Cheap flights from Portland, ME to Ontario from C$ 249
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.
Cheap flight deals from Portland to Ontario
Keep the following information in mind while searching for Portland to Ontario flight deals. Data was last updated 12 June 2025.
Find flight deals from Portland to Ontario
Cheapest flights from Portland to OntarioExplore 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 12 June 2025.
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 12 June 2025.
Cheapflights Fare Finder
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 629,999 searches. Data last updated 12 June 2025.
Use the filters below to find and compare flights from Portland to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
PortlandMontreal
PWM - YUL
PWMYUL
Portland
Sat 16/8
7:00 a.m.-8:04 p.m.
1 stop13h 04m
Montreal Pierre Elliott Trudeau Intl
Tue 19/8
6:00 a.m.-11:25 p.m.
1 stop17h 25m
PortlandToronto
PWM - YYZ
PWMYYZ
Portland
Sat 16/8
7:00 a.m.-4:10 p.m.
1 stop9h 10m
Toronto Pearson Intl
Wed 20/8
2:30 p.m.-11:25 p.m.
1 stop8h 55m
PortlandMontreal
PWM - YUL
PWMYUL
Portland
Wed 2/7
7:02 a.m.-4:45 p.m.
1 stop9h 43m
Montreal Pierre Elliott Trudeau Intl
Wed 9/7
10:30 a.m.-8:24 p.m.
1 stop9h 54m
PortlandToronto
PWM - YYZ
PWMYYZ
Portland
Fri 4/7
7:00 a.m.-5:40 p.m.
1 stop10h 40m
Toronto Pearson Intl
Fri 11/7
7:15 a.m.-8:24 p.m.
1 stop13h 09m
PortlandToronto
PWM - YYZ
PWMYYZ
Portland
Thu 3/7
1:10 p.m.-9:08 p.m.
2 stops31h 58m
Toronto Pearson Intl
Sat 12/7
6:30 a.m.-8:12 p.m.
2 stops37h 42m
PortlandMontreal
PWM - YUL
PWMYUL
Portland
Tue 8/7
6:01 a.m.-10:34 a.m.
1 stop4h 33m
Montreal Pierre Elliott Trudeau Intl
Tue 15/7
3:30 p.m.-11:14 p.m.
1 stop7h 44m
PortlandToronto
PWM - YYZ
PWMYYZ
Portland
Fri 25/7
7:28 a.m.-1:47 p.m.
1 stop6h 19m
Toronto Pearson Intl
Fri 1/8
12:45 p.m.-11:59 p.m.
1 stop11h 14m
PortlandMontreal
PWM - YUL
PWMYUL
Portland
Fri 10/10
8:00 a.m.-5:00 p.m.
1 stop9h 00m
Montreal Pierre Elliott Trudeau Intl
Tue 14/10
1:15 p.m.-11:13 p.m.
1 stop9h 58m
PortlandToronto
PWM - YYZ
PWMYYZ
Portland
Fri 4/7
7:28 a.m.-5:29 p.m.
2 stops10h 01m
Toronto Pearson Intl
Fri 11/7
2:00 p.m.-11:14 p.m.
2 stops9h 14m
PortlandMontreal
PWM - YUL
PWMYUL
Portland
Sun 17/8
6:00 a.m.-1:09 p.m.
1 stop7h 09m
Montreal Pierre Elliott Trudeau Intl
Sun 17/8
3:41 p.m.-11:58 p.m.
1 stop8h 17m
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.
Cheapflights Insights
Everything you need to know about your flight from Portland to Ontario
What is the cheapest month to book a flight from Portland, Maine to Region of Ontario?
Currently, January is the cheapest month in which you can book a flight from Portland, Maine to Region of Ontario (average of C$ 167). Flying from Portland, Maine to Region of Ontario in July is currently the most expensive (average of C$ 255). 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 PWM to ON?
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 12 June 2025.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Portland, Maine to Region of Ontario as you normally would.
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 Region of Ontario ranges from 51.0 - 83.0 mm per month. June is typically the wettest month, when rainfall can reach 83.0 mm. February is typically the driest time to visit Region of Ontario when rainfall is around 51.0 mm.
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 Region of Ontario, 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 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -6.0 C).
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 12 June 2025.
See what other customers who have flown with Delta, United Airlines and American Airlines from Portland to Ontario have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
Boarding
Comfort
Overall
Entertainment
Crew
Reviews
Kim,May 2025
PIH - SLC
Food
Boarding
Comfort
Overall
Entertainment
Crew
Reviews
Kim,May 2025
PIH - SLC
Food
Boarding
Comfort
Overall
Entertainment
Crew
Reviews
Kim,May 2025
PIH - SLC
Food
Boarding
Comfort
Overall
Entertainment
Crew
Reviews
Kim,May 2025
PIH - SLC
Food
Boarding
Comfort
Overall
Entertainment
Crew
Reviews
Kim,May 2025
PIH - SLC
Food
Boarding
Comfort
Overall
Entertainment
Crew
Reviews
Kim,May 2025
PIH - SLC
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.
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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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