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$54+ 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 6/5. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — ONT
febr. 25 — març 41
dt. 2/25
dt. 3/4
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 febrer 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$143
(Frontier)

One-way from

$54
(Cheapflightsfares)

Popular in

March

Cheapest in

January

Average price

$168

Good round-trip deal

$167 or less

Good one-way deal

$88 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
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($7 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 February 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 febrer 20, 2025.

This Frontier deal was found by Cheapflights users on 2/20. 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.
dv. 6/62:54 pmPDX - ONT
Nonstop2h 21mFrontier
dl. 6/911:28 amONT - PDX
Nonstop2h 26mFrontier
Deal found 2/20$143
This lastminute.com deal was found by Cheapflights users on 2/20. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dl. 4/77:05 amPDX - ONT
Nonstop2h 23mHawaiian Airlines
dt. 4/1510:18 amONT - PDX
Nonstop2h 27mHawaiian Airlines
Deal found 2/20$152
This Alaska Airlines deal was found by Cheapflights users on 2/19. 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.
dv. 4/49:41 pmPDX - ONT
Nonstop2h 18mAlaska Airlines
dt. 4/87:00 amONT - PDX
Nonstop2h 24mAlaska Airlines
Deal found 2/19$167
This Travelocity deal was found by Cheapflights users on 2/20. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dt. 5/279:41 pmPDX - ONT
Nonstop2h 16mMultiple Airlines
dv. 5/3011:28 amONT - PDX
Nonstop2h 26mMultiple Airlines
Deal found 2/20$168
This Southwest deal was found by Cheapflights users on 2/20. 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.
dt. 3/184:30 pmPDX - ONT
1 stop3h 30mSouthwest
dc. 3/192:00 pmONT - PDX
2 stops7h 40mSouthwest
Deal found 2/20$182
This Delta deal was found by Cheapflights users on 2/20. 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.
dl. 3/105:10 pmPDX - ONT
1 stop5h 12mDelta
dv. 3/215:30 pmONT - PDX
1 stop6h 29mDelta
Deal found 2/20$190
This United Airlines deal was found by Cheapflights users on 2/20. 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.
dv. 5/91:45 pmPDX - ONT
1 stop6h 49mUnited Airlines
ds. 5/103:10 pmONT - PDX
1 stop5h 43mUnited Airlines
Deal found 2/20$198
This Southwest deal was found by Cheapflights users on 2/19. 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.
dj. 5/16:10 amBOI - ONT
1 stop5h 50mSouthwest
dt. 5/66:45 amONT - BOI
1 stop3h 25mSouthwest
Deal found 2/19$212
This Alaska Airlines deal was found by Cheapflights users on 2/19. 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.
dt. 4/16:00 amBOI - ONT
1 stop4h 28mAlaska Airlines
dl. 4/76:00 amONT - BOI
1 stop6h 52mAlaska Airlines
Deal found 2/19$216
This Delta deal was found by Cheapflights users on 2/20. 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.
dc. 3/2610:50 amBOI - ONT
1 stop6h 52mDelta
dt. 4/15:15 pmONT - BOI
1 stop5h 58mDelta
Deal found 2/20$217
This Hawaiian Airlines deal was found by Cheapflights users on 2/18. 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.
dc. 3/123:49 pmMFR - ONT
1 stop5h 38mHawaiian Airlines
dt. 3/186:00 amONT - MFR
1 stop5h 11mHawaiian Airlines
Deal found 2/18$238
This Delta deal was found by Cheapflights users on 2/19. 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.
dt. 5/135:21 pmMFR - ONT
1 stop5h 19mDelta
dt. 5/205:53 pmONT - MFR
1 stop5h 19mDelta
Deal found 2/19$239

Find flights from Oregon to Ontario within your budget

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 febrer 20, 2025.

