONT

PDXONT

Portland

Fri 7/17

5:30 am-10:30 am

1 stop5h 00m

Ontario

Sun 7/19

5:40 am-9:20 am

1 stop3h 40m

$247

PortlandOntario

PDX - ONT

PDXONT

Portland

Mon 11/23

7:14 pm-11:48 pm

1 stop4h 34m

Ontario

Fri 11/27

5:05 pm-11:51 pm

1 stop6h 46m

$247

PortlandOntario

PDX - ONT

PDXONT

Portland

Mon 7/13

5:50 pm-10:52 pm

1 stop5h 02m

Ontario

Sat 7/18

5:10 pm-10:38 pm

1 stop5h 28m

$247

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 60 resultsSorted by cheapest first
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6

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, November is the cheapest month in which you can book a flight from Oregon to Ontario (average of $34). Flying from Oregon to Ontario in May is currently the most expensive (average of $157). 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 June 15, 2026.

It’s typically best to fly out from Oregon to Ontario in the evening. Doing so could potentially save you 36% on the flight price compared to flying in the afternoon, which is usually more expensive.

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 June 15, 2026.

The most flights from USOR to ONT are scheduled on a Monday (5 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (4 on average).

How much does it cost to fly round-trip from Oregon to Ontario?

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

The best time to book flights from Oregon to Ontario is 46 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Use this chart to determine the cheapest time to fly round-trip from Oregon to Ontario. Price data was last updated on June 8, 2026.

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

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 20 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 Alaska Airlines, Southwest, and Delta fly from Oregon to Ontario in about 2h 08m. The time it takes to get you to your destination can typically vary by up to 3h 51m. There are 661 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 Frontier. According to our data, you can fly for as low as $56. Users have also found prices from $75 and $88 on Southwest and United 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 Medford - 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 SkyWest Airlines (100%), Hawaiian Airlines (87%) or British Airways (78%) 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 $158. On average you can expect to pay $315. The most popular route, (Portland - Ontario), can usually be booked for $228.

  • 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, November is the cheapest month in which you can book a flight from Oregon to Ontario (average of $34). Flying from Oregon to Ontario in May is currently the most expensive (average of $157). 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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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 June 15, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$50Average$146FlexibilityNo cancel feeOn-time62%
DeltaCheapest$83Average$293FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$88Average$218FlexibilityNo cancel feeOn-time85%
United AirlinesCheapest$142Average$313FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$157Average$377FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$166Average$303FlexibilityNo cancel feeOn-time63%

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