HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Portugal

$297+ Cheap flights from Maine to Portugal

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/4. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — LIS
Jun 17 — Jun 241
Wed 6/17
Wed 6/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Maine to Portugal with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Maine to Portugal

Cheapest flights from Maine to Portugal
Explore the most affordable flight options available from Maine to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 18, 2026.

This Kiwi.com deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2310:55 pm
BOS
-
FAO
1 stop14h 10m
Multiple Airlines
Wed 9/306:45 am
FAO
-
BOS
2 stops19h 20m
Multiple Airlines
Deal found 5/13$544
This Kiwi.com deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2210:55 pm
BOS
-
FAO
1 stop14h 10m
Multiple Airlines
Wed 8/126:45 am
FAO
-
BOS
2 stops19h 20m
Multiple Airlines
Deal found 5/16$573
This Kiwi.com deal was found by Cheapflights users on 5/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/2311:35 pm
BOS
-
FAO
1 stop18h 10m
Multiple Airlines
Wed 8/126:45 am
FAO
-
BOS
2 stops19h 20m
Multiple Airlines
Deal found 5/16$609
This Gotogate deal was found by Cheapflights users on 5/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2610:25 pm
BOS
-
TER
Nonstop4h 55m
Azores Airlines
Tue 11/35:50 pm
TER
-
BOS
Nonstop6h 10m
Azores Airlines
Deal found 5/17$639
This Kiwi.com deal was found by Cheapflights users on 5/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/128:50 pm
BOS
-
OPO
2 stops13h 45m
Multiple Airlines
Wed 9/1610:00 pm
OPO
-
BOS
1 stop28h 05m
Multiple Airlines
Deal found 5/15$649
This FlightHub deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/185:30 am
BOS
-
OPO
2 stops24h 45m
Multiple Airlines
Mon 11/237:20 pm
OPO
-
BOS
1 stop30h 00m
Multiple Airlines
Deal found 5/13$650
This Gotogate deal was found by Cheapflights users on 5/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/267:00 pm
BOS
-
TER
1 stop13h 00m
Multiple Airlines
Tue 11/35:50 pm
TER
-
BOS
Nonstop6h 10m
Multiple Airlines
Deal found 5/17$650
This Kiwi.com deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/1211:35 pm
BOS
-
OPO
1 stop26h 35m
Multiple Airlines
Sun 7/191:15 pm
OPO
-
BOS
1 stop13h 30m
Multiple Airlines
Deal found 5/14$652
This Gotogate deal was found by Cheapflights users on 5/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/229:25 pm
BOS
-
TER
1 stop12h 55m
Multiple Airlines
Sat 11/286:55 am
TER
-
BOS
1 stop17h 05m
Multiple Airlines
Deal found 5/17$652
This FlightHub deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/155:30 am
BOS
-
OPO
2 stops24h 45m
Multiple Airlines
Wed 12/27:20 pm
OPO
-
BOS
2 stops43h 17m
Multiple Airlines
Deal found 5/13$653
This oojo deal was found by Cheapflights users on 5/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/46:00 pm
BOS
-
OPO
1 stop12h 00m
TAP AIR PORTUGAL
Mon 11/96:00 pm
OPO
-
BOS
1 stop25h 40m
TAP AIR PORTUGAL
Deal found 5/17$654
This Kiwi.com deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/810:55 pm
BOS
-
OPO
1 stop27h 00m
Multiple Airlines
Sat 7/1810:05 pm
OPO
-
BOS
1 stop28h 40m
Multiple Airlines
Deal found 5/14$655

Find flight deals from Maine to Portugal

Keep the following information in mind while searching for Maine to Portugal flight deals. Data was last updated May 18, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$544
(Kiwi.com)

One-way from

$297
(Mytrip)

Popular in

December

Cheapest in

February
Provider with most accurate pricing for Portland-Lisbon Humberto Delgado flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Lisbon Humberto Delgado flights.
Search Deals
From Maine to Portugal
Search Deals
One-way flight from Maine to Portugal
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($133 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 14% potential price decrease ($126 potential savings vs. average RT price).
Search Deals

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated May 18, 2026.
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

