Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from Portland, Maine to Porto from $881

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 9/22. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Portland, Maine to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
3:00 pm - 10:30 am
PWM
-
OPO
14h 30m
1 stop
Delta Logo
5:00 am - 11:59 pm
OPO
-
PWM
23h 59m
2 stops
$881Delta
Tue, Sep 22 - Thu, Oct 1
Delta Logo
6:30 am - 10:25 am
PWM
-
OPO
22h 55m
1 stop
Delta Logo
5:00 am - 11:59 pm
OPO
-
PWM
23h 59m
2 stops
$886Delta
Sun, Sep 20 - Thu, Oct 1
Delta Logo
3:00 pm - 10:30 am
PWM
-
OPO
14h 30m
1 stop
Delta Logo
6:15 am - 11:49 pm
OPO
-
PWM
22h 34m
2 stops
$888Delta
Tue, Sep 22 - Tue, Oct 6
Delta Logo
6:30 am - 10:25 am
PWM
-
OPO
22h 55m
1 stop
Delta Logo
6:15 am - 11:49 pm
OPO
-
PWM
22h 34m
2 stops
$894Delta
Sun, Sep 20 - Tue, Oct 6
Air Canada Logo
6:00 am - 7:00 am
PWM
-
OPO
20h 00m
2 stops
Air Canada Logo
12:15 pm - 9:11 am
OPO
-
PWM
25h 56m
2 stops
$895Air Canada
Tue, Sep 22 - Tue, Oct 6
Delta Logo
3:00 pm - 10:30 am
PWM
-
OPO
14h 30m
1 stop
Delta Logo
4:25 pm - 1:53 pm
OPO
-
PWM
26h 28m
2 stops
$901Delta
Tue, Sep 22 - Mon, Oct 5
Delta Logo
6:00 am - 10:25 am
PWM
-
OPO
23h 25m
1 stop
Delta Logo
4:25 pm - 1:53 pm
OPO
-
PWM
26h 28m
2 stops
$906Delta
Sun, Sep 20 - Mon, Oct 5
Delta Logo
11:25 am - 10:20 am
PWM
-
OPO
17h 55m
1 stop
Delta Logo
5:00 am - 11:59 pm
OPO
-
PWM
23h 59m
2 stops
$941Delta
Sat, Sep 19 - Thu, Oct 1
Delta Logo
11:25 am - 3:25 pm
PWM
-
OPO
23h 00m
2 stops
Delta Logo
5:00 am - 11:59 pm
OPO
-
PWM
23h 59m
2 stops
$945Delta
Fri, Sep 18 - Thu, Oct 1
Delta Logo
3:00 pm - 10:30 am
PWM
-
OPO
14h 30m
1 stop
Delta Logo
12:25 pm - 11:59 pm
OPO
-
PWM
16h 34m
1 stop
$948Delta
Tue, Sep 22 - Sun, Oct 4

Delta flights from Portland, Maine to Porto

Our best Delta deals on Portland, Maine to Porto flight tickets
Delta
Sep 22
PWM3:00 pmPortland
14h 30m
1 stop
OPO10:30 amPorto
Oct 1
OPO5:00 amPorto
23h 59m
2 stops
PWM11:59 pmPortland
$881
Delta
Sep 20
PWM6:30 amPortland
22h 55m
1 stop
OPO10:25 amPorto
Oct 1
OPO5:00 amPorto
23h 59m
2 stops
PWM11:59 pmPortland
$886
Delta
Sep 22
PWM3:00 pmPortland
14h 30m
1 stop
OPO10:30 amPorto
Oct 6
OPO6:15 amPorto
22h 34m
2 stops
PWM11:49 pmPortland
$888

