How long is the flight from Maine to Portugal?

For as low as $376, United Airlines can have you in Portugal from Maine in 10h 03m. Maine and Portugal are separated by a distance of 3134 mi. This flight may include one or multiple stops.

In terms of precipitation, rainfall in Portugal ranges from 0.2 - 4.8 inches per month. December is typically the wettest month, when rainfall can reach 4.8 in. July is typically the driest time to visit Portugal when rainfall is around 0.2 in.

If weather is an important factor for your trip to Portugal, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

What is the cheapest time of day to fly from ME to PT?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Maine to Portugal as you normally would.

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.

$214+ Flights from Maine to Portugal

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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 January 20, 2026.

Wed 1/289:50 pm

BOS

OPO

1 stop32h 20m

SWISS

Wed 3/47:20 pm

OPO

BOS

1 stop30h 00m

SWISS

Deal found 1/17

$341

Mon 3/3010:30 pm

BOS

OPO

Nonstop6h 40m

TAP AIR PORTUGAL

Sun 4/59:00 am

OPO

BOS

1 stop16h 45m

TAP AIR PORTUGAL

Deal found 1/18

$342

Sun 2/2210:10 pm

BOS

OPO

1 stop32h 05m

SWISS

Mon 3/27:20 pm

OPO

BOS

1 stop30h 00m

SWISS

Deal found 1/18

$347

Thu 1/226:05 pm

BOS

OPO

1 stop11h 55m

TAP AIR PORTUGAL

Mon 2/95:55 pm

OPO

BOS

1 stop25h 50m

TAP AIR PORTUGAL

Deal found 1/18

$351

Mon 3/3010:30 pm

BOS

OPO

Nonstop6h 40m

TAP AIR PORTUGAL

Sun 4/129:15 pm

OPO

BOS

1 stop22h 25m

TAP AIR PORTUGAL

Deal found 1/18

$355

Wed 4/296:05 pm

BOS

OPO

1 stop9h 55m

TAP AIR PORTUGAL

Wed 5/66:10 pm

OPO

BOS

Nonstop7h 35m

TAP AIR PORTUGAL

Deal found 1/18

$356

Tue 5/510:45 pm

BOS

OPO

1 stop15h 15m

TAP AIR PORTUGAL

Tue 5/1212:10 pm

OPO

BOS

1 stop12h 55m

TAP AIR PORTUGAL

Deal found 1/18

$357

Wed 3/48:40 pm

BOS

OPO

1 stop11h 35m

Multiple Airlines

Wed 3/1112:10 pm

OPO

BOS

1 stop13h 10m

Multiple Airlines

Deal found 1/18

$358

Mon 2/238:40 pm

BOS

OPO

1 stop11h 10m

Multiple Airlines

Wed 3/412:10 pm

OPO

BOS

1 stop13h 10m

Multiple Airlines

Deal found 1/19

$359

Wed 1/288:40 pm

BOS

OPO

1 stop11h 35m

Multiple Airlines

Mon 3/27:20 pm

OPO

BOS

1 stop30h 00m

Multiple Airlines

Deal found 1/17

$360

Sun 2/810:10 pm

BOS

OPO

1 stop32h 05m

SWISS

Wed 2/257:20 pm

OPO

BOS

1 stop29h 40m

SWISS

Deal found 1/19

$361

Mon 2/2310:10 pm

BOS

FAO

1 stop15h 00m

SWISS

Tue 3/107:00 pm

FAO

BOS

1 stop30h 20m

SWISS

Deal found 1/19

$386

Best flights from Maine to Portugal
Discover carefully curated flight deals from Maine to Portugal that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated January 20, 2026.

