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Cheap flights from Portland, Maine to Ontario from $195

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portland, Maine to Ontario departing on 9/17. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Portland, Maine to Ontario

Cheap round-trip flights

Delta Logo
2:36 pm - 11:11 pmPWM-YYZ
8h 35m1 stop
Delta Logo
2:30 pm - 10:54 amYYZ-PWM
20h 24m1 stop
$365Delta
Find Deal
Fri, Sep 5 - Sat, Sep 13
Delta Logo
7:00 am - 10:56 pmPWM-YYZ
15h 56m2 stops
Delta Logo
6:03 am - 12:34 amYYZ-PWM
18h 31m1 stop
$378Delta
Find Deal
Sat, Sep 20 - Sat, Sep 27
American Airlines Logo
11:58 am - 9:46 amPWM-YUL
21h 48m1 stop
American Airlines Logo
10:34 am - 8:19 pmYUL-PWM
33h 45m1 stop
$449American Airlines
Find Deal
Sat, Sep 20 - Sat, Sep 27
American Airlines Logo
6:00 am - 5:19 pmPWM-YYZ
11h 19m2 stops
American Airlines Logo
7:15 am - 4:50 pmYYZ-PWM
9h 35m1 stop
$475American Airlines
Find Deal
Sat, Sep 6 - Sat, Sep 13
United Airlines Logo
4:54 pm - 12:40 pmPWM-YYZ
19h 46m1 stop
United Airlines Logo
4:30 pm - 2:12 pmYYZ-PWM
21h 42m1 stop
$519United Airlines
Find Deal
Fri, Nov 14 - Sun, Nov 16
Logo
4:41 pm - 2:05 pmPWM-YYZ
21h 24m2 stops
Logo
1:35 pm - 2:52 pmYYZ-PWM
25h 17m3 stops
$582
Find Deal
Sat, Sep 20 - Sat, Sep 27
Logo
5:40 pm - 6:36 pmPWM-YYZ
24h 56m1 stop
Logo
6:30 am - 2:30 pmYYZ-PWM
8h 00m2 stops
$611
Find Deal
Thu, Sep 4 - Thu, Sep 11
United Airlines Logo
6:14 am - 11:49 amPWM-YYZ
5h 35m1 stop
United Airlines Logo
2:45 pm - 9:44 pmYYZ-PWM
6h 59m1 stop
$663United Airlines
Find Deal
Fri, Sep 19 - Fri, Sep 26
WestJet Logo
6:00 am - 12:27 amPWM-YUL
18h 27m2 stops
WestJet Logo
6:00 am - 4:05 pmYUL-PWM
10h 05m1 stop
$866WestJet
Find Deal
Thu, Sep 18 - Thu, Sep 25
WestJet Logo
11:50 am - 12:27 amPWM-YUL
12h 37m2 stops
WestJet Logo
6:45 am - 11:25 pmYUL-PWM
16h 40m2 stops
$912WestJet
Find Deal
Tue, Sep 9 - Wed, Sep 10

Delta flights from Portland, Maine to Region of Ontario

Our best Delta deals on Portland, Maine to Region of Ontario flight tickets
Delta
Sep 5
PWM2:36 pmPortland
8h 35m
1 stop
YYZ11:11 pmToronto Pearson Intl
Sep 13
YYZ2:30 pmToronto Pearson Intl
20h 24m
1 stop
PWM10:54 amPortland
$365
Find similar
Delta
Sep 20
PWM7:00 amPortland
15h 56m
2 stops
YYZ10:56 pmToronto Pearson Intl
Sep 27
YYZ6:03 amToronto Pearson Intl
18h 31m
1 stop
PWM12:34 amPortland
$378
Find similar
Delta
Oct 1
PWM1:40 pmPortland
8h 17m
1 stop
YUL9:57 pmMontreal Pierre Elliott Trudeau Intl
Oct 31
YUL9:28 amMontreal Pierre Elliott Trudeau Intl
7h 30m
1 stop
PWM4:58 pmPortland
$480
Find similar

United Airlines flights from Portland, Maine to Region of Ontario

Our best United Airlines deals on Portland, Maine to Region of Ontario flight tickets
United Airlines
Nov 14
PWM4:54 pmPortland
19h 46m
1 stop
YYZ12:40 pmToronto Pearson Intl
Nov 16
YYZ4:30 pmToronto Pearson Intl
21h 42m
1 stop
PWM2:12 pmPortland
$519
Find similar
United Airlines
Sep 19
PWM6:14 amPortland
5h 35m
1 stop
YYZ11:49 amToronto Pearson Intl
Sep 26
YYZ2:45 pmToronto Pearson Intl
6h 59m
1 stop
PWM9:44 pmPortland
$663
Find similar
United Airlines
Oct 27
PWM7:22 pmPortland
4h 24m
1 stop
YYZ11:46 pmToronto Pearson Intl
Oct 30
YYZ2:45 pmToronto Pearson Intl
9h 14m
1 stop
PWM11:59 pmPortland
$708
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Portland, Maine to Region of 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, momondo users made 832,500 searches. Data last updated August 5, 2025.
Use the filters below to find and compare flights from Portland, Maine to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Fri 9/5

