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Cheap flights from Portland, ME to Ontario from C$ 228

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 13/9. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — YYZ
4 ago. — 11 ago.1
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 30 julio 2025.

Round-trip from

C$ 509

One-way from

C$ 241

Popular in

June

Cheapest in

March

Average price

C$ 774
Delta
  • Delta
  • 21/10-28/10
  • 2 total stops
  • 16h 33m total
  • Portland to Ontario
Search Deals
Delta
  • Delta
  • 12/9
  • 1 total stop
  • 8h 18m total
  • Portland to Ontario
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (C$ 139 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 30 julio 2025.

mar. 21/102:38 p.m.PWM - YYZ
1 stop8h 27mDelta
mar. 28/106:15 a.m.YYZ - PWM
1 stop8h 06mDelta
Deal found 29/7C$ 509
mar. 21/107:00 a.m.PWM - YYZ
1 stop16h 02mAmerican Airlines
mar. 28/107:14 a.m.YYZ - PWM
1 stop13h 00mAmerican Airlines
Deal found 29/7C$ 550
sáb. 13/98:40 a.m.PWM - YUL
1 stop25h 06mAmerican Airlines
sáb. 20/910:34 a.m.YUL - PWM
1 stop25h 57mAmerican Airlines
Deal found 29/7C$ 568
sáb. 23/86:00 a.m.PWM - YYZ
1 stop16h 23mMultiple Airlines
mar. 26/88:35 a.m.YYZ - PWM
1 stop9h 51mMultiple Airlines
Deal found 29/7C$ 766
vie. 3/105:45 a.m.PWM - YYZ
1 stop10h 12mUnited Airlines
lun. 6/107:25 a.m.YYZ - PWM
2 stops10h 58mUnited Airlines
Deal found 30/7C$ 792
lun. 15/96:00 a.m.PWM - YUL
1 stop16h 06mMultiple Airlines
mar. 16/98:10 a.m.YUL - PWM
1 stop14h 53mMultiple Airlines
Deal found 29/7C$ 832
sáb. 13/96:23 p.m.PWM - YUL
1 stop16h 17mUnited Airlines
sáb. 20/99:45 a.m.YUL - PWM
1 stop7h 57mUnited Airlines
Deal found 30/7C$ 982
sáb. 13/97:00 a.m.PWM - YUL
2 stops17h 27mWestJet
sáb. 20/912:55 p.m.YUL - PWM
1 stop23h 00mWestJet
Deal found 30/7C$ 1,102

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 30 julio 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

mar. 21/10

2:38 p.m.-11:05 p.m.

1 stop8h 27m

Toronto Pearson Intl

mar. 28/10

6:15 a.m.-2:21 p.m.

1 stop8h 06m

C$ 509

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

mar. 21/10

7:00 a.m.-11:02 p.m.

1 stop16h 02m

Toronto Pearson Intl

mar. 28/10

7:14 a.m.-8:14 p.m.

1 stop13h 00m

C$ 550

PortlandMontreal

PWM - YUL

PWMYUL

Portland

sáb. 13/9

8:40 a.m.-9:46 a.m.

1 stop25h 06m

Montreal Pierre Elliott Trudeau Intl

sáb. 20/9

10:34 a.m.-12:31 p.m.

1 stop25h 57m

C$ 568

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

sáb. 23/8

6:00 a.m.-10:23 p.m.

1 stop16h 23m

Toronto Pearson Intl

mar. 26/8

8:35 a.m.-6:26 p.m.

1 stop9h 51m

C$ 766

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

vie. 3/10

5:45 a.m.-3:57 p.m.

1 stop10h 12m

Toronto Pearson Intl

lun. 6/10

7:25 a.m.-6:23 p.m.

2 stops10h 58m

C$ 792

PortlandMontreal

PWM - YUL

PWMYUL

Portland

lun. 15/9

6:00 a.m.-10:06 p.m.

1 stop16h 06m

Montreal Pierre Elliott Trudeau Intl

mar. 16/9

8:10 a.m.-11:03 p.m.

1 stop14h 53m

C$ 832

PortlandMontreal

PWM - YUL

PWMYUL

Portland

sáb. 13/9

6:23 p.m.-10:40 a.m.

1 stop16h 17m

Montreal Pierre Elliott Trudeau Intl

sáb. 20/9

9:45 a.m.-5:42 p.m.

1 stop7h 57m

C$ 982

PortlandMontreal

PWM - YUL

PWMYUL

Portland

sáb. 13/9

7:00 a.m.-12:27 a.m.

2 stops17h 27m

Montreal Pierre Elliott Trudeau Intl

sáb. 20/9

12:55 p.m.-11:55 a.m.

1 stop23h 00m

C$ 1,102

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

sáb. 13/9

2:41 p.m.-10:59 p.m.

1 stop8h 18m

C$ 228

PortlandMontreal

PWM - YUL

PWMYUL

Portland

mar. 16/9

1:40 p.m.-9:57 p.m.

1 stop8h 17m

C$ 241

Flights are sorted by cheapest round-trip flights first.

Deals found on 30/7

Showing 1-10 of 17 results
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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.

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 30 julio 2025.
Read through reviews of airlines operating flights from Portland to Ontario, such as Delta,United Airlines, andAmerican Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,980 reviews
Check prices

Overall

8.0

Entertainment

7.9

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,980 reviews
Delta
8.0
Very good
7,980 reviews
Check prices

Overall

8.0

Entertainment

7.9

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,896 reviews
Delta
8.0
Very good
7,980 reviews
Check prices

Overall

8.0

Entertainment

7.9

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,980 reviews
Check prices

Overall

8.0

Entertainment

7.9

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
WestJet
7.2
Good
2,975 reviews
Delta
8.0
Very good
7,980 reviews
Check prices

Overall

8.0

Entertainment

7.9

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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$ 241 on Delta. Other airlines that offer cheap prices include American Airlines from C$ 277 and United Airlines from C$ 378 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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