Mon 2/236:27 pm

BOS

OPO

1 stop10h 03m

United Airlines

Wed 3/412:35 pm

OPO

BOS

1 stop12h 36m

United Airlines

Deal found 1/19

$376

Mon 2/2310:10 pm

BOS

FAO

1 stop15h 00m

SWISS

Tue 3/107:00 pm

FAO

BOS

1 stop30h 20m

SWISS

Deal found 1/19

$386

Tue 2/101:00 pm

BOS

OPO

2 stops16h 30m

Delta

Tue 2/245:00 am

OPO

BOS

1 stop13h 25m

Delta

Deal found 1/19

$413

Wed 3/44:25 pm

BOS

FAO

2 stops14h 15m

Multiple Airlines

Wed 3/112:40 pm

FAO

BOS

1 stop34h 40m

Multiple Airlines

Deal found 1/18

$422

Mon 2/167:10 pm

BOS

FAO

1 stop33h 20m

KLM

Mon 2/2310:05 am

FAO

BOS

1 stop32h 20m

KLM

Deal found 1/18

$457

Mon 3/97:05 pm

BOS

FNC

2 stops21h 40m

TAP AIR PORTUGAL

Sun 3/154:10 am

FNC

BOS

1 stop15h 25m

TAP AIR PORTUGAL

Deal found 1/18

$531

Sun 2/229:45 am

BOS

OPO

2 stops18h 45m

United Airlines

Tue 3/1012:35 pm

OPO

BOS

1 stop11h 40m

United Airlines

Deal found 1/17

$380

Tue 2/101:00 pm

BOS

OPO

2 stops16h 30m

Delta

Tue 2/175:00 am

OPO

BOS

1 stop13h 25m

Delta

Deal found 1/18

$413

Mon 2/235:35 am

BOS

OPO

2 stops22h 55m

United Airlines

Tue 3/1012:35 pm

OPO

BOS

1 stop11h 40m

United Airlines

Deal found 1/17

$380

Tue 2/104:15 pm

BOS

OPO

1 stop14h 25m

Multiple Airlines

Tue 2/1712:05 pm

OPO

BOS

1 stop13h 15m

Multiple Airlines

Deal found 1/18

$429

Wed 3/47:10 pm

BOS

FAO

1 stop32h 15m

KLM

Wed 3/1110:20 am

FAO

BOS

1 stop13h 35m

KLM

Deal found 1/18

$457

Fri 3/69:25 pm

BOS

PXO

2 stops29h 30m

Azores Airlines

Fri 3/138:30 am

PXO

BOS

2 stops16h 30m

Azores Airlines

Deal found 1/20

$914

Sun 2/229:45 am

BOS

OPO

2 stops18h 45m

United Airlines

Wed 3/1112:35 pm

OPO

BOS

2 stops26h 14m

United Airlines

Deal found 1/17

$380

Wed 3/48:00 am

BOS

OPO

2 stops21h 30m

Delta

Wed 5/135:00 am

OPO

BOS

1 stop16h 33m

Delta

Deal found 1/17

$424

Tue 3/39:20 pm

BOS

SJZ

2 stops32h 20m

Multiple Airlines

Tue 3/1010:30 am

SJZ

BOS

1 stop13h 25m

Multiple Airlines

Deal found 1/18

$462

Mon 2/238:50 pm

BOS

FAO

1 stop31h 40m

KLM

Tue 3/107:45 pm

FAO

BOS

2 stops25h 30m

