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$84+ 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 8/11. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — ONT
jul. 6 — jul. 131
lun. 7/6
lun. 7/13
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 junio 6, 2026.

This Orbitz deal was found by Cheapflights users on 6/1. 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.
mié. 10/282:51 pm
BOI
-
ONT
Nonstop2h 11m
Alaska Airlines
sáb. 10/314:42 pm
ONT
-
BOI
Nonstop2h 00m
Alaska Airlines
Deal found 6/1$177
This CheapOair deal was found by Cheapflights users on 6/5. 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.
jue. 9/33:02 pm
BOI
-
ONT
Nonstop2h 08m
Alaska Airlines
mar. 9/84:50 pm
ONT
-
BOI
Nonstop1h 55m
Alaska Airlines
Deal found 6/5$187
This Alaska Airlines deal was found by Cheapflights users on 6/1. 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. 9/123:02 pm
BOI
-
ONT
Nonstop2h 08m
Alaska Airlines
mié. 9/164:50 pm
ONT
-
BOI
Nonstop1h 55m
Alaska Airlines
Deal found 6/1$197
This Trip.com deal was found by Cheapflights users on 6/2. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/113:02 pm
BOI
-
ONT
Nonstop2h 08m
Alaska Airlines
dom. 9/134:50 pm
ONT
-
BOI
Nonstop1h 55m
Alaska Airlines
Deal found 6/2$203
This Delta deal was found by Cheapflights users on 6/1. 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.
jue. 9/105:45 pm
BOI
-
ONT
1 stop5h 59m
Delta
sáb. 9/191:00 pm
ONT
-
BOI
1 stop4h 43m
Delta
Deal found 6/1$207
This Kiwi.com deal was found by Cheapflights users on 6/4. 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.
lun. 9/143:40 pm
MFR
-
ONT
1 stop24h 30m
Multiple Airlines
jue. 9/179:12 pm
ONT
-
MFR
1 stop11h 20m
Multiple Airlines
Deal found 6/4$216
This Delta deal was found by Cheapflights users on 6/4. 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. 10/171:15 pm
BOI
-
ONT
1 stop3h 57m
Delta
dom. 11/16:00 am
ONT
-
BOI
1 stop5h 17m
Delta
Deal found 6/4$217
This Alaska Airlines deal was found by Cheapflights users on 6/1. 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.
jue. 9/105:52 pm
BOI
-
ONT
1 stop6h 32m
Alaska Airlines
mar. 9/224:50 pm
ONT
-
BOI
Nonstop1h 55m
Alaska Airlines
Deal found 6/1$227
This Southwest deal was found by Cheapflights users on 6/1. 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.
jue. 9/35:45 am
PDX
-
ONT
1 stop7h 40m
Southwest
lun. 9/76:30 am
ONT
-
PDX
1 stop3h 45m
Southwest
Deal found 6/1$228
This Frontier deal was found by Cheapflights users on 6/2. 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.
mié. 8/125:21 pm
PDX
-
ONT
1 stop6h 29m
Frontier
mar. 8/186:00 am
ONT
-
PDX
1 stop10h 57m
Frontier
Deal found 6/2$230
This Booking.com deal was found by Cheapflights users on 6/1. 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.
mié. 7/15:20 pm
PDX
-
ONT
1 stop16h 45m
Frontier
mié. 7/86:00 am
ONT
-
PDX
1 stop10h 36m
Frontier
Deal found 6/1$232
This Southwest deal was found by Cheapflights users on 6/1. 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.
vie. 9/41:40 pm
PDX
-
ONT
1 stop8h 30m
Southwest
sáb. 9/125:40 am
ONT
-
PDX
2 stops7h 10m
Southwest
Deal found 6/1$233

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 junio 6, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$177
(Orbitz)

One-way from

$84
(United Airlines)

Popular in

March

Cheapest in

January

Average price

$257

Good round-trip deal

$307 or less

Good one-way deal

$178 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. 13% potential increase in price ($35 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 junio 6, 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

jue. 9/3

3:02 pm-4:10 pm

Nonstop2h 08m

Ontario

dom. 9/6

4:50 pm-7:45 pm

Nonstop1h 55m

$207

PortlandOntario

PDX - ONT

PDXONT

Portland

jue. 7/30

5:15 am-12:12 pm

1 stop6h 57m

Ontario

mar. 8/4

6:00 am-12:07 pm

1 stop6h 07m

$247

PortlandOntario

PDX - ONT

PDXONT

Portland

jue. 7/9

5:15 am-12:12 pm

1 stop6h 57m

Ontario

mié. 7/15

6:00 am-10:20 am

1 stop4h 20m

$253

PortlandOntario

PDX - ONT

PDXONT

Portland

lun. 8/31

5:45 am-12:05 pm

1 stop6h 20m

Ontario

vie. 9/4

12:55 pm-6:05 pm

1 stop5h 10m

$258

PortlandOntario

PDX - ONT

PDXONT

Portland

vie. 7/10

5:50 pm-10:52 pm

1 stop5h 02m

Ontario

lun. 7/27

5:10 pm-11:44 pm

1 stop6h 34m

$259

PortlandOntario

PDX - ONT

PDXONT

Portland

sáb. 7/11

5:54 pm-10:52 pm

1 stop4h 58m

Ontario

lun. 7/27

5:10 pm-11:44 pm

1 stop6h 34m

$259

RedmondOntario

RDM - ONT

RDMONT

Bend/Redmond

jue. 9/10

12:30 pm-5:16 pm

1 stop4h 46m

Ontario

lun. 9/14

6:00 pm-11:08 pm

1 stop5h 08m

$259

RedmondOntario

RDM - ONT

RDMONT

Bend/Redmond

sáb. 8/29

5:10 am-12:05 pm

1 stop6h 55m

Ontario

lun. 8/31

6:20 am-1:12 pm

1 stop6h 52m

$259

RedmondOntario

RDM - ONT

RDMONT

Bend/Redmond

mié. 10/21

12:30 pm-5:17 pm

1 stop4h 47m

Ontario

dom. 10/25

5:50 pm-10:46 pm

1 stop4h 56m

$259

RedmondOntario

RDM - ONT

RDMONT

Bend/Redmond

mié. 9/2

5:10 am-12:05 pm

1 stop6h 55m

Ontario

mar. 10/20

5:05 pm-11:40 pm

1 stop6h 35m

$269

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/1

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, 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 junio 6, 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 junio 6, 2026.

The most flights from USOR to ONT are scheduled on a Thursday (5 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (1 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 May 30, 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 25 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, United Airlines, 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 4h 49m. 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 $57. 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 $148. On average you can expect to pay $328. The most popular route, (Portland - Ontario), can usually be booked for $239.

  • 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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See prices for flight routes from nearby airports that may be better suited for you.
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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 junio 6, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$51Average$148FlexibilityNo 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$379FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$166Average$313FlexibilityNo cancel feeOn-time63%

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