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Cheap flights from Maine to Porto from $256

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 3/16. 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 Maine to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
SWISS Logo
10:10 pm - 11:15 am
BOS
-
OPO
32h 05m1 stop
SWISS Logo
12:05 pm - 8:20 pm
OPO
-
BOS
13h 15m1 stop
$384SWISS
Tue, Jan 13 - Thu, Jan 29
TAP AIR PORTUGAL Logo
6:05 pm - 10:00 am
BOS
-
OPO
10h 55m1 stop
TAP AIR PORTUGAL Logo
1:00 pm - 8:10 pm
OPO
-
BOS
12h 10m1 stop
$385TAP AIR PORTUGAL
Sun, Feb 1 - Sat, Feb 7
American Airlines Logo
9:20 pm - 4:00 pm
BOS
-
OPO
13h 40m1 stop
American Airlines Logo
12:25 pm - 10:56 pm
OPO
-
BOS
15h 31m2 stops
$386American Airlines
Sun, Feb 1 - Tue, Feb 10
United Airlines Logo
11:02 am - 9:30 am
BOS
-
OPO
18h 28m2 stops
United Airlines Logo
6:00 am - 3:40 pm
OPO
-
BOS
14h 40m1 stop
$387United Airlines
Tue, Mar 24 - Tue, Mar 31
Multiple Airlines Logo
5:30 am - 11:15 am
BOS
-
OPO
24h 45m2 stops
Multiple Airlines Logo
12:05 pm - 8:20 pm
OPO
-
BOS
13h 15m1 stop
$388Multiple Airlines
Wed, Jan 14 - Tue, Jan 27
TAP AIR PORTUGAL Logo
10:30 pm - 10:10 am
BOS
-
OPO
6h 40mnonstop
TAP AIR PORTUGAL Logo
5:15 pm - 7:55 pm
OPO
-
BOS
7h 40mnonstop
$389TAP AIR PORTUGAL
Wed, Apr 8 - Wed, Apr 15
American Airlines Logo
9:45 am - 7:40 am
BOS
-
OPO
16h 55m2 stops
American Airlines Logo
8:20 am - 11:10 pm
OPO
-
BOS
18h 50m2 stops
$390American Airlines
Mon, Feb 2 - Wed, Mar 11
Iberia Logo
3:35 pm - 11:45 am
BOS
-
OPO
15h 10m2 stops
Iberia Logo
12:25 pm - 10:56 pm
OPO
-
BOS
15h 31m2 stops
$391Iberia
Mon, Jan 12 - Wed, Jan 21
United Airlines Logo
7:57 pm - 9:30 am
BOS
-
OPO
9h 33m1 stop
United Airlines Logo
6:00 am - 1:06 am
OPO
-
BOS
24h 06m2 stops
$392United Airlines
Sun, Mar 22 - Thu, Apr 2
Multiple Airlines Logo
5:30 am - 11:10 am
BOS
-
OPO
24h 40m2 stops
Multiple Airlines Logo
9:10 am - 8:20 pm
OPO
-
BOS
16h 10m2 stops
$393Multiple Airlines
Sun, Jan 25 - Tue, Feb 3

SWISS flights from Maine to Porto

Our best SWISS deals on Maine to Porto flight tickets
SWISS
Jan 13
BOS10:10 pmBoston Logan Intl
32h 05m
1 stop
OPO11:15 amPorto
Jan 29
OPO12:05 pmPorto
13h 15m
1 stop
BOS8:20 pmBoston Logan Intl
$384
Find similar
SWISS
Mar 11
BOS10:50 pmBoston Logan Intl
15h 45m
1 stop
OPO6:35 pmPorto
Mar 24
OPO7:25 pmPorto
29h 55m
1 stop
BOS9:20 pmBoston Logan Intl
$405
Find similar
SWISS
Mar 23
BOS11:10 pmBoston Logan Intl
34h 15m
2 stops
OPO1:25 pmPorto
Apr 2
OPO12:15 pmPorto
12h 40m
1 stop
BOS7:55 pmBoston Logan Intl
$419
Find similar