KLM

Deal found 1/19

$462

Sun 3/228:15 am

BOS

OPO

2 stops21h 15m

United Airlines

Tue 3/3112:00 pm

OPO

BOS

2 stops28h 01m

United Airlines

Deal found 1/18

$397

Sun 2/110:45 pm

BOS

FNC

2 stops17h 00m

TAP AIR PORTUGAL

Mon 2/94:10 am

FNC

BOS

1 stop15h 35m

TAP AIR PORTUGAL

Deal found 1/18

$531

Mon 1/269:20 pm

BOS

PIX

1 stop11h 05m

Multiple Airlines

Mon 3/25:55 pm

PIX

BOS

1 stop30h 00m

Multiple Airlines

Deal found 1/19

$469

Sun 2/2210:45 pm

BOS

FNC

2 stops17h 00m

TAP AIR PORTUGAL

Tue 3/34:10 am

FNC

BOS

1 stop15h 25m

TAP AIR PORTUGAL

Deal found 1/18

$531

Wed 3/46:30 am

PWM

LIS

1 stop21h 10m

Delta

Wed 3/185:00 am

LIS

PWM

2 stops22h 22m

Delta

Deal found 1/19

$498

Thu 3/59:20 pm

BOS

SJZ

2 stops32h 45m

Multiple Airlines

Thu 3/124:25 pm

SJZ

BOS

2 stops31h 35m

Multiple Airlines

Deal found 1/19

$477

Mon 4/2710:30 pm

BOS

FNC

1 stop18h 20m

TAP AIR PORTUGAL

Wed 5/63:05 pm

FNC

BOS

1 stop10h 40m

TAP AIR PORTUGAL

Deal found 1/18

$533

Mon 2/238:50 pm

BOS

FNC

1 stop31h 45m

KLM

Wed 3/410:25 am

FNC

BOS

2 stops17h 26m

KLM

Deal found 1/19

$547

Mon 3/92:30 pm

PWM

LIS

2 stops20h 40m

Delta

Wed 3/1811:25 am

LIS

PWM

2 stops40h 34m

Delta

Deal found 1/19

$501

Thu 3/59:20 pm

BOS

PIX

1 stop14h 45m

Multiple Airlines

Thu 3/129:45 am

PIX

BOS

1 stop14h 10m

Multiple Airlines

Deal found 1/19

$484

Fri 5/810:45 pm

BOS

FNC

1 stop20h 25m

TAP AIR PORTUGAL

Sun 5/173:05 pm

FNC

BOS

1 stop10h 35m

TAP AIR PORTUGAL

Deal found 1/19

$543

Tue 3/37:10 pm

BOS

FNC

1 stop33h 20m

KLM

Thu 3/1210:20 am

FNC

BOS

2 stops24h 55m

KLM

Deal found 1/19

$547

Wed 3/43:05 pm

PWM

LIS

2 stops14h 10m

United Airlines

Wed 3/185:00 am

LIS

PWM

2 stops17h 25m

United Airlines

Deal found 1/19

$499

Mon 3/92:30 pm

PWM

LIS

2 stops20h 40m

Delta

Thu 3/195:00 am

LIS

PWM

2 stops22h 59m

Delta

Deal found 1/19

$501

Last-minute flights from Maine to Portugal
Discover last-minute flight deals from Maine to Portugal. Data last updated January 20, 2026 and is based on user searches.