Fly from

Oregon

Fly to

Ontario

Route

Depart

Return

Price

PortlandOntario

PDX - ONT

PDXONT

Portland

dv. 6/6

2:54 pm-5:15 pm

Nonstop2h 21m

Ontario

dl. 6/9

11:28 am-1:54 pm

Nonstop2h 26m

$143

PortlandOntario

PDX - ONT

PDXONT

Portland

dl. 4/7

7:05 am-9:28 am

Nonstop2h 23m

Ontario

dt. 4/15

10:18 am-12:45 pm

Nonstop2h 27m

$152

PortlandOntario

PDX - ONT

PDXONT

Portland

dv. 4/4

9:41 pm-11:59 pm

Nonstop2h 18m

Ontario

dt. 4/8

7:00 am-9:24 am

Nonstop2h 24m

$167

PortlandOntario

PDX - ONT

PDXONT

Portland

dt. 5/27

9:41 pm-11:57 pm

Nonstop2h 16m

Ontario

dv. 5/30

11:28 am-1:54 pm

Nonstop2h 26m

$168

PortlandOntario

PDX - ONT

PDXONT

Portland

dt. 3/18

4:30 pm-8:00 pm

1 stop3h 30m

Ontario

dc. 3/19

2:00 pm-9:40 pm

2 stops7h 40m

$182

PortlandOntario

PDX - ONT

PDXONT

Portland

dl. 3/10

5:10 pm-10:22 pm

1 stop5h 12m

Ontario

dv. 3/21

5:30 pm-11:59 pm

1 stop6h 29m

$190

PortlandOntario

PDX - ONT

PDXONT

Portland

dv. 5/9

1:45 pm-8:34 pm

1 stop6h 49m

Ontario

ds. 5/10

3:10 pm-8:53 pm

1 stop5h 43m

$198

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

dj. 5/1

6:10 am-11:00 am

1 stop5h 50m

Ontario

dt. 5/6

6:45 am-11:10 am

1 stop3h 25m

$212

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

dt. 4/1

6:00 am-9:28 am

1 stop4h 28m

Ontario

dl. 4/7

6:00 am-1:52 pm

1 stop6h 52m

$216

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

dc. 3/26

10:50 am-4:42 pm

1 stop6h 52m

Ontario

dt. 4/1

5:15 pm-12:13 am

1 stop5h 58m

$217

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 57 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.

Travel insights for flights from Oregon to Ontario

Get recent, data-driven insights about flights from Oregon to Ontario including ideal travel times, pricing trends, and more.

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 $315). 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 febrer 20, 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 febrer 20, 2025.

The most flights from USOR to ONT are scheduled on a Monday (6 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (4 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 febrer 20, 2025.
See what other customers who have flown with Southwest, Alaska Airlines 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.
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Comfort

8.1

Crew

8.7

Overall

8.1

Entertainment

7.6

Boarding

8.2

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

Southwest
8.1
Very good
4,411 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Comfort

8.1

Crew

8.7

Overall

8.1

Entertainment

7.6

Boarding

8.2

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

Alaska Airlines
8.0
Very good
9,692 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Comfort

8.1

Crew

8.7

Overall

8.1

Entertainment

7.6

Boarding

8.2

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

Delta
8.0
Very good
8,220 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Comfort

8.1

Crew

8.7

Overall

8.1

Entertainment

7.6

Boarding

8.2

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

Hawaiian Airlines
7.9
Good
2,317 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Comfort

8.1

Crew

8.7

Overall

8.1

Entertainment

7.6

Boarding

8.2

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

United Airlines
7.4
Good
8,766 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Comfort

8.1

Crew

8.7

Overall

8.1

Entertainment

7.6

Boarding

8.2

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

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 171 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 $54. Users have also found prices from $79 and $82 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 Southwest (100%), Horizon Air (100%) or British Airways (100%) 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 $50. On average you can expect to pay $164. The most popular route, (Portland - Ontario), can usually be booked for $118.

  • 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 $315). 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.

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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 7 airlines flying from Oregon to Ontario

Discover the top 7 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 febrer 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$54Average$125FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$68Average$120FlexibilityNo cancel feeOn-time65%
Alaska AirlinesCheapest$156Average$349FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$171Average$412FlexibilityNo cancel feeOn-time69%
DeltaCheapest$187Average$334FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$192Average$371FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$216Average$369FlexibilityNo cancel feeOn-time71%
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