American Airlines flights from Maine to Porto

Our best American Airlines deals on Maine to Porto flight tickets
American Airlines
Feb 2
BOS9:45 amBoston Logan Intl
16h 55m
2 stops
OPO7:40 amPorto
Mar 11
OPO8:20 amPorto
18h 50m
2 stops
BOS11:10 pmBoston Logan Intl
$390
Find similar
American Airlines
Feb 2
BOS4:45 pmBoston Logan Intl
9h 55m
1 stop
OPO7:40 amPorto
Apr 28
OPO8:20 amPorto
17h 45m
2 stops
BOS9:05 pmBoston Logan Intl
$413
Find similar
American Airlines
Feb 2
BOS9:45 amBoston Logan Intl
16h 55m
2 stops
OPO7:40 amPorto
Apr 28
OPO8:20 amPorto
17h 45m
2 stops
BOS9:05 pmBoston Logan Intl
$417
Find similar

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 December 18, 2025.
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

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Tue 1/13

10:10 pm-11:15 am

1 stop32h 05m

Porto

Thu 1/29

12:05 pm-8:20 pm

1 stop13h 15m

$384

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 2/1

6:05 pm-10:00 am

1 stop10h 55m

Porto

Sat 2/7

1:00 pm-8:10 pm

1 stop12h 10m

$385

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 2/1

9:20 pm-4:00 pm

1 stop13h 40m

Porto

Tue 2/10

12:25 pm-10:56 pm

2 stops15h 31m

$386

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Tue 3/24

11:02 am-9:30 am

2 stops18h 28m

Porto

Tue 3/31

6:00 am-3:40 pm

1 stop14h 40m

$387

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 1/14

5:30 am-11:15 am

2 stops24h 45m

Porto

Tue 1/27

12:05 pm-8:20 pm

1 stop13h 15m

$388

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 4/8

10:30 pm-10:10 am

Nonstop6h 40m

Porto

Wed 4/15

5:15 pm-7:55 pm

Nonstop7h 40m

$389

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Mon 2/2

9:45 am-7:40 am

2 stops16h 55m

Porto

Wed 3/11

8:20 am-11:10 pm

2 stops18h 50m

$390

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Mon 1/12

3:35 pm-11:45 am

2 stops15h 10m

Porto

Wed 1/21

12:25 pm-10:56 pm

2 stops15h 31m

$391

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 3/22

7:57 pm-9:30 am

1 stop9h 33m

Porto

Thu 4/2

6:00 am-1:06 am

2 stops24h 06m

$392

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 1/25

5:30 am-11:10 am

2 stops24h 40m

Porto

Tue 2/3

9:10 am-8:20 pm

2 stops16h 10m

$393

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 month to fly to Porto?

The month of November is, on average, the cheapest month to fly to Porto from Maine, with most prices found around $514. If you aren’t able to travel during the month of November, then book flights to Porto from Maine during February instead. Flights to Porto in February, while not as cheap as those in November, still average around $543.

What is the cheapest day to depart on your flight to Porto?

The cheapest day to depart on your flight to Porto is on a Tuesday when prices can be found for as low as $723. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $837. These prices are subject to change though, so be sure to set up a Price Alert for flights to Porto.

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

At noon is the cheapest time of day to fly from Maine to Porto when you can find flight prices for as low as $724. Flying to Porto at noon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $777 on average. Flights to Porto from Maine in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

How far in advance should I book a flight to Porto?

You are more likely to see cheaper flights to Porto from Maine when booking weeks ahead of your departure date. In general, you can expect to find flights to Porto for around $645 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Porto from Maine for as low as $608 on momondo.

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?

  • 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
Guimarães
Esposende
Lamego
Chaves
Viseu
Espinho
Ponte de Lima
Arcos de Valdevez
Pinhao
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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