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

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

How many operators does momondo search for flights from Maine to Porto Airport?

As of February 2026, there are 11 operators available to choose from for flights from Maine to Porto Airport.

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

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Maine to Porto Airport.

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

The travel and health documents you'll need for your trip to Porto Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Porto Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$236 Cheap Flights from Maine to Porto in 2026

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Find the cheapest flights from Maine to Porto

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Cheap round-trip flights

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10:45 pm - 3:30 pm

BOS

OPO

11h 45m

1 stop

10:35 pm - 2:40 pm

OPO

BOS

21h 05m

1 stop

$364TAP AIR PORTUGAL

Sun, Mar 29 - Mon, Apr 6

6:27 pm - 9:30 am

BOS

OPO

10h 03m

1 stop

12:35 pm - 9:41 pm

OPO

BOS

13h 06m

1 stop

$367United Airlines

Mon, Feb 23 - Thu, Mar 12

6:27 pm - 9:30 am

BOS

OPO

10h 03m

1 stop

12:35 pm - 11:57 pm

OPO

BOS

15h 22m

2 stops

$368United Airlines

Mon, Feb 23 - Thu, Mar 12

9:50 pm - 11:10 am

BOS

OPO

32h 20m

1 stop

12:05 pm - 8:20 pm

OPO

BOS

13h 15m

1 stop

$369SWISS

Wed, Feb 18 - Tue, Mar 3

9:50 pm - 11:10 am

BOS

OPO

32h 20m

1 stop

7:25 pm - 8:20 pm

OPO

BOS

29h 55m

1 stop

$370SWISS

Wed, Feb 18 - Tue, Feb 24

6:27 pm - 9:30 am

BOS

OPO

10h 03m

1 stop

12:35 pm - 11:57 pm

OPO

BOS

15h 22m

2 stops

$371United Airlines

Mon, Feb 23 - Thu, Mar 12

4:35 pm - 6:35 pm

BOS

OPO

21h 00m

2 stops

7:25 pm - 9:32 am

OPO

BOS

43h 07m

2 stops

$373Multiple Airlines

Wed, Feb 18 - Tue, Feb 24

11:34 am - 7:40 am

BOS

OPO

15h 06m

2 stops

12:25 pm - 8:50 pm

OPO

BOS

12h 25m

1 stop

$374Iberia

Wed, Mar 4 - Wed, Mar 11

12:51 pm - 3:25 pm

PWM

OPO

21h 34m

2 stops

5:00 am - 11:59 pm

OPO

PWM

23h 59m

2 stops

$662Delta

Mon, Mar 30 - Tue, Apr 7

3:05 pm - 9:30 am

PWM

OPO

13h 25m

1 stop

12:35 pm - 11:04 pm

OPO

PWM

14h 29m

1 stop

$710Multiple Airlines

Wed, Feb 25 - Wed, Mar 11

United Airlines flights from Maine to Porto

Our best United Airlines deals on Maine to Porto flight tickets

United Airlines

Feb 23

BOS7:19 pmBoston Logan Intl

33h 11m

2 stops

OPO9:30 amPorto

Mar 12

OPO12:35 pmPorto

15h 22m

2 stops

BOS11:57 pmBoston Logan Intl

$367

United Airlines

Feb 23

BOS6:27 pmBoston Logan Intl

10h 03m

1 stop

OPO9:30 amPorto

Mar 12

OPO12:35 pmPorto

15h 22m

2 stops

BOS11:57 pmBoston Logan Intl

$368

United Airlines

Feb 23

BOS6:27 pmBoston Logan Intl

10h 03m

1 stop

OPO9:30 amPorto

Mar 12

OPO12:35 pmPorto

15h 22m

2 stops

BOS11:57 pmBoston Logan Intl

$371

Iberia flights from Maine to Porto

Our best Iberia deals on Maine to Porto flight tickets

Iberia

Mar 4

BOS11:34 amBoston Logan Intl

15h 06m

2 stops

OPO7:40 amPorto

Mar 11

OPO12:25 pmPorto

12h 25m

1 stop

BOS8:50 pmBoston Logan Intl

$374

Iberia

Apr 6

BOS10:50 pmBoston Logan Intl

17h 30m

1 stop

OPO9:20 pmPorto

Apr 15

OPO8:20 amPorto

15h 28m

2 stops

BOS6:48 pmBoston Logan Intl

$413

Iberia

Feb 18

BOS3:49 pmBoston Logan Intl

14h 56m

2 stops

OPO11:45 amPorto

Mar 1

OPO8:20 amPorto

16h 30m

1 stop

BOS7:50 pmBoston Logan Intl

$432

Fly from

Fly to

Route

Depart

Return

Price

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 3/29

10:45 pm-3:30 pm

1 stop11h 45m

Porto

Mon 4/6

10:35 pm-2:40 pm

1 stop21h 05m

$364

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Mon 2/23

6:27 pm-9:30 am

1 stop10h 03m

Porto

Thu 3/12

12:35 pm-9:41 pm

1 stop13h 06m

$367

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Mon 2/23

6:27 pm-9:30 am

1 stop10h 03m

Porto

Thu 3/12

12:35 pm-11:57 pm

2 stops15h 22m

$368

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 2/18

9:50 pm-11:10 am

1 stop32h 20m

Porto

Tue 3/3

12:05 pm-8:20 pm

1 stop13h 15m

$369

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 2/18

9:50 pm-11:10 am

1 stop32h 20m

Porto

Tue 2/24

7:25 pm-8:20 pm

1 stop29h 55m

$370

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Mon 2/23

6:27 pm-9:30 am

1 stop10h 03m

Porto

Thu 3/12

12:35 pm-11:57 pm

2 stops15h 22m

$371

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 2/18

4:35 pm-6:35 pm

2 stops21h 00m

Porto

Tue 2/24

7:25 pm-9:32 am

2 stops43h 07m

$373

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 3/4

11:34 am-7:40 am

2 stops15h 06m

Porto

Wed 3/11

12:25 pm-8:50 pm

1 stop12h 25m