Cheapest round-trip

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 7/19

6:50 pm-7:00 am

1 stop31h 10m

Porto

Tue 9/1

12:15 pm-5:52 pm

2 stops34h 37m

$675

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Fri 10/30

6:35 pm-11:10 am

1 stop12h 35m

Porto

Thu 11/5

5:50 pm-10:26 pm

2 stops33h 36m

$677

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 7/5

10:40 am-6:50 am

1 stop15h 10m

Porto

Wed 8/19

2:25 pm-2:41 pm

1 stop29h 16m

$688

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-9:24 am

2 stops25h 49m

$696

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 6/7

11:30 pm-4:10 pm

1 stop11h 40m

Porto

Tue 6/9

10:00 pm-9:00 pm

1 stop28h 00m

$714

BostonLajes

BOS - TER

BOSTER

Boston Logan Intl

Sun 10/18

6:05 pm-12:50 pm

1 stop14h 45m

Lajes

Thu 10/29

11:50 am-8:55 pm

1 stop12h 05m

$732

BostonFaro

BOS - FAO

BOSFAO

Boston Logan Intl

Wed 9/23

8:25 pm-8:00 am

1 stop30h 35m

Faro

Wed 9/30

8:20 pm-4:36 pm

1 stop25h 16m

$737

BostonLajes

BOS - TER

BOSTER

Boston Logan Intl

Tue 10/20

6:05 pm-12:50 pm

1 stop14h 45m

Lajes

Sat 10/31

6:40 am-3:40 pm

1 stop12h 00m

$752

BostonLajes

BOS - TER

BOSTER

Boston Logan Intl

Wed 10/14

6:05 pm-12:55 pm

1 stop14h 50m

Lajes

Sun 10/25

6:40 am-3:40 pm

1 stop12h 00m

$752

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Tue 11/10

9:10 am-8:10 am

1 stop18h 00m

Lisbon Humberto Delgado

Thu 11/12

1:00 pm-9:27 pm

2 stops37h 27m

$775

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/14

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

Best time to book a flight from Maine to Portugal

Have a flexible travel schedule? Discover the best time to fly to Portugal from Maine with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Maine to Portugal
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Maine to Portugal. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Maine to Portugal?

    For as low as $714, United Airlines can have you in Portugal from Maine in 11h 40m. Maine and Portugal are separated by a distance of 3134 mi. This flight may include one or multiple stops.

  • Can I find deals for flights from Maine to Portugal that include hotel bookings?

    Yes. In addition to deals on Maine to Portugal flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Maine to Portugal?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Maine to Portugal.

  • Can I find deals for business class flights from Maine to Portugal?

    Yes. Cheapflights offers flight deals from Maine to Portugal by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Maine to Portugal

See prices for flight routes from nearby airports that may be better suited for you.
Newark to Heathrow flights
John F Kennedy Intl to Heathrow flights
John F Kennedy Intl to Charles de Gaulle flights
Newark to Charles de Gaulle flights
John F Kennedy Intl to Leonardo da Vinci/Fiumicino flights
LaGuardia to Heathrow flights
Newark to Leonardo da Vinci/Fiumicino flights
Newark to Gatwick flights
John F Kennedy Intl to Gatwick flights
John F Kennedy Intl to London City flights
Newark to Athens flights
Dulles Intl to Heathrow flights
Boston to Heathrow flights
John F Kennedy Intl to Istanbul flights
LaGuardia to Gatwick flights
Los Angeles to Heathrow flights
Newark to Orly flights
Newark to Barcelona-El Prat flights
John F Kennedy Intl to Dublin flights
Newark to Dublin flights
Baltimore to Heathrow flights
John F Kennedy Intl to Orly flights
Newark to Madrid flights
John F Kennedy Intl to Athens flights
Newark to Lisbon flights
John F Kennedy Intl to Lisbon flights
John F Kennedy Intl to Barcelona-El Prat flights
Miami to Madrid flights
John F Kennedy Intl to Malpensa flights
Los Angeles to Charles de Gaulle flights
John F Kennedy Intl to Madrid flights
San Francisco to Heathrow flights
Newark to Malpensa flights
Newark to Stansted flights
Los Angeles to Leonardo da Vinci/Fiumicino flights
O'Hare Intl to Heathrow flights
Dallas/Fort Worth to Heathrow flights
Boston to Charles de Gaulle flights
Newark to Luton flights
Boston to Gatwick flights
Seattle to Heathrow flights
John F Kennedy Intl to Frederic Chopin flights
Boston to Dublin flights
Dulles Intl to Charles de Gaulle flights
O'Hare Intl to Leonardo da Vinci/Fiumicino flights
O'Hare Intl to Charles de Gaulle flights

Top airline flying from Maine to Portugal

Discover the top airline that operate flights from Maine to Portugal. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 18, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$550Average$721FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.