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$70+ 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 2/4. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PDX
Feb 13 — Feb 201
Fri 2/13
Fri 2/20
1 adult, Economy
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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 January 14, 2026.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$117
(Expedia)

One-way from

$70
(Booking.com)

Popular in

November

Cheapest in

February

Average price

$178

Good round-trip deal

$187 or less

Good one-way deal

$218 or less
Provider with most accurate pricing for Los Angeles-Portland flight deals.
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Provider most trusted by Cheapflights users for Los Angeles-Portland flights.
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From Ontario to Oregon
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One-way flight from Ontario to Oregon
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Highest demand for flights based on searches. 10% potential increase in price ($23 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Price to beat on a round-trip flight from Ontario to Oregon.
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Price to beat on a one-way flight from Ontario to Oregon.
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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 January 14, 2026.

This Expedia deal was found by Cheapflights users on 1/13. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/47:56 pm
ONT
-
BOI
Nonstop2h 01m
Alaska Airlines
Tue 2/246:07 pm
BOI
-
ONT
Nonstop2h 07m
Alaska Airlines
Deal found 1/13$117
This Alaska Airlines deal was found by Cheapflights users on 1/12. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/147:37 pm
ONT
-
BOI
Nonstop1h 59m
Alaska Airlines
Wed 2/186:07 pm
BOI
-
ONT
Nonstop2h 07m
Alaska Airlines
Deal found 1/12$137
This Kiwi.com deal was found by Cheapflights users on 1/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/118:10 am
ONT
-
BOI
1 stop26h 41m
Frontier
Fri 2/1311:56 am
BOI
-
ONT
1 stop13h 03m
Frontier
Deal found 1/12$142
This Alaska Airlines deal was found by Cheapflights users on 1/14. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/117:00 am
ONT
-
PDX
Nonstop2h 33m
Alaska Airlines
Wed 2/189:30 pm
PDX
-
ONT
Nonstop2h 22m
Alaska Airlines
Deal found 1/14$157
This Southwest deal was found by Cheapflights users on 1/12. 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.
Wed 2/186:30 am
ONT
-
BOI
1 stop7h 50m
Southwest
Tue 2/2411:50 am
BOI
-
ONT
1 stop6h 20m
Southwest
Deal found 1/12$157
This CheapOair deal was found by Cheapflights users on 1/13. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/77:35 pm
ONT
-
PDX
1 stop14h 39m
Frontier
Mon 2/99:22 pm
PDX
-
ONT
1 stop16h 30m
Frontier
Deal found 1/13$161
This Southwest deal was found by Cheapflights users on 1/12. 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.
Sat 3/76:10 pm
ONT
-
PDX
2 stops6h 45m
Southwest
Tue 3/105:15 am
PDX
-
ONT
1 stop7h 50m
Southwest
Deal found 1/12$162
This Delta deal was found by Cheapflights users on 1/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/45:10 pm
ONT
-
BOI
1 stop5h 02m
Delta
Sun 2/89:15 am
BOI
-
ONT
1 stop5h 41m
Delta
Deal found 1/14$162
This SmartFares deal was found by Cheapflights users on 1/12. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/147:00 am
ONT
-
PDX
Nonstop2h 28m
Hawaiian Airlines
Sat 2/217:45 am
PDX
-
ONT
Nonstop2h 19m
Hawaiian Airlines
Deal found 1/12$164
This Mytrip deal was found by Cheapflights users on 1/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/226:20 am
ONT
-
BOI
1 stop27h 52m
Frontier
Mon 1/2612:07 pm
BOI
-
ONT
1 stop13h 13m
Frontier
Deal found 1/12$165
This Delta deal was found by Cheapflights users on 1/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/116:00 am
ONT
-
PDX
1 stop6h 32m
Delta
Sun 2/155:45 am
PDX
-
ONT
1 stop6h 22m
Delta
Deal found 1/13$167
This Alaska Airlines deal was found by Cheapflights users on 1/13. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/117:56 pm
ONT
-
BOI
Nonstop2h 01m
Alaska Airlines
Wed 2/186:07 pm
BOI
-
ONT
Nonstop2h 07m
Alaska Airlines
Deal found 1/13$167

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 January 14, 2026.
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

