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$39+ Cheap flights from Portland to Ontario (PDX - 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 2/7. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — ONT
Jan 28 — Feb 41
Tue 1/28
Tue 2/4
1 adult, Economy
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The best prices from Portland to Ontario are usually found in September or May, booked 89 days in advance, depart on a Thursday or Monday and return on a Tuesday

Cheap flight deals from Portland to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 23, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$114
(Frontier)

One-way from

$39
(Cheapflightsfares)

Popular in

March

Cheapest in

September

Average price

$273

Good round-trip deal

$156 or less

Good one-way deal

$99 or less
Provider with most accurate pricing for Portland-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Ontario flights.
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From Portland to Ontario
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One-way flight from Portland to Ontario
Search Deals
Highest demand for flights based on searches. 24% potential increase in price ($63 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in January 2025
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Price to beat on a round-trip flight from Portland to Ontario.
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Price to beat on a one-way flight from Portland to Ontario.
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Find flight deals from Portland to Ontario

Cheapest flights from Portland to Ontario
Explore the most affordable flight options available from Portland to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 23, 2025.

This Frontier deal was found by Cheapflights users on 1/22. 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 2/310:35 amPDX - ONT
Nonstop2h 21mFrontier
Thu 2/134:19 pmONT - PDX
1 stop8h 18mFrontier
Deal found 1/22$114
This Orbitz deal was found by Cheapflights users on 1/23. 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.
Mon 2/310:35 amPDX - ONT
Nonstop2h 21mMultiple Airlines
Thu 2/67:00 amONT - PDX
Nonstop2h 33mMultiple Airlines
Deal found 1/23$153
This Alaska Airlines deal was found by Cheapflights users on 1/22. 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 4/129:41 pmPDX - ONT
Nonstop2h 18mAlaska Airlines
Sat 4/197:00 amONT - PDX
Nonstop2h 24mAlaska Airlines
Deal found 1/22$157
This Southwest deal was found by Cheapflights users on 1/22. 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 2/227:25 amPDX - ONT
1 stop5h 25mSouthwest
Sat 2/224:30 pmONT - PDX
1 stop7h 05mSouthwest
Deal found 1/22$171
This Delta deal was found by Cheapflights users on 1/22. 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 1/295:15 pmPDX - ONT
1 stop5h 17mDelta
Fri 1/314:05 pmONT - PDX
1 stop7h 53mDelta
Deal found 1/22$247
This United Airlines deal was found by Cheapflights users on 1/22. 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.
Mon 2/31:38 pmPDX - ONT
1 stop4h 19mUnited Airlines
Wed 2/56:15 amONT - PDX
1 stop6h 15mUnited Airlines
Deal found 1/22$293

Find flights from Portland to Ontario within your budget

Customize your flight search to find flights from Portland 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 January 23, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

PortlandOntario

PDX - ONT

PDXONT

Portland

Mon 2/3

10:35 am-12:56 pm

Nonstop2h 21m

Ontario

Thu 2/13

4:19 pm-12:37 am

1 stop8h 18m

$114

PortlandOntario

PDX - ONT

PDXONT

Portland

Fri 2/7

10:35 am-12:56 pm

Nonstop2h 21m

Ontario

Sun 2/9

7:00 am-9:33 am

Nonstop2h 33m

$133

PortlandOntario

PDX - ONT

PDXONT

Portland

Sat 4/12

9:41 pm-11:59 pm

Nonstop2h 18m

Ontario

Wed 4/16

6:55 am-9:19 am

Nonstop2h 24m

$157

PortlandOntario

PDX - ONT

PDXONT

Portland

Sat 2/22

7:25 am-12:50 pm

1 stop5h 25m

Ontario

Sat 2/22

4:30 pm-11:35 pm

1 stop7h 05m

$171

PortlandOntario

PDX - ONT

PDXONT

Portland

Mon 4/14

6:00 am-11:05 am

1 stop5h 05m

Ontario

Tue 4/15

3:55 pm-8:09 pm

1 stop4h 14m

$247

PortlandOntario

PDX - ONT

PDXONT

Portland

Sat 2/8

5:00 am-11:58 am

1 stop6h 58m

Ontario

Sun 2/9

10:00 am-4:55 pm

1 stop6h 55m

$264

PortlandOntario

PDX - ONT

PDXONT

Portland

Wed 3/19

5:26 pm-11:56 pm

1 stop6h 30m

Ontario

Mon 3/24

5:15 pm-11:44 pm

1 stop6h 29m

$298

PortlandOntario

PDX - ONT

PDXONT

Portland

Fri 2/7

10:35 am-12:56 pm

Nonstop2h 21m

$39

PortlandOntario

PDX - ONT

PDXONT

Portland

Wed 4/16

9:41 pm-11:59 pm

Nonstop2h 18m

$79

PortlandOntario

PDX - ONT

PDXONT

Portland

Tue 2/25

5:13 am-12:07 pm

1 stop6h 54m

$95

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/22

Showing 1-10 of 13 results
1
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Compare providers for flights from Portland to Ontario

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Portland to Ontario in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*1 star
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy2 starsTrust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
FlightnetworkPrice Accuracy2 starsTrust Score*1 star
FlightnetworkPrice Accuracy-Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Portland-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Portland-Ontario flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Portland-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Portland to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Portland 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 Portland to Ontario

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

How far ahead should I book a flight from Portland to Ontario?

