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Cheap flights from Maine to Porto from $211

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 10/18. 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
1 adult, Economy, 0 bags

Find the cheapest flights from Maine to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
TAP AIR PORTUGAL Logo
6:05 pm - 7:00 pmBOS  Boston Logan Intl-OPO Porto
19h 55m1 stop Lisbon Humberto Delgado
TAP AIR PORTUGAL Logo
9:00 am - 8:20 pmOPO  Porto-BOS Boston Logan Intl
16h 20m1 stop Lisbon Humberto Delgado
$638TAP AIR PORTUGAL
Sun, Sep 6 - Wed, Sep 16
TAP AIR PORTUGAL Logo
10:45 pm - 7:00 pmBOS  Boston Logan Intl-OPO Porto
15h 15m1 stop Lisbon Humberto Delgado
TAP AIR PORTUGAL Logo
6:00 pm - 2:45 pmOPO  Porto-BOS Boston Logan Intl
25h 45m1 stop Lisbon Humberto Delgado
$638TAP AIR PORTUGAL
Sat, Oct 3 - Tue, Oct 13
Multiple Airlines Logo
5:40 pm - 9:45 amBOS  Boston Logan Intl-OPO Porto
11h 05m1 stop Madrid Barajas
Multiple Airlines Logo
2:05 pm - 9:05 pmOPO  Porto-BOS Boston Logan Intl
12h 00m1 stop Barcelona-El Prat
$639Multiple Airlines
Thu, Oct 8 - Wed, Oct 21
Iberia Logo
12:29 pm - 7:40 amBOS  Boston Logan Intl-OPO Porto
14h 11m2 stops New York John F Kennedy Intl Madrid Barajas
Iberia Logo
12:25 pm - 6:25 pmOPO  Porto-BOS Boston Logan Intl
11h 00m1 stop Madrid Barajas
$642Iberia
Wed, Oct 14 - Thu, Nov 12
Iberia Logo
12:29 pm - 7:40 amBOS  Boston Logan Intl-OPO Porto
14h 11m2 stops New York John F Kennedy Intl Madrid Barajas
Iberia Logo
8:20 am - 6:25 pmOPO  Porto-BOS Boston Logan Intl
15h 05m1 stop Madrid Barajas
$642Iberia
Wed, Oct 14 - Tue, Nov 17
Multiple Airlines Logo
8:55 pm - 12:20 pmBOS  Boston Logan Intl-OPO Porto
10h 25m1 stop Madrid Barajas
Multiple Airlines Logo
2:05 pm - 9:05 pmOPO  Porto-BOS Boston Logan Intl
12h 00m1 stop Barcelona-El Prat
$642Multiple Airlines
Fri, Oct 2 - Wed, Oct 21
United Airlines Logo
6:50 pm - 7:00 amBOS  Boston Logan Intl-OPO Porto
31h 10m1 stop Montreal Pierre Elliott Trudeau Intl
United Airlines Logo
12:35 pm - 3:50 pmOPO  Porto-BOS Boston Logan Intl
32h 15m1 stop Newark
$654United Airlines
Mon, Oct 12 - Wed, Nov 18
United Airlines Logo
6:50 pm - 7:00 amBOS  Boston Logan Intl-OPO Porto
31h 10m1 stop Montreal Pierre Elliott Trudeau Intl
United Airlines Logo
12:35 pm - 1:31 pmOPO  Porto-BOS Boston Logan Intl
29h 56m1 stop Newark
$654United Airlines
Mon, Oct 12 - Fri, Nov 20
Delta Logo
9:15 pm - 9:05 amBOS  Boston Logan Intl-OPO Porto
30h 50m1 stop New York John F Kennedy Intl
Delta Logo
11:00 am - 7:20 amOPO  Porto-BOS Boston Logan Intl
25h 20m1 stop New York John F Kennedy Intl
$655Delta
Tue, Nov 24 - Thu, Dec 3
Delta Logo
9:10 am - 10:30 amBOS  Boston Logan Intl-OPO Porto
20h 20m1 stop New York John F Kennedy Intl
Delta Logo
11:15 am - 7:01 pmOPO  Porto-BOS Boston Logan Intl
12h 46m1 stop Amsterdam Schiphol
$660Delta
Wed, Oct 14 - Fri, Nov 13

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TAP AIR PORTUGAL flights from Maine to Porto

Our best TAP AIR PORTUGAL deals on Maine to Porto flight tickets
TAP AIR PORTUGAL
Aug 23
BOS10:40 pmBoston Logan Intl
11h 35m
1 stop
OPO3:15 pmPorto
Oct 27
OPO5:50 pmPorto
7h 55m
BOS9:45 pmBoston Logan Intl
$638
TAP AIR PORTUGAL
Nov 27
BOS6:00 pmBoston Logan Intl
11h 00m
1 stop
OPO10:00 amPorto
Dec 3
OPO2:30 pmPorto
10h 25m
1 stop
BOS7:55 pmBoston Logan Intl
$640
TAP AIR PORTUGAL
Nov 26
BOS6:00 pmBoston Logan Intl
12h 00m
1 stop
OPO11:00 amPorto
Dec 4
OPO2:30 pmPorto
10h 25m
1 stop
BOS7:55 pmBoston Logan Intl
$641

