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Cheap flights from Maine to Porto from $309

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 8/29. 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

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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.
KLM Logo
3:34 pm - 8:05 am
BOS
-
OPO
12h 31m
1 stop
KLM Logo
11:00 am - 10:26 pm
OPO
-
BOS
16h 26m
1 stop
$646KLM
Fri, Oct 30 - Thu, Nov 5
United Airlines Logo
5:45 am - 7:00 am
BOS
-
OPO
20h 15m
1 stop
United Airlines Logo
2:25 pm - 9:50 am
OPO
-
BOS
24h 25m
1 stop
$648United Airlines
Mon, Aug 10 - Wed, Aug 19
Multiple Airlines Logo
5:45 am - 7:00 am
BOS
-
OPO
20h 15m
1 stop
Multiple Airlines Logo
8:40 am - 3:10 pm
OPO
-
BOS
11h 30m
1 stop
$649Multiple Airlines
Mon, Jul 6 - Fri, Sep 4
Scandinavian Airlines Logo
5:40 pm - 5:05 pm
BOS
-
OPO
18h 25m
1 stop
Scandinavian Airlines Logo
5:55 pm - 3:35 pm
OPO
-
BOS
26h 40m
1 stop
$650Scandinavian Airlines
Sat, Aug 15 - Fri, Aug 21
United Airlines Logo
9:50 am - 9:30 am
BOS
-
OPO
18h 40m
2 stops
United Airlines Logo
12:35 pm - 1:02 am
OPO
-
BOS
17h 27m
2 stops
$651United Airlines
Tue, Nov 3 - Mon, Nov 9
Multiple Airlines Logo
9:35 am - 6:50 am
BOS
-
OPO
16h 15m
2 stops
Multiple Airlines Logo
9:10 am - 8:20 pm
OPO
-
BOS
16h 10m
2 stops
$654Multiple Airlines
Sun, Jul 12 - Tue, Nov 10
United Airlines Logo
3:35 pm - 7:00 am
BOS
-
OPO
10h 25m
1 stop
United Airlines Logo
9:00 am - 9:59 pm
OPO
-
BOS
17h 59m
1 stop
$655United Airlines
Tue, Jul 28 - Fri, Aug 28
United Airlines Logo
6:00 am - 9:30 am
BOS
-
OPO
23h 30m
1 stop
United Airlines Logo
12:35 pm - 11:54 pm
OPO
-
BOS
16h 19m
2 stops
$656United Airlines
Fri, Oct 30 - Thu, Nov 5
Air Canada Logo
12:30 pm - 7:00 am
BOS
-
OPO
13h 30m
2 stops
Air Canada Logo
12:45 pm - 8:44 am
OPO
-
BOS
24h 59m
2 stops
$657Air Canada
Mon, Oct 12 - Wed, Oct 21
Multiple Airlines Logo
12:30 pm - 7:00 am
BOS
-
OPO
13h 30m
2 stops
Multiple Airlines Logo
8:40 am - 7:55 pm
OPO
-
BOS
16h 15m
1 stop
$658Multiple Airlines
Mon, Jul 6 - Fri, Sep 4

Scandinavian Airlines flights from Maine to Porto

Our best Scandinavian Airlines deals on Maine to Porto flight tickets
Scandinavian Airlines
Aug 15
BOS5:40 pmBoston Logan Intl
18h 25m
1 stop
OPO5:05 pmPorto
Aug 21
OPO5:55 pmPorto
26h 40m
1 stop
BOS3:35 pmBoston Logan Intl
$650
Scandinavian Airlines
Oct 22
BOS5:50 pmBoston Logan Intl
18h 15m
1 stop
OPO5:05 pmPorto
Oct 29
OPO5:50 pmPorto
26h 50m
1 stop
BOS4:40 pmBoston Logan Intl
$659

TAP AIR PORTUGAL flights from Maine to Porto

Our best TAP AIR PORTUGAL deals on Maine to Porto flight tickets
TAP AIR PORTUGAL
Oct 14
BOS6:05 pmBoston Logan Intl
11h 05m
1 stop
OPO10:10 amPorto
Oct 18
OPO9:00 amPorto
16h 20m
1 stop
BOS8:20 pmBoston Logan Intl
$675
TAP AIR PORTUGAL
Oct 21
BOS11:15 pmBoston Logan Intl
6h 30m
OPO10:45 amPorto
Oct 25
OPO8:30 amPorto
11h 10m
1 stop
BOS3:40 pmBoston Logan Intl
$677
TAP AIR PORTUGAL
Oct 14
BOS11:15 pmBoston Logan Intl
6h 30m
OPO10:45 amPorto
Nov 18
OPO8:30 amPorto
11h 10m
1 stop
BOS2:40 pmBoston Logan Intl
$680

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 May 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 - OPO

BOSOPO

Boston Logan Intl

Fri 10/30

3:34 pm-8:05 am

1 stop12h 31m

Porto

Thu 11/5

11:00 am-10:26 pm

1 stop16h 26m

$646

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Mon 8/10

5:45 am-7:00 am

1 stop20h 15m

Porto

Wed 8/19

2:25 pm-9:50 am

1 stop24h 25m

$648

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Mon 7/6

5:45 am-7:00 am

1 stop20h 15m

Porto

Fri 9/4

8:40 am-3:10 pm

1 stop11h 30m

$649

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sat 8/15

5:40 pm-5:05 pm

1 stop18h 25m

Porto

Fri 8/21

5:55 pm-3:35 pm

1 stop26h 40m

$650

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Tue 11/3

9:50 am-9:30 am

2 stops18h 40m

Porto

Mon 11/9

12:35 pm-1:02 am

2 stops17h 27m

$651

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 7/12

9:35 am-6:50 am

2 stops16h 15m

Porto

Tue 11/10

9:10 am-8:20 pm

2 stops16h 10m

$654
Quickest round-trip

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Tue 7/28

3:35 pm-7:00 am

1 stop10h 25m

Porto

Fri 8/28

9:00 am-9:59 pm

1 stop17h 59m

$655

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Fri 10/30

6:00 am-9:30 am

1 stop23h 30m

Porto

Thu 11/5

12:35 pm-11:54 pm

2 stops16h 19m

$656

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Mon 10/12

12:30 pm-7:00 am

2 stops13h 30m

Porto

Wed 10/21

12:45 pm-8:44 am

2 stops24h 59m

$657

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Mon 7/6

12:30 pm-7:00 am

2 stops13h 30m

Porto

Fri 9/4

8:40 am-7:55 pm

1 stop16h 15m

$658

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?

Azores Airlines is the most popular carrier 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
Lamego
Esposende
Chaves
Pinhao
Espinho
Guimarães
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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