Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Maine to Portugal from $218

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 Portugal departing on 5/4. 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

Discover deals from 900+ travel sites with momondo.

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 Maine to Portugal

Cheap round-trip flights

Enter your travel dates to find the best prices.
TAP AIR PORTUGAL Logo
10:45 pm - 6:05 pm
BOS
-
OPO
14h 20m1 stop
TAP AIR PORTUGAL Logo
9:55 am - 8:10 pm
OPO
-
BOS
15h 15m1 stop
$384TAP AIR PORTUGAL
Sun, Feb 1 - Sun, Feb 8
United Airlines Logo
7:57 pm - 9:30 am
BOS
-
OPO
9h 33m1 stop
United Airlines Logo
12:35 pm - 8:15 pm
OPO
-
BOS
11h 40m1 stop
$385United Airlines
Sun, Mar 8 - Wed, Mar 18
Multiple Airlines Logo
9:20 pm - 4:00 pm
BOS
-
OPO
13h 40m1 stop
Multiple Airlines Logo
8:40 pm - 3:15 pm
OPO
-
BOS
23h 35m1 stop
$386Multiple Airlines
Sun, Jan 25 - Tue, Feb 3
TAP AIR PORTUGAL Logo
6:30 pm - 9:00 am
BOS
-
OPO
9h 30m1 stop
TAP AIR PORTUGAL Logo
11:55 am - 8:25 pm
OPO
-
BOS
13h 30m1 stop
$388TAP AIR PORTUGAL
Sun, Mar 29 - Fri, Apr 10
United Airlines Logo
11:02 am - 9:30 am
BOS
-
OPO
18h 28m2 stops
United Airlines Logo
12:35 pm - 11:57 pm
OPO
-
BOS
15h 22m2 stops
$389United Airlines
Sun, Mar 8 - Tue, Mar 17
Multiple Airlines Logo
12:04 pm - 7:40 am
BOS
-
OPO
14h 36m2 stops
Multiple Airlines Logo
8:40 pm - 3:15 pm
OPO
-
BOS
23h 35m1 stop
$390Multiple Airlines
Tue, Feb 17 - Tue, Feb 24
Lufthansa Logo
2:20 pm - 1:15 pm
BOS
-
OPO
17h 55m2 stops
Lufthansa Logo
1:45 pm - 6:57 pm
OPO
-
BOS
34h 12m2 stops
$391Lufthansa
Wed, Jan 14 - Wed, Jan 21
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
$394SWISS
Tue, Jan 13 - Thu, Jan 22
KLM Logo
6:30 pm - 10:30 am
BOS
-
OPO
11h 00m1 stop
KLM Logo
4:10 pm - 6:55 pm
OPO
-
BOS
31h 45m1 stop
$395KLM
Tue, Feb 10 - Tue, Feb 24
KLM Logo
7:10 pm - 6:25 pm
BOS
-
FAO
18h 15m1 stop
KLM Logo
9:15 am - 1:20 pm
FAO
-
BOS
33h 05m1 stop
$526KLM
Sun, Feb 15 - Sat, Feb 28

British Airways flights from Maine to Portugal

Our best British Airways deals on Maine to Portugal flight tickets
British Airways
Mar 2
BOS2:20 pmBoston Logan Intl
13h 45m
1 stop
LIS9:05 amLisbon Humberto Delgado
Mar 8
LIS7:05 amLisbon Humberto Delgado
19h 43m
2 stops
BOS10:48 pmBoston Logan Intl
$542
Find similar
British Airways
Mar 6
BOS7:30 amBoston Logan Intl
29h 25m
1 stop
LIS5:55 pmLisbon Humberto Delgado
Mar 13
LIS6:45 pmLisbon Humberto Delgado
30h 00m
1 stop
BOS8:45 pmBoston Logan Intl
$552
Find similar
British Airways
Dec 13
BOS7:15 pmBoston Logan Intl
19h 00m
1 stop
OPO7:15 pmPorto
Dec 24
OPO12:25 pmPorto
31h 50m
1 stop
BOS3:15 pmBoston Logan Intl
$611
Find similar

Air France flights from Maine to Portugal

Our best Air France deals on Maine to Portugal flight tickets
Air France
Apr 26
PWM2:35 pmPortland
12h 25m
1 stop
LIS8:00 amLisbon Humberto Delgado
May 2
LIS6:50 pmLisbon Humberto Delgado
24h 04m
2 stops
PWM1:54 pmPortland
$898
Find similar
Air France
Dec 16
BOS8:35 pmBoston Logan Intl
6h 25m
LIS8:00 amLisbon Humberto Delgado
Dec 22
LIS6:30 pmLisbon Humberto Delgado
24h 05m
1 stop
BOS1:35 pmBoston Logan Intl
$1,638
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Maine to Portugal 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 11, 2025.
Use the filters below to find and compare flights from Maine to Portugal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 2/1

