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$71+ 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 4/21. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — ONT
Apr 12 — Apr 191
Sun 4/12
Sun 4/19
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 March 13, 2026.

This Alaska Airlines deal was found by Cheapflights users on 3/9. 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.
Sat 4/184:40 pm
BOI
-
ONT
Nonstop2h 05m
Alaska Airlines
Tue 4/216:25 pm
ONT
-
BOI
Nonstop2h 01m
Alaska Airlines
Deal found 3/9$137
This CheapOair deal was found by Cheapflights users on 3/10. 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.
Sat 4/184:40 pm
BOI
-
ONT
Nonstop2h 05m
Alaska Airlines
Wed 4/222:59 pm
ONT
-
BOI
Nonstop2h 00m
Alaska Airlines
Deal found 3/10$147
This Alaska Airlines deal was found by Cheapflights users on 3/9. 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.
Sat 4/259:30 pm
PDX
-
ONT
Nonstop2h 18m
Alaska Airlines
Wed 4/297:00 am
ONT
-
PDX
Nonstop2h 24m
Alaska Airlines
Deal found 3/9$157
This Southwest deal was found by Cheapflights users on 3/10. 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.
Tue 4/75:15 pm
BOI
-
ONT
1 stop5h 55m
Southwest
Tue 4/145:20 pm
ONT
-
BOI
1 stop5h 00m
Southwest
Deal found 3/10$157
This Frontier deal was found by Cheapflights users on 3/9. 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 4/2011:48 am
PDX
-
ONT
1 stop12h 07m
Frontier
Mon 4/2712:59 am
ONT
-
PDX
1 stop10h 53m
Frontier
Deal found 3/9$160
This SmartFares deal was found by Cheapflights users on 3/11. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/239:30 pm
PDX
-
ONT
Nonstop2h 18m
Alaska Airlines
Sun 4/267:00 am
ONT
-
PDX
Nonstop2h 24m
Alaska Airlines
Deal found 3/11$165
This Alaska Airlines deal was found by Cheapflights users on 3/9. 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.
Fri 4/249:30 pm
PDX
-
ONT
Nonstop2h 18m
Alaska Airlines
Sat 4/257:00 am
ONT
-
PDX
Nonstop2h 24m
Alaska Airlines
Deal found 3/9$167
This CheapOair deal was found by Cheapflights users on 3/9. 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 4/174:40 pm
BOI
-
ONT
Nonstop2h 05m
Alaska Airlines
Wed 4/222:59 pm
ONT
-
BOI
Nonstop2h 00m
Alaska Airlines
Deal found 3/9$167
This Kiwi.com deal was found by Cheapflights users on 3/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/3012:52 pm
PDX
-
ONT
1 stop24h 36m
Frontier
Sun 4/56:20 am
ONT
-
PDX
1 stop28h 43m
Frontier
Deal found 3/10$170
This CheapOair deal was found by Cheapflights users on 3/9. 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 4/141:48 pm
PDX
-
ONT
1 stop10h 07m
Frontier
Fri 4/175:33 pm
ONT
-
PDX
1 stop18h 09m
Frontier
Deal found 3/9$171
This Southwest deal was found by Cheapflights users on 3/10. 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.
Tue 3/316:30 am
PDX
-
ONT
1 stop3h 55m
Southwest
Sat 4/46:35 pm
ONT
-
PDX
1 stop3h 50m
Southwest
Deal found 3/10$172
This Southwest deal was found by Cheapflights users on 3/10. 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 5/66:40 am
PDX
-
ONT
1 stop8h 30m
Southwest
Sun 5/106:25 pm
ONT
-
PDX
1 stop5h 50m
Southwest
Deal found 3/10$174

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 March 13, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$137
(Alaska Airlines)

One-way from

$71
(Kiwi.com)

Popular in

March

Cheapest in

September

Average price

$258

Good round-trip deal

$157 or less

Good one-way deal

$153 or less
Provider with most accurate pricing for Portland-Los Angeles Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Los Angeles 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. 10% potential increase in price ($25 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 13, 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

PortlandOntario

PDX - ONT

PDXONT

Portland

Wed 4/15

5:58 pm-8:23 pm

Nonstop2h 25m

Ontario

Sat 4/18

7:00 am-9:28 am

Nonstop2h 28m

$177

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Sun 4/5

6:35 pm-12:10 am

1 stop6h 35m

Ontario

Tue 4/7

5:20 pm-11:20 pm

1 stop5h 00m

$177
Quickest round-trip

PortlandOntario

PDX - ONT

PDXONT

Portland

Mon 4/20

5:58 pm-8:23 pm

Nonstop2h 25m

Ontario

Sun 4/26

7:00 am-9:24 am

Nonstop2h 24m

$177

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Mon 4/6

6:25 am-10:35 am

1 stop5h 10m

Ontario

Wed 4/8

3:45 pm-11:30 pm

1 stop6h 45m

$177

PortlandOntario

PDX - ONT

PDXONT

Portland

Thu 4/16

5:00 am-10:55 am

1 stop5h 55m

Ontario

Thu 5/7

4:25 pm-10:10 pm

1 stop5h 45m

$197

PortlandOntario

PDX - ONT

PDXONT

Portland

Thu 4/23

6:00 am-12:10 pm

1 stop6h 10m

Ontario

Mon 4/27

6:00 pm-12:55 am

1 stop6h 55m

$197

RedmondOntario

RDM - ONT

RDMONT

Bend/Redmond

Sat 5/2

6:00 am-9:45 am

1 stop27h 45m

Ontario

Tue 5/5

3:26 pm-12:58 pm

1 stop21h 32m

$205

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Sat 4/18

4:23 pm-8:23 pm

1 stop5h 00m

Ontario

Tue 4/21

6:25 pm-9:26 pm

Nonstop2h 01m

$207

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Fri 5/1

1:15 pm-2:19 pm

Nonstop2h 04m

Ontario

Fri 5/1

7:59 pm-12:35 pm

1 stop15h 36m

$211

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

Fri 5/8

2:57 pm-7:05 pm

1 stop5h 08m

Ontario

Mon 5/11

3:26 pm-11:02 pm

1 stop6h 36m

$217

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/11

Showing 1-10 of 60 resultsSorted by cheapest first
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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, October is the cheapest month in which you can book a flight from Oregon to Ontario (average of $50). Flying from Oregon to Ontario in November is currently the most expensive (average of $107). 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 13, 2026.

It’s typically best to fly out from Oregon to Ontario in the morning. Doing so could potentially save you 41% on the flight price compared to flying in the afternoon, which is usually more expensive.

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 February 21, 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.

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 13, 2026.

The most flights from USOR to ONT are scheduled on a Friday (7 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 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 32 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 25m. The time it takes to get you to your destination can typically vary by up to 4h 10m. There are 839 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 $46. Users have also found prices from $78 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 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 Horizon Air (89%), British Airways (79%) or Alaska Airlines (77%) 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 $98. On average you can expect to pay $420. The most popular route, (Portland - Ontario), can usually be booked for $157.

  • 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, October is the cheapest month in which you can book a flight from Oregon to Ontario (average of $50). Flying from Oregon to Ontario in November is currently the most expensive (average of $107). 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

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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 March 13, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$52Average$146FlexibilityNo cancel feeOn-time62%
DeltaCheapest$83Average$239FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$88Average$218FlexibilityNo cancel feeOn-time85%
United AirlinesCheapest$142Average$312FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$157Average$350FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$166Average$297FlexibilityNo cancel feeOn-time63%

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