$374

PortlandPorto

PWM - OPO

PWMOPO

Portland

Mon 3/30

12:51 pm-3:25 pm

2 stops21h 34m

Porto

Tue 4/7

5:00 am-11:59 pm

2 stops23h 59m

$662

PortlandPorto

PWM - OPO

PWMOPO

Portland

Wed 2/25

3:05 pm-9:30 am

1 stop13h 25m

Porto

Wed 3/11

12:35 pm-11:04 pm

1 stop14h 29m

$710

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from 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 is the cheapest airline that flies from Maine to Porto?

Lufthansa, Delta, and KLM are the most popular carriers operating from Maine to Porto

Cheap Maine to Porto flight deals and tips

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

Fastest flight time	6h 40m
Direct flights	Mon, Tue, Thu and Sun
Airports in Porto	1 airport

The fastest flight from Maine to Porto takes 6h 40m

Direct flights go from Maine to Porto on Monday, Tuesday, Thursday and Sunday. There are no airlines offering direct flights.

There is 1 airport in Porto. From Maine there are direct flights to Porto (OPO).

Search flight deals

When did momondo last update prices for flights from Maine to Porto Airport?
Prices for flights from Maine to Porto Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Maine to Porto Airport?
As of February 2026, there are 11 operators available to choose from for flights from Maine to Porto Airport.
How old do you have to be to fly from Maine to Porto Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Maine to Porto Airport.
What documentation or ID do you need to fly to Porto Airport?
The travel and health documents you'll need for your trip to Porto Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Porto Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Vila Nova de Gaia

Coimbra

Braga

Aveiro

Matosinhos

Esposende

Lamego

Guimarães

Espinho

Chaves

Pinhao

Arcos de Valdevez

Viseu

Ponte de Lima

Curia

Penafiel

Mesao Frio

Mira

Baiao

Why use momondo?

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

Finding the right flight to Porto from Maine is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Porto quick and easy, saving you time and money.

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

momondo does allow users to show only those flights to Porto from Maine which offer a flexible booking policy as well as other useful filters and features.

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

Once you have performed a search for Maine to Porto flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

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

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Sun 3/8

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Nearby airports

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Airports servicing Portugal

Faro Airport

Lisbon Humberto Delgado Airport

Azores Airport

Madeira Airport

Algarve Airport

Cheap flights from Maine to Porto from $236

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Maine to Porto departing on 5/5. 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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United Airlines flights from Maine to Porto

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How to get the cheapest flight ticket from Maine to Porto

What is the cheapest airline that flies from Maine to Porto?

Lufthansa, Delta, and KLM are the most popular carriers operating from Maine to Porto

Cheap Maine to Porto flight deals and tips

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

Fastest flight time

Direct flights

Airports in Porto

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

How many operators does momondo search for flights from Maine to Porto Airport?

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

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

Traveling to a place near Porto?

Why use momondo?

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

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

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

I’m not ready to book a flight from Maine to Porto right now. Can momondo alert me if 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.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Portugal

Airports servicing Portugal

Cabin classes currently available on flights to Porto

List of cabin classes available on flights landing in Porto. Availability may vary depending on flight origin and airline.

Popular cities in Portugal

Popular flights according to clicks in the last 7 days on momondo

Fly to other destinations from Maine

According to popular flight searches on momondo this year

Complete your trip to Porto

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According to popular flight searches on momondo this year