United Airlines flights from Maine to Porto

Our best United Airlines deals on Maine to Porto flight tickets
United Airlines
Oct 12
BOS6:50 pmBoston Logan Intl
31h 10m
1 stop
OPO7:00 amPorto
Nov 18
OPO12:35 pmPorto
32h 15m
1 stop
BOS3:50 pmBoston Logan Intl
$654
United Airlines
Nov 29
BOS10:30 amBoston Logan Intl
18h 00m
1 stop
OPO9:30 amPorto
Dec 8
OPO12:35 pmPorto
25h 09m
1 stop
BOS8:44 amBoston Logan Intl
$655
United Airlines
Oct 12
BOS6:50 pmBoston Logan Intl
31h 10m
1 stop
OPO7:00 amPorto
Nov 18
OPO12:35 pmPorto
16h 24m
2 stops
BOS11:59 pmBoston Logan Intl
$659

momondo Fare Finder

 
Customize your flight search to find flights from 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 12, 2026.
Use the filters below to find and compare flights from Maine to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BostonPorto

BOS Boston Logan Intl - OPO Porto

BOSOPO

Boston Logan Intl

Sun 9/6

6:05 pm-7:00 pm

1 stop19h 55m

Porto

Wed 9/16

9:00 am-8:20 pm

1 stop16h 20m

$638

BostonPorto

BOS Boston Logan Intl - OPO Porto

BOSOPO

Boston Logan Intl

Sat 10/3

10:45 pm-7:00 pm

1 stop15h 15m

Porto

Tue 10/13

6:00 pm-2:45 pm

1 stop25h 45m

$638

BostonPorto

BOS Boston Logan Intl - OPO Porto

BOSOPO

Boston Logan Intl

Thu 10/8

5:40 pm-9:45 am

1 stop11h 05m

Porto

Wed 10/21

2:05 pm-9:05 pm

1 stop12h 00m

$639

BostonPorto

BOS Boston Logan Intl - OPO Porto

BOSOPO

Boston Logan Intl

Wed 10/14

12:29 pm-7:40 am

2 stops14h 11m

Porto

Thu 11/12

12:25 pm-6:25 pm

1 stop11h 00m

$642

BostonPorto

BOS Boston Logan Intl - OPO Porto

BOSOPO

Boston Logan Intl

Wed 10/14

12:29 pm-7:40 am

2 stops14h 11m

Porto

Tue 11/17

8:20 am-6:25 pm

1 stop15h 05m

$642
Quickest round-trip

BostonPorto

BOS Boston Logan Intl - OPO Porto

BOSOPO

Boston Logan Intl

Fri 10/2

8:55 pm-12:20 pm

1 stop10h 25m

Porto

Wed 10/21

2:05 pm-9:05 pm

1 stop12h 00m

$642

BostonPorto

BOS Boston Logan Intl - OPO Porto

BOSOPO

Boston Logan Intl

Mon 10/12

6:50 pm-7:00 am

1 stop31h 10m

Porto

Wed 11/18

12:35 pm-3:50 pm

1 stop32h 15m

$654

BostonPorto

BOS Boston Logan Intl - OPO Porto

BOSOPO

Boston Logan Intl

Mon 10/12

6:50 pm-7:00 am

1 stop31h 10m

Porto

Fri 11/20

12:35 pm-1:31 pm

1 stop29h 56m

$654

BostonPorto

BOS Boston Logan Intl - OPO Porto

BOSOPO

Boston Logan Intl

Tue 11/24

9:15 pm-9:05 am

1 stop30h 50m

Porto

Thu 12/3

11:00 am-7:20 am

1 stop25h 20m

$655

BostonPorto

BOS Boston Logan Intl - OPO Porto

BOSOPO

Boston Logan Intl

Wed 10/14

9:10 am-10:30 am

1 stop20h 20m

Porto

Fri 11/13

11:15 am-7:01 pm

1 stop12h 46m

$660

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 Porto from

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?

LEVEL, Azores Airlines, and TAP AIR PORTUGAL 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 30m

Direct flights

Mon, Tue, Thu and Sun

Airports in Porto

1 airport
The fastest flight from Maine to Porto takes 6h 30m
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

Frequently asked questions about flying from Maine to Porto

  • 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?

  • 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.

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
Pinhao
Esposende
Chaves
Arcos de Valdevez
Viseu
Guimarães
Espinho
Lamego
Ponte de Lima
Mesao Frio
Penafiel
Caminha
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

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