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Cheap flights from Portland, ME to Ontario from C$ 160

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 16/8. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — YYZ
27 Apr — 4 May1
1 adult

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 22 April 2025.

Round-trip from

C$ 396

One-way from

C$ 160

Popular in

May

Cheapest in

September

Average price

C$ 749
American Airlines
  • American Airlines
  • 6/6-13/6
  • 2 total stops
  • 24h 30m total
  • Portland to Ontario
Search Deals
American Airlines
  • American Airlines
  • 16/8
  • 1 total stop
  • 8h 56m total
  • Portland to Ontario
Search Deals
Highest demand for flights based on searches. 22% potential increase in price (C$ 237 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease (C$ 54 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 22 April 2025.

Fri 6/67:02 a.m.PWM - YYZ
1 stop11h 32mAmerican Airlines
Fri 13/67:15 a.m.YYZ - PWM
1 stop12h 58mAmerican Airlines
Deal found 21/4C$ 396
Mon 5/55:30 a.m.PWM - YYZ
1 stop10h 29mUnited Airlines
Mon 5/56:00 p.m.YYZ - PWM
1 stop5h 27mUnited Airlines
Deal found 21/4C$ 446
Tue 6/56:00 a.m.PWM - YYZ
1 stop6h 46mAir Canada
Tue 6/54:00 p.m.YYZ - PWM
2 stops7h 27mAir Canada
Deal found 21/4C$ 454
Tue 20/56:35 a.m.PWM - YYZ
1 stop4h 45mDelta
Mon 26/56:15 p.m.YYZ - PWM
1 stop5h 59mDelta
Deal found 21/4C$ 478
Thu 5/61:40 p.m.PWM - YUL
1 stop26h 24mDelta
Sat 14/66:00 a.m.YUL - PWM
1 stop15h 24mDelta
Deal found 21/4C$ 586
Thu 12/68:56 p.m.PWM - YYZ
2 stops24h 04mMultiple Airlines
Sun 15/69:10 a.m.YYZ - PWM
3 stops33h 28mMultiple Airlines
Deal found 21/4C$ 671
Thu 22/51:40 p.m.PWM - YYZ
1 stop7h 04mWestJet
Mon 26/56:30 a.m.YYZ - PWM
1 stop9h 33mWestJet
Deal found 21/4C$ 682
Fri 23/511:50 a.m.PWM - YUL
1 stop26h 30mMultiple Airlines
Sun 25/510:00 a.m.YUL - PWM
2 stops32h 38mMultiple Airlines
Deal found 21/4C$ 704
Fri 30/55:24 p.m.PWM - YUL
2 stops22h 01mAmerican Airlines
Mon 2/610:44 a.m.YUL - PWM
1 stop23h 36mAmerican Airlines
Deal found 21/4C$ 739
Sat 28/68:00 a.m.PWM - YUL
1 stop5h 09mAir Canada
Sat 28/63:41 p.m.YUL - PWM
1 stop7h 33mAir Canada
Deal found 21/4C$ 837
Mon 21/76:00 a.m.PWM - YUL
1 stop7h 09mUnited Airlines
Thu 24/77:10 p.m.YUL - PWM
1 stop4h 49mUnited Airlines
Deal found 21/4C$ 909
Tue 6/57:00 a.m.PWM - YUL
2 stops17h 37mWestJet
Thu 8/56:00 a.m.YUL - PWM
1 stop10h 03mWestJet
Deal found 21/4C$ 916

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 22 April 2025.
Use the filters below to find and compare flights from Portland to Ontario that are best for you.

Fly from

Portland

Fly to

Ontario

Route

Depart

Return

Price

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Fri 6/6

7:02 a.m.-6:34 p.m.

1 stop11h 32m

Toronto Pearson Intl

Fri 13/6

7:15 a.m.-8:13 p.m.

1 stop12h 58m

C$ 396

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Mon 5/5

5:30 a.m.-3:59 p.m.

1 stop10h 29m

Toronto Pearson Intl

Mon 5/5

6:00 p.m.-11:27 p.m.

1 stop5h 27m

C$ 446

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Tue 6/5

6:00 a.m.-12:46 p.m.

1 stop6h 46m

Toronto Pearson Intl

Tue 6/5

4:00 p.m.-11:27 p.m.

2 stops7h 27m

C$ 454

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Tue 20/5

6:35 a.m.-11:20 a.m.

1 stop4h 45m

Toronto Pearson Intl

Mon 26/5

6:15 p.m.-12:14 a.m.

1 stop5h 59m

C$ 478

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Thu 5/6

1:40 p.m.-4:04 p.m.

1 stop26h 24m

Montreal Pierre Elliott Trudeau Intl

Sat 14/6

6:00 a.m.-9:24 p.m.

1 stop15h 24m

C$ 586

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Thu 12/6

8:56 p.m.-9:00 p.m.

2 stops24h 04m

Toronto Pearson Intl

Sun 15/6

9:10 a.m.-6:38 p.m.

3 stops33h 28m

C$ 671

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Thu 22/5

1:40 p.m.-8:44 p.m.

1 stop7h 04m

Toronto Pearson Intl

Mon 26/5

6:30 a.m.-4:03 p.m.

1 stop9h 33m

C$ 682

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Fri 23/5

11:50 a.m.-2:20 p.m.

1 stop26h 30m

Montreal Pierre Elliott Trudeau Intl

Sun 25/5

10:00 a.m.-6:38 p.m.

2 stops32h 38m

C$ 704

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Fri 30/5

5:24 p.m.-3:25 p.m.

2 stops22h 01m

Montreal Pierre Elliott Trudeau Intl

Mon 2/6

10:44 a.m.-10:20 a.m.

1 stop23h 36m

C$ 739

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Sat 28/6

8:00 a.m.-1:09 p.m.

1 stop5h 09m

Montreal Pierre Elliott Trudeau Intl

Sat 28/6

3:41 p.m.-11:14 p.m.

1 stop7h 33m

C$ 837

Flights are sorted by cheapest round-trip flights first.

Deals found on 21/4

Showing 1-10 of 19 results
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2

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.

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$ 258). 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 22 April 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 22 April 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.
Delta
8.0
Very good
7,920 reviews
Check prices

Boarding

8.2

Food

7.3

Entertainment

7.9

Comfort

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,920 reviews
Delta
8.0
Very good
7,920 reviews
Check prices

Boarding

8.2

Food

7.3

Entertainment

7.9

Comfort

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,684 reviews
Delta
8.0
Very good
7,920 reviews
Check prices

Boarding

8.2

Food

7.3

Entertainment

7.9

Comfort

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,920 reviews
Check prices

Boarding

8.2

Food

7.3

Entertainment

7.9

Comfort

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
WestJet
7.2
Good
2,813 reviews
Delta
8.0
Very good
7,920 reviews
Check prices

Boarding

8.2

Food

7.3

Entertainment

7.9

Comfort

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air Canada
7.0
Good
9,179 reviews
Delta
8.0
Very good
7,920 reviews
Check prices

Boarding

8.2

Food

7.3

Entertainment

7.9

Comfort

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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 airport do you fly from for flights from Portland to Ontario?

    If you book a flight to Ontario from Portland, you will be flying from Portland, which is the city’s only airport. Portland (PWM) is located 4.7 km from the centre of Portland.

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

    One-way options have recently been found by users for as low as C$ 160 on American Airlines. Other airlines that offer cheap prices include Delta from C$ 195 and Air Canada from C$ 202 one-way.

  • 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 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$ 258). 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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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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