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$149+ Cheap flights from Ontario to Portland, ME (ONT - PWM)

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 6/7. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PWM
Apr 20 — Apr 271
Sun 4/20
Sun 4/27
1 adult, Economy
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Cheap flight deals from Ontario to Portland

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Portland (PWM). 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 April 15, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$291
(JetBlue)

One-way from

$149
(Delta)

Popular in

November

Cheapest in

January

Average price

$580
Provider with most accurate pricing for Ontario-Portland flight deals.
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Provider most trusted by Cheapflights users for Ontario-Portland flights.
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From Ontario to Portland
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One-way flight from Ontario to Portland
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($122 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($27 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find flight deals from Ontario to Portland

Cheapest flights from Ontario to Portland
Explore the most affordable flight options available from Ontario to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 15, 2025.

This JetBlue deal was found by Cheapflights users on 4/15. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/910:59 pmONT - PWM
1 stop11h 21mJetBlue
Mon 5/123:35 pmPWM - ONT
1 stop8h 36mJetBlue
Deal found 4/15$291
This Delta deal was found by Cheapflights users on 4/13. 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 7/912:00 pmONT - PWM
1 stop8h 59mDelta
Tue 7/156:00 amPWM - ONT
1 stop8h 07mDelta
Deal found 4/13$297
This American Airlines deal was found by Cheapflights users on 4/15. 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.
Wed 6/410:00 amONT - PWM
2 stops9h 45mAmerican Airlines
Sat 6/76:18 pmPWM - ONT
1 stop8h 41mAmerican Airlines
Deal found 4/15$306
This Southwest deal was found by Cheapflights users on 4/14. 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.
Thu 5/17:35 pmONT - PWM
2 stops12h 30mSouthwest
Wed 5/72:20 pmPWM - ONT
2 stops10h 25mSouthwest
Deal found 4/14$338
This United Airlines deal was found by Cheapflights users on 4/15. 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.
Tue 8/267:00 amONT - PWM
1 stop7h 42mUnited Airlines
Fri 8/294:58 pmPWM - ONT
1 stop8h 28mUnited Airlines
Deal found 4/15$374
This Alaska Airlines deal was found by Cheapflights users on 4/15. 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.
Fri 7/184:00 pmONT - PWM
2 stops15h 43mAlaska Airlines
Tue 7/2212:26 pmPWM - ONT
2 stops14h 33mAlaska Airlines
Deal found 4/15$738

Cheapflights Fare Finder

Customize your flight search to find flights from Ontario to Portland 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 April 15, 2025.
Use the filters below to find and compare flights from Ontario to Portland that are best for you.

Fly from

Ontario

Fly to

Portland

Route

Depart

Return

Price

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Fri 5/9

10:59 pm-1:20 pm

1 stop11h 21m

Portland

Mon 5/12

3:35 pm-9:11 pm

1 stop8h 36m

$291

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Wed 7/9

12:00 pm-11:59 pm

1 stop8h 59m

Portland

Tue 7/15

6:00 am-11:07 am

1 stop8h 07m

$297

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Wed 6/4

10:00 am-10:45 pm

2 stops9h 45m

Portland

Sat 6/7

6:18 pm-11:59 pm

1 stop8h 41m

$306

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Thu 5/1

7:35 pm-11:05 am

2 stops12h 30m

Portland

Wed 5/7

2:20 pm-9:45 pm

2 stops10h 25m

$338

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Tue 8/26

7:00 am-5:42 pm

1 stop7h 42m

Portland

Fri 8/29

4:58 pm-10:26 pm

1 stop8h 28m

$374

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Fri 7/18

4:00 pm-10:43 am

2 stops15h 43m

Portland

Tue 7/22

12:26 pm-11:59 pm

2 stops14h 33m

$738

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Sat 6/7

12:18 pm-11:59 pm

1 stop8h 41m

$149

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Fri 6/13

11:45 pm-1:23 pm

1 stop10h 38m

$156

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Sun 5/25

7:00 am-11:57 pm

2 stops13h 57m

$235

OntarioPortland

ONT - PWM

ONTPWM

Ontario

Sat 5/17

12:59 am-7:33 pm

2 stops15h 34m

$267

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/15

Showing 1-10 of 13 results
1
2

Compare providers for flights from Ontario to Portland

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 Ontario to Portland in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice 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 Ontario-Portland, Maine flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Portland, Maine flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Portland, Maine flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Portland, Maine flights, Cheapflights users trust eDreams the most. eDreams 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 Ontario-Portland, Maine 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 Ontario to Portland

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

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

Currently, January is the cheapest month in which you can book a flight from Ontario to Portland, Maine (average of $296). Flying from Ontario to Portland, Maine in May is currently the most expensive (average of $416). 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 ONT to PWM?

Find hourly flight availability from Ontario to Portland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 15, 2025.

A simple way to save on the total cost of your ticket is to fly from Ontario to Portland, Maine in the afternoon. If you’re flexible enough to do this you can expect to save up to 36% on your trip compared to booking a flight in the morning.

Rainfall in Portland by month

Plan your trip to Portland by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Portland, Maine ranges from 2.9 - 4.5 inches per month. November is typically the wettest month, when rainfall can reach 4.5 in. August is typically the driest time to visit Portland, Maine when rainfall is around 2.9 in.

Temperature in Portland by month

Plan your trip to Portland by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Portland, Maine, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

Reviews of airlines servicing Portland

Get insights into the airlines that provide service to Portland. 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 Portland. Reviews last updated April 15, 2025.
Alaska Airlines
8.0
Very good
9,876 reviews

Comfort

7.9

Food

7.1

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,876 reviews
Alaska Airlines
8.0
Very good
9,876 reviews

Comfort

7.9

Food

7.1

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Southwest
8.0
Very good
4,279 reviews
Alaska Airlines
8.0
Very good
9,876 reviews

Comfort

7.9

Food

7.1

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,917 reviews
Alaska Airlines
8.0
Very good
9,876 reviews

Comfort

7.9

Food

7.1

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,658 reviews
Alaska Airlines
8.0
Very good
9,876 reviews

Comfort

7.9

Food

7.1

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
JetBlue
7.3
Good
2,926 reviews
Alaska Airlines
8.0
Very good
9,876 reviews

Comfort

7.9

Food

7.1

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Related info for your journey

Find useful and relevant information for your journey from Ontario to Portland. 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 Ontario to Portland, Maine round-trip?

    Currently priced at $291, JetBlue will fly you from Ontario to Portland, Maine and back. In addition to JetBlue, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and American Airlines - these airlines can fly you to your destination from $297 and $306, respectively. JetBlue is 43% cheaper than the average price of flights available within the next 90 days to this destination.

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

    $149 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on JetBlue and United Airlines, with prices starting from $156 and $235, respectively.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Ontario to Portland, Maine (average of $296). Flying from Ontario to Portland, Maine in May is currently the most expensive (average of $416). 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

Traveling to a place near Ontario?

Book flights to Ontario if you plan to visit one of these locations
North Conway
Bath
Brunswick
Auburn
Conway
Lewiston

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Top 5 airlines flying from Ontario to Portland

Discover the top 5 airlines that operate flights from Ontario to Portland. 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 April 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$259Average$392FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$327Average$485FlexibilityNo cancel feeOn-time71%
DeltaCheapest$353Average$707FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$384Average$812FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$523Average$796FlexibilityNo cancel feeOn-time63%

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