2:36 pm-11:11 pm

1 stop8h 35m

Toronto Pearson Intl

Sat 9/13

2:30 pm-10:54 am

1 stop20h 24m

$365

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Sat 9/20

7:00 am-10:56 pm

2 stops15h 56m

Toronto Pearson Intl

Sat 9/27

6:03 am-12:34 am

1 stop18h 31m

$378

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Sat 9/20

11:58 am-9:46 am

1 stop21h 48m

Montreal Pierre Elliott Trudeau Intl

Sat 9/27

10:34 am-8:19 pm

1 stop33h 45m

$449

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Sat 9/6

6:00 am-5:19 pm

2 stops11h 19m

Toronto Pearson Intl

Sat 9/13

7:15 am-4:50 pm

1 stop9h 35m

$475

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Fri 11/14

4:54 pm-12:40 pm

1 stop19h 46m

Toronto Pearson Intl

Sun 11/16

4:30 pm-2:12 pm

1 stop21h 42m

$519

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Sat 9/20

4:41 pm-2:05 pm

2 stops21h 24m

Toronto Pearson Intl

Sat 9/27

1:35 pm-2:52 pm

3 stops25h 17m

$582

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Thu 9/4

5:40 pm-6:36 pm

1 stop24h 56m

Toronto Pearson Intl

Thu 9/11

6:30 am-2:30 pm

2 stops8h 00m

$611

PortlandToronto

PWM - YYZ

PWMYYZ

Portland

Fri 9/19

6:14 am-11:49 am

1 stop5h 35m

Toronto Pearson Intl

Fri 9/26

2:45 pm-9:44 pm

1 stop6h 59m

$663

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Thu 9/18

6:00 am-12:27 am

2 stops18h 27m

Montreal Pierre Elliott Trudeau Intl

Thu 9/25

6:00 am-4:05 pm

1 stop10h 05m

$866

PortlandMontreal

PWM - YUL

PWMYUL

Portland

Tue 9/9

11:50 am-12:27 am

2 stops12h 37m

Montreal Pierre Elliott Trudeau Intl

Wed 9/10

6:45 am-11:25 pm

2 stops16h 40m

$912

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Ontario from

How to get the cheapest flight ticket from Portland, Maine to Region of Ontario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Region of Ontario?

The month of March is, on average, the cheapest month to fly to Region of Ontario from Portland, Maine, with most prices found around $360. If you aren’t able to travel during the month of March, then book flights to Region of Ontario from Portland, Maine during January instead. Flights to Region of Ontario in January, while not as cheap as those in March, still average around $398.

What is the cheapest day to depart on your flight to Region of Ontario?

According to our data, Saturday is the cheapest day to fly to Region of Ontario from Portland, Maine. The lowest ticket price found for a Saturday departure recently was $286. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Portland, Maine to Region of Ontario on a Friday will generally be more expensive and average around $591. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Region of Ontario?

According to our data, the cheapest time of day to fly to Region of Ontario is in the afternoon. momondo users have found flights departing from Portland, Maine to Region of Ontario in the afternoon for as low as $457. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the morning are often more expensive with an average ticket price of $500.

Cheap Portland, Maine to Region of Ontario flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portland, Maine to Region of Ontario

Best Price Found

$195

Fastest flight time

4h 07m

Direct flights

None

Airports in Region of Ontario

2 airports
The best one-way flight to Region of Ontario from Portland, Maine in the past 72 hours is $195. The best round-trip flight deal from Portland, Maine to Region of Ontario found on momondo in the last 72 hours is $365.
The fastest flight from Portland, Maine to Region of Ontario takes 4h 07m
There are no direct flights from Portland, Maine to Region of Ontario. Popular non-direct routes for this connection are Portland Airport - Toronto Pearson Intl Airport and Portland Airport - Montreal Pierre Elliott Trudeau Intl Airport.
There are 2 airports near Region of Ontario: Montreal Pierre Elliott Trudeau Intl (YUL), Toronto Pearson Intl (YYZ)
Search flight deals

  • When did momondo last update prices for flights from Portland Airport to Ontario?

    Prices for flights from Portland Airport to Ontario are refreshed on a daily basis.

  • How many operators does momondo search for flights from Portland Airport to Ontario?

  • How old do you have to be to fly from Portland Airport to Ontario?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Portland Airport to Ontario.

  • What documentation or ID do you need to fly to Ontario?

    The travel and health documents required for your trip to Ontario can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ontario. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Portland, Maine to Region of Ontario

Compare and see reviews for airlines that fly from Portland, Maine to Region of Ontario with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $247Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Portland to Ontario?

It is quick and easy to find Portland to Ontario flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Ontario that suits you.

Can I find flights from Portland to Ontario with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Ontario from Portland with this policy.

How can momondo help me find flights from Portland to Ontario?

Once all potential Portland to Ontario flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Portland to Ontario right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Ontario, momondo offers a useful price alert feature which will track prices for flights to Ontario from Portland and alert you when they change.

An easier way to manage your Region of Ontario trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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