Air Canada flights from Portland, Maine to Porto

Our best Air Canada deals on Portland, Maine to Porto flight tickets
Air Canada
Sep 22
PWM6:00 amPortland
20h 00m
2 stops
OPO7:00 amPorto
Oct 6
OPO12:15 pmPorto
25h 56m
2 stops
PWM9:11 amPortland
$895
Air Canada
Sep 21
PWM9:10 amPortland
40h 50m
2 stops
OPO7:00 amPorto
Oct 6
OPO12:15 pmPorto
25h 56m
2 stops
PWM9:11 amPortland
$974
Air Canada
Sep 19
PWM10:43 amPortland
15h 17m
2 stops
OPO7:00 amPorto
Oct 6
OPO12:15 pmPorto
25h 56m
2 stops
PWM9:11 amPortland
$1,448

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 April 11, 2026.
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

Cheapest round-trip

PortlandPorto

PWM - OPO

PWMOPO

Portland

Tue 9/22

3:00 pm-10:30 am

1 stop14h 30m

Porto

Thu 10/1

5:00 am-11:59 pm

2 stops23h 59m

$881

PortlandPorto

PWM - OPO

PWMOPO

Portland

Sun 9/20

6:30 am-10:25 am

1 stop22h 55m

Porto

Thu 10/1

5:00 am-11:59 pm

2 stops23h 59m

$886

PortlandPorto

PWM - OPO

PWMOPO

Portland

Tue 9/22

3:00 pm-10:30 am

1 stop14h 30m

Porto

Tue 10/6

6:15 am-11:49 pm

2 stops22h 34m

$888

PortlandPorto

PWM - OPO

PWMOPO

Portland

Sun 9/20

6:30 am-10:25 am

1 stop22h 55m

Porto

Tue 10/6

6:15 am-11:49 pm

2 stops22h 34m

$894

PortlandPorto

PWM - OPO

PWMOPO

Portland

Tue 9/22

6:00 am-7:00 am

2 stops20h 00m

Porto

Tue 10/6

12:15 pm-9:11 am

2 stops25h 56m

$895

PortlandPorto

PWM - OPO

PWMOPO

Portland

Tue 9/22

3:00 pm-10:30 am

1 stop14h 30m

Porto

Mon 10/5

4:25 pm-1:53 pm

2 stops26h 28m

$901

PortlandPorto

PWM - OPO

PWMOPO

Portland

Sun 9/20

6:00 am-10:25 am

1 stop23h 25m

Porto

Mon 10/5

4:25 pm-1:53 pm

2 stops26h 28m

$906

PortlandPorto

PWM - OPO

PWMOPO

Portland

Sat 9/19

11:25 am-10:20 am

1 stop17h 55m

Porto

Thu 10/1

5:00 am-11:59 pm

2 stops23h 59m

$941

PortlandPorto

PWM - OPO

PWMOPO

Portland

Fri 9/18

11:25 am-3:25 pm

2 stops23h 00m

Porto

Thu 10/1

5:00 am-11:59 pm

2 stops23h 59m

$945
Quickest round-trip

PortlandPorto

PWM - OPO

PWMOPO

Portland

Tue 9/22

3:00 pm-10:30 am

1 stop14h 30m

Porto

Sun 10/4

12:25 pm-11:59 pm

1 stop16h 34m

$948

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, Iberia and United Airlines 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 79% 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

Fastest flight time

29h 05m

Direct flights

None
The fastest flight from Portland, Maine to Porto takes 29h 05m
There are no direct flights from Portland, Maine to Porto. There are no popular flight routes from Portland, Maine to Porto.
Search flight deals

Frequently asked questions about flying from Portland, Maine to Porto

  • How far is Portland to Porto by plane?

    Porto is 3072.7 mi away from Portland. Typically, this will take 29h 05m 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
Vila Nova de Gaia
Coimbra
Braga
Aveiro
Matosinhos
Esposende
Lamego
Chaves
Pinhao
Guimarães
Espinho
Arcos de Valdevez
Ponte de Lima
Viseu
Curia
Penafiel
Mesao Frio
Mira
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.

An easier way to manage your Porto 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.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Mon 5/11
Mon 5/18
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Portugal