10:45 pm-6:05 pm

1 stop14h 20m

Porto

Sun 2/8

9:55 am-8:10 pm

1 stop15h 15m

$384

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 3/8

7:57 pm-9:30 am

1 stop9h 33m

Porto

Wed 3/18

12:35 pm-8:15 pm

1 stop11h 40m

$385

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 1/25

9:20 pm-4:00 pm

1 stop13h 40m

Porto

Tue 2/3

8:40 pm-3:15 pm

1 stop23h 35m

$386

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 3/29

6:30 pm-9:00 am

1 stop9h 30m

Porto

Fri 4/10

11:55 am-8:25 pm

1 stop13h 30m

$388

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 3/8

11:02 am-9:30 am

2 stops18h 28m

Porto

Tue 3/17

12:35 pm-11:57 pm

2 stops15h 22m

$389

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Tue 2/17

12:04 pm-7:40 am

2 stops14h 36m

Porto

Tue 2/24

8:40 pm-3:15 pm

1 stop23h 35m

$390

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 1/14

2:20 pm-1:15 pm

2 stops17h 55m

Porto

Wed 1/21

1:45 pm-6:57 pm

2 stops34h 12m

$391

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Tue 1/13

10:10 pm-11:15 am

1 stop32h 05m

Porto

Thu 1/22

12:05 pm-8:20 pm

1 stop13h 15m

$394

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Tue 2/10

6:30 pm-10:30 am

1 stop11h 00m

Porto

Tue 2/24

4:10 pm-6:55 pm

1 stop31h 45m

$395

BostonFaro

BOS - FAO

BOSFAO

Boston Logan Intl

Sun 2/15

7:10 pm-6:25 pm

1 stop18h 15m

Faro

Sat 2/28

9:15 am-1:20 pm

1 stop33h 05m

$526

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Portugal from

How to get the cheapest flight ticket from Maine to Portugal

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 Portugal?

The cheapest month to fly to Portugal from Maine is in November. Flight prices, which tend to average around $640, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of November, then book flights to Portugal from Maine during February instead. Flights to Portugal in February, while not as cheap as those in November, still average around $646.

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

According to our data, Sunday is the cheapest day to fly to Portugal from Maine. The lowest ticket price found for a Sunday departure recently was $681. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Portugal is Thursday, with ticket prices averaging around $1,357.

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

Our most recent data shows that the best time of day to fly to Portugal is in the evening. Flights from Maine to Portugal during this time can be as low as $722. In the afternoon is when there is more demand to fly to Portugal, so prices are often more expensive at around $1,096 per ticket.

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

You are more likely to see cheaper flights to Portugal from Maine when booking weeks ahead of your departure date. In general, you can expect to find flights to Portugal for around $776 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portugal from Maine for as low as $713 on momondo.

Cheap Maine to Portugal flight deals and tips

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

Fastest flight time

4h 55m

Direct flights

Every day

Airports in Portugal

99 airports
The fastest flight from Maine to Portugal takes 4h 55m
Direct flights go from Maine to Portugal every day.
There are 99 airports in Portugal. From Maine there are direct flights to Lisbon Humberto Delgado (LIS), Ponta Delgada Nordela (PDL).
Search flight deals

  • When did momondo last update prices for flights from Maine to Portugal?

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

  • How many operators does momondo search for flights from Maine to Portugal?

  • How old do you have to be to fly from Maine to Portugal?

    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 Portugal.

  • What documentation or ID do you need to fly to Portugal?

    The travel and health documents you'll need for your trip to Portugal 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 Portugal. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Maine to Portugal

Compare and see reviews for airlines that fly from Maine to Portugal with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $578Free CancellationRating
7.4
9,095 reviews
Search United Airlines flights

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Maine to Portugal. Millions of users trust and use momondo every year so you are in good hands.

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

momondo does allow users to show only those flights to Portugal 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 Portugal?

Once you have performed a search for Maine to Portugal 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 Portugal right now. Can momondo alert me if prices change?

Price alerts on flights to Portugal from Maine are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Portugal 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
Sat 1/10
Sat 1/17
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Portugal

Popular cities in Portugal

Popular flights according to clicks in the last 7 days on momondo
Flights to Lisbonfrom $366
Flights to Portofrom $346
Flights to Funchalfrom $418
Flights to Farofrom $409
Flights to Ponta Delgadafrom $403
Flights to Lajesfrom $484
Flights to Hortafrom $576
Flights to Pico Islandfrom $561
Flights to Porto Santofrom $554
Flights to Velasfrom $612