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$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 5/31. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — ONT
may. 6 — may. 131
mar. 5/6
mar. 5/13
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 mayo 1, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$115
(Cheapflightsfares)

One-way from

$88
(Alaska Airlines)

Popular in

November

Cheapest in

January

Average price

$192

Good round-trip deal

$168 or less

Good one-way deal

$97 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. 8% potential increase in price ($18 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 May 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 mayo 1, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 4/30. 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.
jue. 6/1211:13 amPDX - ONT
Nonstop2h 22mFrontier
dom. 6/152:30 pmONT - PDX
Nonstop2h 25mFrontier
Deal found 4/30$115
This Orbitz deal was found by Cheapflights users on 4/28. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 5/209:41 pmPDX - ONT
Nonstop2h 16mMultiple Airlines
jue. 5/222:19 pmONT - PDX
Nonstop2h 31mMultiple Airlines
Deal found 4/28$132
This Alaska Airlines deal was found by Cheapflights users on 4/29. 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.
sáb. 5/312:50 pmPDX - ONT
Nonstop2h 16mAlaska Airlines
mar. 6/35:55 pmONT - PDX
Nonstop2h 31mAlaska Airlines
Deal found 4/29$157
This Delta deal was found by Cheapflights users on 4/29. 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.
mié. 5/215:35 amPDX - ONT
1 stop5h 29mDelta
mar. 5/2711:44 amONT - PDX
1 stop5h 15mDelta
Deal found 4/29$177
This Delta deal was found by Cheapflights users on 4/30. 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.
sáb. 5/245:10 pmMFR - ONT
1 stop5h 25mDelta
dom. 5/256:00 amONT - MFR
1 stop4h 57mDelta
Deal found 4/30$200
This Hawaiian Airlines deal was found by Cheapflights users on 4/30. 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.
mié. 5/281:25 pmPDX - ONT
1 stop5h 00mHawaiian Airlines
lun. 6/26:00 amONT - PDX
1 stop4h 53mHawaiian Airlines
Deal found 4/30$206
This Frontier deal was found by Cheapflights users on 4/29. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 5/152:57 pmBOI - ONT
1 stop10h 02mFrontier
lun. 5/1912:59 amONT - BOI
1 stop11h 38mFrontier
Deal found 4/29$208
This Alaska Airlines deal was found by Cheapflights users on 4/29. 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.
mar. 6/35:39 pmBOI - ONT
1 stop6h 07mAlaska Airlines
mar. 6/104:45 pmONT - BOI
1 stop4h 57mAlaska Airlines
Deal found 4/29$218
This Delta deal was found by Cheapflights users on 4/29. 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.
mar. 6/312:50 pmBOI - ONT
1 stop4h 27mDelta
mié. 6/115:50 pmONT - BOI
1 stop5h 09mDelta
Deal found 4/29$219
This United Airlines deal was found by Cheapflights users on 4/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 5/152:05 pmMFR - ONT
1 stop6h 29mUnited Airlines
dom. 5/186:00 amONT - MFR
1 stop6h 01mUnited Airlines
Deal found 4/30$220
This Hawaiian Airlines deal was found by Cheapflights users on 4/30. 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.
mié. 5/141:30 pmMFR - ONT
1 stop6h 59mHawaiian Airlines
vie. 5/167:20 pmONT - MFR
1 stop4h 39mHawaiian Airlines
Deal found 4/30$228
This Alaska Airlines deal was found by Cheapflights users on 4/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/149:00 amRDM - ONT
1 stop6h 12mAlaska Airlines
mar. 10/146:00 pmONT - RDM
1 stop4h 28mAlaska Airlines
Deal found 4/30$231

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 mayo 1, 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

jue. 6/12

11:13 am-1:35 pm

Nonstop2h 22m

Ontario

dom. 6/15

2:30 pm-4:55 pm

Nonstop2h 25m

$115

PortlandOntario

PDX - ONT

PDXONT

Portland

mar. 5/20

9:41 pm-11:57 pm

Nonstop2h 16m

Ontario

jue. 5/22

2:19 pm-4:50 pm

Nonstop2h 31m

$132

PortlandOntario

PDX - ONT

PDXONT

Portland

sáb. 5/31

2:50 pm-5:06 pm

Nonstop2h 16m

Ontario

mar. 6/3

5:55 pm-8:26 pm

Nonstop2h 31m

$157

PortlandOntario

PDX - ONT

PDXONT

Portland

sáb. 5/24

5:40 pm-10:35 pm

1 stop4h 55m

Ontario

dom. 5/25

6:00 am-10:45 am

1 stop4h 45m

$187

MedfordOntario

MFR - ONT

MFRONT

Medford

sáb. 5/24

5:10 pm-10:35 pm

1 stop5h 25m

Ontario

dom. 5/25

6:00 am-10:57 am

1 stop4h 57m

$200

PortlandOntario

PDX - ONT

PDXONT

Portland

mié. 5/28

1:25 pm-6:25 pm

1 stop5h 00m

Ontario

lun. 6/2

6:00 am-10:53 am

1 stop4h 53m

$206

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

jue. 5/15

2:57 pm-11:59 pm

1 stop10h 02m

Ontario

lun. 5/19

12:59 am-1:37 pm

1 stop11h 38m

$208

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

mar. 6/3

5:39 pm-10:46 pm

1 stop6h 07m

Ontario

mar. 6/10

4:45 pm-10:42 pm

1 stop4h 57m

$218

BoiseOntario

BOI - ONT

BOIONT

Boise Air Term. Gowen Fld

mar. 6/3

12:50 pm-4:17 pm

1 stop4h 27m

Ontario

mié. 6/11

5:50 pm-11:59 pm

1 stop5h 09m

$219

MedfordOntario

MFR - ONT

MFRONT

Medford

jue. 5/15

2:05 pm-8:34 pm

1 stop6h 29m

Ontario

dom. 5/18

6:00 am-12:01 pm

1 stop6h 01m

$220

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

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 $328). 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 mayo 1, 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 mayo 1, 2025.

The most flights from USOR to ONT are scheduled on a Tuesday (8 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (3 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 mayo 1, 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
9,968 reviews

Food

7.1

Boarding

8.2

Crew

8.5

Entertainment

7.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
9,968 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Food

7.1

Boarding

8.2

Crew

8.5

Entertainment

7.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,294 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Food

7.1

Boarding

8.2

Crew

8.5

Entertainment

7.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,934 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Food

7.1

Boarding

8.2

Crew

8.5

Entertainment

7.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,408 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Food

7.1

Boarding

8.2

Crew

8.5

Entertainment

7.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,696 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Food

7.1

Boarding

8.2

Crew

8.5

Entertainment

7.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 149 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 Alaska Airlines. According to our data, you can fly for as low as $88. Users have also found prices from $89 and $95 on Hawaiian Airlines and Frontier, 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 (97%), Horizon Air (94%) or Alaska Airlines (92%) 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 $39. On average you can expect to pay $274. The most popular route, (Portland - Ontario), can usually be booked for $76.

  • 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 $328). 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 mayo 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$58Average$131FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$68Average$120FlexibilityNo cancel feeOn-time65%
DeltaCheapest$93Average$345FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$108Average$329FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$156Average$339FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$171Average$371FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$192Average$335FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$216Average$399FlexibilityNo cancel feeOn-time71%

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