Use this chart to determine the optimal time to book a round-trip flight from Portland to Ontario. Price data was last updated on January 17, 2025.

The price you pay for your flight from Portland to Ontario may vary depending on when you book. For the best chance of a lower fare, look to book 73 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Portland to Ontario?

Currently, August is the cheapest month in which you can book a flight from Portland to Ontario (average of $246). Flying from Portland to Ontario in March is currently the most expensive (average of $310). 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 PDX to ONT?

Find hourly flight availability from Portland 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 January 23, 2025.

When flying from Portland to Ontario, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 24% versus a flight in the evening.

What is the cheapest day to fly from Portland to Ontario?

Use this chart to determine the cheapest time to fly round-trip from Portland to Ontario. Price data was last updated on January 21, 2025.

Travelers seeking maximum savings on their Portland to Ontario flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Wednesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Portland to Ontario

Explore weekly flight availability from Portland 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 January 23, 2025.

The most flights from PDX 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 (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 January 23, 2025.
See what other customers who have flown with American Airlines, Frontier and Alaska Airlines from Portland to Ontario have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,647 reviews

Boarding

8.2

Food

7.2

Entertainment

7.7

Comfort

8.1

Overall

8.1

Crew

8.7

Reviews

1 / 10

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

Southwest
8.1
Very good
4,647 reviews
Southwest
8.1
Very good
4,647 reviews

Boarding

8.2

Food

7.2

Entertainment

7.7

Comfort

8.1

Overall

8.1

Crew

8.7

Reviews

1 / 10

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

Alaska Airlines
8.0
Very good
9,704 reviews
Southwest
8.1
Very good
4,647 reviews

Boarding

8.2

Food

7.2

Entertainment

7.7

Comfort

8.1

Overall

8.1

Crew

8.7

Reviews

1 / 10

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

Delta
8.0
Very good
8,512 reviews
Southwest
8.1
Very good
4,647 reviews

Boarding

8.2

Food

7.2

Entertainment

7.7

Comfort

8.1

Overall

8.1

Crew

8.7

Reviews

1 / 10

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

United Airlines
7.4
Good
8,975 reviews
Southwest
8.1
Very good
4,647 reviews

Boarding

8.2

Food

7.2

Entertainment

7.7

Comfort

8.1

Overall

8.1

Crew

8.7

Reviews

1 / 10

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

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,647 reviews

Boarding

8.2

Food

7.2

Entertainment

7.7

Comfort

8.1

Overall

8.1

Crew

8.7

Reviews

1 / 10

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 Portland to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from Portland to Ontario?

    You will need to book a flight from Portland to Ontario if you want to fly from Portland to Ontario. At least 6 different airlines have flights from Portland (PDX) to Ontario (ONT) on a regular basis. There are 4 flights to Ontario from the Portland airport per day. If you manage to book one that is nonstop, then you can expect the flight time from PDX to ONT to be around 2h 14m.

  • How popular is this Portland to Ontario flight route?

    Flights from Portland to Ontario have been viewed 174 times in the past calendar month.

  • What are the cheapest airlines flying from Portland to Ontario round-trip?

    Frontier, at $114, was found to be the cheapest airline from Portland to Ontario.Alternate airlines to your destination round-trip include Alaska Airlines and Southwest. Frontier is priced at 42% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Portland to Ontario one-way?

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $39. Users have also found prices from $79 and $95 on Alaska Airlines and American Airlines, respectively.

  • What are the most reliable airlines from Portland to Ontario?

    The top 3 most reliable airlines when flying from Portland to Ontario are Southwest (100%), Frontier (91%) and British Airways (86%).

  • What are the cheapest flights from Portland to Ontario?

    While on average a flight from Portland to Ontario is generally $275, our data shows the cheapest flight currently is $40. When looking at the most popular route, (Portland - Ontario), you can expect to pay $133 for that flight.

  • Can I find deals for flights from Portland to Ontario that include hotel bookings?

    Yes. In addition to deals on Portland to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Portland to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Ontario.

  • Can I find deals for business class flights from Portland to Ontario?

    Yes. Cheapflights offers flight deals from Portland 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 Portland to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Portland to Ontario (average of $246). Flying from Portland to Ontario in March is currently the most expensive (average of $310). 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 Portland to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Portland to Ontario

Discover the top 6 airlines that operate flights from Portland 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 January 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$54Average$126FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$68Average$120FlexibilityNo cancel feeOn-time65%
Alaska AirlinesCheapest$156Average$287FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$186Average$359FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$196Average$401FlexibilityNo cancel feeOn-time63%
DeltaCheapest$211Average$374FlexibilityNo cancel feeOn-timeN/A
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