Find flights
When to book
Airlines
FAQs

Cheap flights from Portland, ME to Ontario from C$ 230

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 28/5. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — YYZ
5 May — 12 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 30 April 2025.

Round-trip from

C$ 480

One-way from

C$ 230

Popular in

April

Cheapest in

September

Average price

C$ 750
Delta
  • Delta
  • 30/5-1/6
  • 2 total stops
  • 12h 13m total
  • Portland to Ontario
Search Deals
Air Canada
  • Air Canada
  • 28/5
  • 1 total stop
  • 6h 36m total
  • Portland to Ontario
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (C$ 145 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 25 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

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 April 2025.

Fri 30/56:05 a.m.PWM - YYZ
1 stop7h 35mDelta
Sun 1/66:15 a.m.YYZ - PWM
1 stop4h 38mDelta
Deal found 28/4C$ 480
Thu 5/61:40 p.m.PWM - YUL
1 stop7h 29mDelta
Sat 14/66:00 a.m.YUL - PWM
1 stop8h 44mDelta
Deal found 28/4C$ 512
Fri 30/56:10 a.m.PWM - YYZ
1 stop5h 34mAir Canada
Sun 1/612:05 p.m.YYZ - PWM
2 stops11h 23mAir Canada
Deal found 28/4C$ 527
Mon 16/67:02 a.m.PWM - YYZ
1 stop5h 02mAmerican Airlines
Wed 18/67:35 a.m.YYZ - PWM
1 stop15h 28mAmerican Airlines
Deal found 28/4C$ 530
Thu 5/62:35 p.m.PWM - YUL
3 stops29h 22mMultiple Airlines
Sat 14/66:45 a.m.YUL - PWM
3 stops37h 27mMultiple Airlines
Deal found 28/4C$ 538
Thu 29/56:00 a.m.PWM - YYZ
1 stop13h 37mMultiple Airlines
Sat 31/52:00 p.m.YYZ - PWM
2 stops9h 59mMultiple Airlines
Deal found 28/4C$ 547
Sat 31/512:15 p.m.PWM - YYZ
1 stop8h 08mUnited Airlines
Mon 2/612:05 p.m.YYZ - PWM
2 stops11h 22mUnited Airlines
Deal found 28/4C$ 587
Wed 2/77:02 a.m.PWM - YUL
1 stop9h 43mAmerican Airlines
Wed 9/710:30 a.m.YUL - PWM
1 stop9h 54mAmerican Airlines
Deal found 28/4C$ 588
Fri 23/51:40 p.m.PWM - YYZ
1 stop24h 00mWestJet
Mon 26/57:55 a.m.YYZ - PWM
1 stop15h 26mWestJet
Deal found 28/4C$ 626
Sun 15/66:03 a.m.PWM - YUL
1 stop4h 05mWestJet
Tue 1/75:00 p.m.YUL - PWM
1 stop6h 30mWestJet
Deal found 28/4C$ 793
Thu 5/64:43 p.m.PWM - YUL
1 stop24h 43mUnited Airlines
Sat 14/64:40 p.m.YUL - PWM
2 stops21h 51mUnited Airlines
Deal found 28/4C$ 825

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 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 30/5

6:05 a.m.-1:40 p.m.

1 stop7h 35m

Toronto Pearson Intl

Sun 1/6

6:15 a.m.-10:53 a.m.

1 stop4h 38m

C$ 480

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Thu 5/6

1:40 p.m.-9:09 p.m.

1 stop7h 29m

Montreal Pierre Elliott Trudeau Intl

Sat 14/6

6:00 a.m.-2:44 p.m.

1 stop8h 44m

C$ 512

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Fri 30/5

6:10 a.m.-11:44 a.m.

1 stop5h 34m

Toronto Pearson Intl

Sun 1/6

12:05 p.m.-11:28 p.m.

2 stops11h 23m

C$ 527

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Mon 16/6

7:02 a.m.-12:04 p.m.

1 stop5h 02m

Toronto Pearson Intl

Wed 18/6

7:35 a.m.-11:03 p.m.

1 stop15h 28m

C$ 530

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Thu 5/6

2:35 p.m.-7:57 p.m.

3 stops29h 22m

Montreal Pierre Elliott Trudeau Intl

Sat 14/6

6:45 a.m.-8:12 p.m.

3 stops37h 27m

C$ 538

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Thu 29/5

6:00 a.m.-7:37 p.m.

1 stop13h 37m

Toronto Pearson Intl

Sat 31/5

2:00 p.m.-11:59 p.m.

2 stops9h 59m

C$ 547

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Sat 31/5

12:15 p.m.-8:23 p.m.

1 stop8h 08m

Toronto Pearson Intl

Mon 2/6

12:05 p.m.-11:27 p.m.

2 stops11h 22m

C$ 587

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

C$ 588

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Fri 23/5

1:40 p.m.-1:40 p.m.

1 stop24h 00m

Toronto Pearson Intl

Mon 26/5

7:55 a.m.-11:21 p.m.

1 stop15h 26m

C$ 626

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Sun 15/6

6:03 a.m.-10:08 a.m.

1 stop4h 05m

Montreal Pierre Elliott Trudeau Intl

Tue 1/7

5:00 p.m.-11:30 p.m.

1 stop6h 30m

C$ 793

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/4

Showing 1-10 of 20 results
1
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 30 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 30 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
7,936 reviews
Check prices

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

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
7,936 reviews
Delta
8.0
Very good
7,936 reviews
Check prices

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

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
8,696 reviews
Delta
8.0
Very good
7,936 reviews
Check prices

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

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
7,936 reviews
Check prices

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

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
2,823 reviews
Delta
8.0
Very good
7,936 reviews
Check prices

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

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
9,242 reviews
Delta
8.0
Very good
7,936 reviews
Check prices

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

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$ 230 on Air Canada. Other airlines that offer cheap prices include American Airlines from C$ 235 and United Airlines from C$ 396 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Portland to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Boston to Pearson Intl flights
Boston to Toronto Island flights
Boston to Vancouver Intl flights
Boston to Pierre Elliott Trudeau Intl flights
Boston to Calgary flights
Boston to Halifax flights
Boston to Ottawa flights
Boston to Edmonton flights
Boston to Québec City flights
Boston to Victoria flights
Boston to St. John's flights
Portland to Vancouver Intl flights
Boston to Abbotsford flights
Portland to Pearson Intl flights
Bangor to Vancouver Intl flights
Boston to Charlottetown flights
Boston to Winnipeg flights
Boston to Sydney flights
Portland to Halifax flights
Boston to St John flights
Portland to Pierre Elliott Trudeau Intl flights
Boston to Hamilton flights
Boston to Saskatoon flights
Boston to Thunder Bay flights
Bangor to Pearson Intl flights
Boston to Moncton flights
Boston to Kelowna flights
Boston to Windsor flights
Boston to Regina flights
Bar Harbor to Pierre Elliott Trudeau Intl flights
Boston to Gander flights
Boston to Deer Lake flights
Bangor to Pierre Elliott Trudeau Intl flights
Rockland to St. John's flights
Boston to Fort McMurray flights
Boston to Nanaimo flights
Bangor to Charlottetown flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Portland to Ontario?

Cheapflights helps you search for flights from Portland to Ontario via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Portland to Ontario?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Portland to Ontario for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Portland to Ontario with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Portland to Ontario flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Portland to Ontario become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.