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Cheap flights from Portland, Maine to Porto from $740

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Portland, Maine to Porto departing on 10/22. 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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Find the cheapest flights from Portland, Maine to Porto

Cheap round-trip flights

American Airlines Logo
7:14 am - 7:35 amPWM-OPO
19h 21m2 stops
American Airlines Logo
8:40 pm - 8:40 pmOPO-PWM
28h 00m2 stops
$740American Airlines
Find Deal
Wed, Oct 22 - Wed, Oct 29
United Airlines Logo
5:41 pm - 9:45 amPWM-OPO
11h 04m1 stop
United Airlines Logo
6:00 am - 9:50 pmOPO-PWM
19h 50m2 stops
$759United Airlines
Find Deal
Wed, Oct 22 - Wed, Oct 29
Turkish Airlines Logo
2:17 pm - 9:50 amPWM-OPO
38h 33m2 stops
Turkish Airlines Logo
4:50 pm - 1:21 pmOPO-PWM
25h 31m2 stops
$897Turkish Airlines
Find Deal
Mon, Sep 15 - Mon, Sep 22
United Airlines Logo
3:11 pm - 6:55 amPWM-OPO
10h 44m1 stop
United Airlines Logo
12:10 pm - 9:59 pmOPO-PWM
38h 49m2 stops
$1,058United Airlines
Find Deal
Mon, Sep 15 - Mon, Sep 22
United Airlines Logo
6:23 pm - 9:35 amPWM-OPO
34h 12m2 stops
United Airlines Logo
11:20 am - 1:22 pmOPO-PWM
31h 02m2 stops
$1,080United Airlines
Find Deal
Sun, Sep 7 - Sun, Sep 14
United Airlines Logo
3:11 pm - 6:55 amPWM-OPO
10h 44m1 stop
United Airlines Logo
12:10 pm - 11:03 pmOPO-PWM
15h 53m2 stops
$1,424United Airlines
Find Deal
Sun, Sep 7 - Sun, Sep 14
Air Canada Logo
10:39 am - 9:35 amPWM-OPO
17h 56m3 stops
Air Canada Logo
10:00 am - 11:03 pmOPO-PWM
18h 03m3 stops
$1,453Air Canada
Find Deal
Mon, Sep 15 - Mon, Sep 22
Logo
5:33 pm - 9:35 amPWM-OPO
35h 02m3 stops
Logo
11:20 am - 1:51 pmOPO-PWM
31h 31m3 stops
$1,454
Find Deal
Sun, Sep 7 - Sun, Sep 14
Logo
10:39 am - 9:35 amPWM-OPO
17h 56m2 stops
Logo
10:00 am - 11:03 pmOPO-PWM
18h 03m3 stops
$1,651
Find Deal
Mon, Sep 15 - Mon, Sep 22
Air Canada Logo
3:45 pm - 3:00 pmPWM-OPO
18h 15m3 stops
Air Canada Logo
8:55 am - 11:17 pmOPO-PWM
18h 22m3 stops
$1,808Air Canada
Find Deal
Wed, Oct 22 - Wed, Oct 29

American Airlines flights from Portland, Maine to Porto

Our best American Airlines deals on Portland, Maine to Porto flight tickets
American Airlines
Oct 22
PWM7:14 amPortland
19h 21m
2 stops
OPO7:35 amPorto
Oct 29
OPO8:40 pmPorto
28h 00m
2 stops
PWM8:40 pmPortland
$740
Find similar
American Airlines
Oct 22
PWM2:10 pmPortland
16h 30m
3 stops
OPO11:40 amPorto
Oct 29
OPO8:20 amPorto
17h 47m
2 stops
PWM10:07 pmPortland
$7,765
Find similar

United Airlines flights from Portland, Maine to Porto

Our best United Airlines deals on Portland, Maine to Porto flight tickets
United Airlines
Oct 22
PWM5:41 pmPortland
11h 04m
1 stop
OPO9:45 amPorto
Oct 29
OPO6:00 amPorto
19h 50m
2 stops
PWM9:50 pmPortland
$759
Find similar
United Airlines
Sep 15
PWM3:11 pmPortland
10h 44m
1 stop
OPO6:55 amPorto
Sep 22
OPO12:10 pmPorto
38h 49m
2 stops
PWM9:59 pmPortland
$1,058
Find similar
United Airlines
Sep 7
PWM6:23 pmPortland
34h 12m
2 stops
OPO9:35 amPorto
Sep 14
OPO11:20 amPorto
31h 02m
2 stops
PWM1:22 pmPortland
$1,080
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Portland, Maine to Porto 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 2, 2025.
Use the filters below to find and compare flights from Portland, Maine to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortlandPorto

PWM - OPO

PWMOPO

Portland

Wed 10/22

7:14 am-7:35 am

2 stops19h 21m

Porto

Wed 10/29

8:40 pm-8:40 pm

2 stops28h 00m

$740

PortlandPorto

PWM - OPO

PWMOPO

Portland

Wed 10/22

5:41 pm-9:45 am

1 stop11h 04m

Porto

Wed 10/29

6:00 am-9:50 pm

2 stops19h 50m

$759

PortlandPorto

PWM - OPO

PWMOPO

Portland

Mon 9/15

2:17 pm-9:50 am

2 stops38h 33m

Porto

Mon 9/22

4:50 pm-1:21 pm

2 stops25h 31m

$897

PortlandPorto

PWM - OPO

PWMOPO

Portland

Mon 9/15

3:11 pm-6:55 am

1 stop10h 44m

Porto

Mon 9/22

12:10 pm-9:59 pm

2 stops38h 49m

$1,058

PortlandPorto

PWM - OPO

PWMOPO

Portland

Sun 9/7

6:23 pm-9:35 am

2 stops34h 12m

Porto

Sun 9/14

11:20 am-1:22 pm

2 stops31h 02m

$1,080

PortlandPorto

PWM - OPO

PWMOPO

Portland

Sun 9/7

3:11 pm-6:55 am

1 stop10h 44m

Porto

Sun 9/14

12:10 pm-11:03 pm

2 stops15h 53m

$1,424

PortlandPorto

PWM - OPO

PWMOPO

Portland

Mon 9/15

10:39 am-9:35 am

3 stops17h 56m

Porto

Mon 9/22

10:00 am-11:03 pm

3 stops18h 03m

$1,453

PortlandPorto

PWM - OPO

PWMOPO

Portland

Sun 9/7

5:33 pm-9:35 am

3 stops35h 02m

Porto

Sun 9/14

11:20 am-1:51 pm

3 stops31h 31m

$1,454

PortlandPorto

PWM - OPO

PWMOPO

Portland

Mon 9/15

10:39 am-9:35 am

2 stops17h 56m

Porto

Mon 9/22

10:00 am-11:03 pm

3 stops18h 03m

$1,651

PortlandPorto

PWM - OPO

PWMOPO

Portland

Wed 10/22

3:45 pm-3:00 pm

3 stops18h 15m

Porto

Wed 10/29

8:55 am-11:17 pm

3 stops18h 22m

$1,808

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Porto from

How to get the cheapest flight ticket from Portland, Maine to Porto

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 airlines fly to Porto?

TAP AIR PORTUGAL, Azores Airlines and Iberia are the top three most popular airlines that fly to Porto from Portland, Maine according to our data. TAP AIR PORTUGAL is the first choice among our users, with 69% of people opting to fly with this airline when traveling to Porto. Keep in mind that there are 11 different airlines that fly to Porto on a routine basis, so you have a few additional options to choose from.

When to book flights from Portland, Maine to Porto

Are you open to changing your travel dates? Check out the ideal times to fly from Portland, Maine to Porto according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Portland, Maine to Porto (PWM to OPO) flight deals and tips

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

Best Price Found

$740

Fastest flight time

10h 44m

Direct flights

None

Airports in Porto

1 airport
The best flight deal from Portland, Maine to Porto found on momondo in the last 72 hours is $740
The fastest flight from Portland, Maine to Porto takes 10h 44m
There are no direct flights from Portland, Maine to Porto. Popular non-direct route for this connection is Portland Airport - Porto Airport.
There is 1 airport near Porto: Porto (OPO)
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  • How far is Portland to Porto by plane?

    Porto is 3072.7 mi away from Portland. Typically, this will take 10h 44m by plane in normal conditions.

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

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Portland Airport to Porto Airport.

  • What documentation or ID do you need to fly to Porto Airport?

    The necessary travel and health documents for your Porto Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Aveiro
Vila Nova de Gaia
Coimbra
Matosinhos
Braga
Caminha
Guimarães
Chaves
Esposende
Lamego
Arcos de Valdevez
Espinho
Viseu
Ponte de Lima
Santa Maria da Feira
Curia
Penafiel
Mesao Frio
Pinhao
Baiao

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Portland to Porto. Millions of users trust and use momondo every year so you are in good hands.

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

All flight searches from Portland to Porto on momondo can be filtered to show those which offer flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Portland to Porto.

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

Yes momondo offers price alerts on flights to Porto from Portland. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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