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$128+ Cheap flights from Portland, ME to Ontario (PWM - 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 4/12. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — ONT
feb. 25 — mar. 41
mar. 2/25
mar. 3/4
1 adult, Economy
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Cheap flight deals from Portland to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PWM) 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 febrero 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$407
(JetBlue Airways)

One-way from

$128
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$874
Provider with most accurate pricing for Portland-Ontario flight deals.
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Provider most trusted by Cheapflights users for Portland-Ontario flights.
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From Portland to Ontario
Search Deals
One-way flight from Portland to Ontario
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($73 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($32 potential savings vs. average RT price).
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Average for round-trip flights in February 2025
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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 febrero 20, 2025.

This JetBlue Airways 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 JetBlue Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 5/303:20 pmPWM - ONT
1 stop9h 02mJetBlue
vie. 6/610:40 pmONT - PWM
1 stop11h 40mJetBlue
Deal found 2/19$407
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 10/2711:16 amPWM - ONT
2 stops9h 37mAmerican Airlines
sáb. 11/111:59 pmONT - PWM
2 stops11h 08mAmerican Airlines
Deal found 2/19$473
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.
lun. 10/275:15 pmPWM - ONT
1 stop8h 35mSouthwest
sáb. 11/17:45 amONT - PWM
1 stop9h 50mSouthwest
Deal found 2/19$487
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 7/43:26 pmPWM - ONT
1 stop8h 28mUnited Airlines
mar. 7/87:00 amONT - PWM
1 stop12h 03mUnited Airlines
Deal found 2/18$546
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.
vie. 5/303:58 pmPWM - ONT
3 stops20h 19mAlaska Airlines
vie. 6/67:30 amONT - PWM
3 stops23h 16mAlaska Airlines
Deal found 2/19$1,340

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 febrero 20, 2025.

Fly from

Portland

Fly to

Ontario

Route

Depart

Return

Price

PortlandOntario

PWM - ONT

PWMONT

Portland

vie. 5/30

3:20 pm-9:22 pm

1 stop9h 02m

Ontario

vie. 6/6

10:40 pm-1:20 pm

1 stop11h 40m

$407

PortlandOntario

PWM - ONT

PWMONT

Portland

vie. 7/4

3:26 pm-8:54 pm

1 stop8h 28m

Ontario

mar. 7/8

7:00 am-10:03 pm

1 stop12h 03m

$546

PortlandOntario

PWM - ONT

PWMONT

Portland

vie. 5/30

2:02 pm-9:05 pm

1 stop10h 03m

Ontario

jue. 6/5

12:57 am-5:40 pm

1 stop13h 43m

$706

PortlandOntario

PWM - ONT

PWMONT

Portland

vie. 5/30

3:58 pm-9:17 am

3 stops20h 19m

Ontario

vie. 6/6

7:30 am-9:46 am

3 stops23h 16m

$1,340

PortlandOntario

PWM - ONT

PWMONT

Portland

sáb. 4/12

10:12 am-9:22 am

2 stops26h 10m

$128

PortlandOntario

PWM - ONT

PWMONT

Portland

jue. 5/1

3:20 pm-9:22 pm

1 stop9h 02m

$136

PortlandOntario

PWM - ONT

PWMONT

Portland

lun. 3/17

5:30 am-11:36 am

1 stop9h 06m

$230

PortlandOntario

PWM - ONT

PWMONT

Portland

mar. 4/8

6:00 am-2:50 pm

2 stops11h 50m

$231

PortlandOntario

PWM - ONT

PWMONT

Portland

sáb. 4/19

5:38 am-6:29 pm

2 stops15h 51m

$315

PortlandOntario

PWM - ONT

PWMONT

Portland

sáb. 5/17

1:59 pm-11:57 pm

2 stops12h 58m

$469

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

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 February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust 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, Maine-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland, Maine-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland, Maine-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Portland, Maine-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, Maine-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.

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

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

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 febrero 20, 2025.
Alaska Airlines
8.0
Very good
9,697 reviews

Food

7.1

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.1

Reviews

1 / 20

10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot

Alaska Airlines
8.0
Very good
9,697 reviews
Alaska Airlines
8.0
Very good
9,697 reviews

Food

7.1

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.1

Reviews

1 / 20

10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot

Delta
8.0
Very good
8,219 reviews
Alaska Airlines
8.0
Very good
9,697 reviews

Food

7.1

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.1

Reviews

1 / 20

10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot

JetBlue
7.4
Good
3,070 reviews
Alaska Airlines
8.0
Very good
9,697 reviews

Food

7.1

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.1

Reviews

1 / 20

10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot

United Airlines
7.4
Good
8,765 reviews
Alaska Airlines
8.0
Very good
9,697 reviews

Food

7.1

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.1

Reviews

1 / 20

10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot

American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,697 reviews

Food

7.1

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.1

Reviews

1 / 20

10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot

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 are the cheapest airlines flying from Portland, Maine to Ontario round-trip?

    JetBlue, at $407, was found to be the cheapest airline from Portland, Maine to Ontario.Alternate airlines to your destination round-trip include United Airlines and American Airlines. Users have found that JetBlue is 31% cheaper than the other options available to this destination.

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

    The cheapest airlines for a one-way flight from Portland, Maine to Ontario are Frontier ($128), JetBlue ($136), and Delta ($230).

  • 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, Maine to Ontario?

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

See more FAQs

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Top airline flying from Portland to Ontario

Discover the top airline 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 febrero 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$352Average$562FlexibilityNo cancel feeOn-time71%
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