Wed 3/4

7:59 pm-10:58 pm

Nonstop1h 59m

Boise Air Term. Gowen Fld

Wed 4/8

4:40 pm-5:45 pm

Nonstop2h 05m

$137

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Sat 2/14

7:37 pm-10:36 pm

Nonstop1h 59m

Boise Air Term. Gowen Fld

Wed 2/18

6:07 pm-7:14 pm

Nonstop2h 07m

$137

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Fri 3/13

7:37 pm-10:36 pm

Nonstop1h 59m

Boise Air Term. Gowen Fld

Tue 3/17

7:50 am-8:57 am

Nonstop2h 07m

$147

OntarioBoise

ONT - BOI

ONTBOI

Ontario

Wed 2/18

7:59 pm-10:58 pm

Nonstop1h 59m

Boise Air Term. Gowen Fld

Sun 2/22

5:50 pm-6:57 pm

Nonstop2h 07m

$147

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Wed 2/11

5:59 pm-8:26 pm

Nonstop2h 27m

Portland

Tue 2/17

9:30 pm-11:52 pm

Nonstop2h 22m

$157

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Tue 2/17

7:00 am-9:28 am

Nonstop2h 28m

Portland

Mon 2/23

2:50 pm-5:14 pm

Nonstop2h 24m

$157

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 2/21

7:00 am-9:28 am

Nonstop2h 28m

Portland

Thu 2/26

9:30 pm-11:52 pm

Nonstop2h 22m

$157

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Tue 3/10

7:00 am-9:28 am

Nonstop2h 28m

Portland

Sun 3/15

9:30 pm-11:52 pm

Nonstop2h 22m

$157

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Wed 2/18

7:00 am-9:28 am

Nonstop2h 28m

Portland

Tue 2/24

9:30 pm-11:52 pm

Nonstop2h 22m

$157

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Fri 2/6

5:59 pm-8:26 pm

Nonstop2h 27m

Portland

Sun 2/8

2:43 pm-5:03 pm

Nonstop2h 20m

$157

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/13

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, February is the cheapest month in which you can book a flight from Ontario to Oregon (average of $52). Flying from Ontario to Oregon in December is currently the most expensive (average of $98). 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 January 14, 2026.

Unlike in the evening, when flights are generally more expensive, you can save up to 40% 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 January 10, 2026.

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.

Weekly flight availability from Ontario to Oregon

Explore weekly flight availability from Ontario to Oregon. 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 January 14, 2026.

The most flights from ONT to USOR are scheduled on a Wednesday (8 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (4 on average).

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 January 14, 2026.
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
11,708 reviews

Boarding

8.1

Overall

8.0

Food

7.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Georgana,Dec 2025

ORD - PDX

Very cordial grew. Thank you. However, crying baby issues and no ear plugs available.
Alaska Airlines
8.0
Very good
11,708 reviews
Alaska Airlines
8.0
Very good
11,708 reviews

Boarding

8.1

Overall

8.0

Food

7.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Georgana,Dec 2025

ORD - PDX

Very cordial grew. Thank you. However, crying baby issues and no ear plugs available.
Southwest
8.0
Very good
4,258 reviews
Alaska Airlines
8.0
Very good
11,708 reviews

Boarding

8.1

Overall

8.0

Food

7.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Georgana,Dec 2025

ORD - PDX

Very cordial grew. Thank you. However, crying baby issues and no ear plugs available.
Hawaiian Airlines
7.8
Good
2,827 reviews
Alaska Airlines
8.0
Very good
11,708 reviews

Boarding

8.1

Overall

8.0

Food

7.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Georgana,Dec 2025

ORD - PDX

Very cordial grew. Thank you. However, crying baby issues and no ear plugs available.
United Airlines
7.4
Good
9,157 reviews
Alaska Airlines
8.0
Very good
11,708 reviews

Boarding

8.1

Overall

8.0

Food

7.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Georgana,Dec 2025

ORD - PDX

Very cordial grew. Thank you. However, crying baby issues and no ear plugs available.
Frontier
5.7
Fair
3,056 reviews
Alaska Airlines
8.0
Very good
11,708 reviews

Boarding

8.1

Overall

8.0

Food

7.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Georgana,Dec 2025

ORD - PDX

Very cordial grew. Thank you. However, crying baby issues and no ear plugs available.

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 49 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 1h 59m. Fly via Alaska Airlines or Delta to get the fastest option. Ontario and Oregon are separated by a distance of 661 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?

    $38 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Southwest and Alaska Airlines, with prices starting from $78 and $88, 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 Frontier (92%), British Airways (91%) or Horizon Air (90%) 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 $323 for a flight from Ontario to Oregon. The cheapest flight overall is $108 while the most popular route, (Ontario - Portland) is currently priced at $150.

  • 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, February is the cheapest month in which you can book a flight from Ontario to Oregon (average of $52). Flying from Ontario to Oregon in December is currently the most expensive (average of $98). 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 January 14, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$78Average$159FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$89Average$273FlexibilityNo cancel feeOn-time85%
DeltaCheapest$142Average$302FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$153Average$343FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$158Average$315FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$165Average$342FlexibilityNo cancel feeOn-time75%

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