Thu 1/226:05 pm

BOS

OPO

1 stop11h 55m

TAP AIR PORTUGAL

Mon 2/95:55 pm

OPO

BOS

1 stop25h 50m

TAP AIR PORTUGAL

Deal found 1/18

$351

Wed 1/289:50 pm

BOS

OPO

1 stop32h 20m

SWISS

Wed 3/47:20 pm

OPO

BOS

1 stop30h 00m

SWISS

Deal found 1/17

$341

Wed 1/288:40 pm

BOS

OPO

1 stop11h 35m

Multiple Airlines

Mon 3/27:20 pm

OPO

BOS

1 stop30h 00m

Multiple Airlines

Deal found 1/17

$360

Sun 2/18:40 pm

BOS

OPO

1 stop11h 10m

Lufthansa

Mon 2/91:45 pm

OPO

BOS

1 stop33h 50m

Lufthansa

Deal found 1/19

$364

Sun 2/810:10 pm

BOS

OPO

1 stop32h 05m

SWISS

Wed 2/257:20 pm

OPO

BOS

1 stop29h 40m

SWISS

Deal found 1/19

$361

Mon 2/167:10 pm

BOS

FAO

1 stop33h 20m

KLM

Mon 2/2310:05 am

FAO

BOS

1 stop32h 20m

KLM

Deal found 1/18

$457

Tue 2/179:50 pm

BOS

OPO

1 stop32h 25m

SWISS

Tue 2/247:25 pm

OPO

BOS

1 stop29h 55m

SWISS

Deal found 1/18

$366

Fri 2/205:35 pm

BOS

FNC

1 stop16h 45m

Scandinavian Airlines

Sat 3/74:10 pm

FNC

BOS

1 stop28h 40m

Scandinavian Airlines

Deal found 1/19

$458

Sun 2/2210:10 pm

BOS

OPO

1 stop32h 05m

SWISS

Mon 3/27:20 pm

OPO

BOS

1 stop30h 00m

SWISS

Deal found 1/18

$347

Sun 2/226:15 am

BOS

OPO

2 stops31h 15m

Multiple Airlines

Mon 3/27:20 pm

OPO

BOS

1 stop30h 00m

Multiple Airlines

Deal found 1/18

$368

Mon 2/238:40 pm

BOS

OPO

1 stop11h 10m

Multiple Airlines

Wed 3/412:10 pm

OPO

BOS

1 stop13h 10m

Multiple Airlines

Deal found 1/19

$359

Mon 2/2310:10 pm

BOS

FAO

1 stop15h 00m

SWISS

Tue 3/107:00 pm

FAO

BOS

1 stop30h 20m

SWISS

Deal found 1/19

$386

One-way flights from Maine to Portugal
Search for one-way flight options from Maine to Portugal. Find affordable one-way fares based on user searches. Data last updated January 20, 2026.

Tue 4/148:05 pm

BOS

OPO

1 stop22h 20m

Lufthansa

Deal found 1/17

$214

Mon 5/116:05 pm

BOS

PDL

1 stop11h 40m

TAP AIR PORTUGAL

Deal found 1/18

$218

Wed 1/286:05 pm

BOS

PDL

1 stop20h 30m

TAP AIR PORTUGAL

Deal found 1/19

$231

Tue 3/315:10 pm

BOS

OPO

1 stop35h 10m

Austrian Airlines

Deal found 1/19

$231

Thu 1/2910:45 pm

BOS

PDL

1 stop15h 45m

TAP AIR PORTUGAL

Deal found 1/19

$234

Sat 4/410:45 pm

BOS

PDL

1 stop21h 00m

TAP AIR PORTUGAL

Deal found 1/17

$238

Tue 4/146:00 am

BOS

OPO

3 stops34h 20m

Multiple Airlines

Deal found 1/18

$242

Fri 1/239:25 pm

BOS

OPO

2 stops44h 45m

Multiple Airlines

Deal found 1/18

$243

Tue 4/2810:45 pm

BOS

PDL

1 stop21h 00m

TAP AIR PORTUGAL

Deal found 1/18

$253

Wed 5/136:05 pm

BOS

PDL

1 stop11h 40m

TAP AIR PORTUGAL

Deal found 1/18

$254

Sat 4/1110:50 pm

BOS

OPO

1 stop28h 10m

Multiple Airlines

Deal found 1/18

$254

Wed 1/286:05 pm

BOS

TER

1 stop12h 55m

TAP AIR PORTUGAL

Deal found 1/20

$254

Find flight deals from Maine to Portugal

Most accurate provider	FlightHub 3 stars
Most trusted provider	AranGrant 3 stars
Round-trip from	$341 (Kiwi.com)
One-way from	$214 (FlightHub)
Popular in	December
Cheapest in	February
Average price	$622

Provider with most accurate pricing for Portland-Lisbon Humberto Delgado flight deals.

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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. 39% potential increase in price ($770 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 45% potential price decrease ($375 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in January 2026

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Mon 2/23

6:27 pm-9:30 am

1 stop10h 03m

Porto

Wed 3/4

12:35 pm-8:11 pm

1 stop12h 36m

$376

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 2/22

9:45 am-9:30 am

2 stops18h 45m

Porto

Tue 3/10

12:35 pm-8:15 pm

1 stop11h 40m

$380

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Mon 2/23

5:35 am-9:30 am

2 stops22h 55m

Porto

Tue 3/10

12:35 pm-8:15 pm

1 stop11h 40m

$380

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 2/22

9:45 am-9:30 am

2 stops18h 45m

Porto

Wed 3/11

12:35 pm-10:49 am

2 stops26h 14m

$380

BostonFaro

BOS - FAO

BOSFAO

Boston Logan Intl

Mon 2/23

10:10 pm-6:10 pm

1 stop15h 00m

Faro

Tue 3/10

7:00 pm-9:20 pm

1 stop30h 20m

$386

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 3/22

8:15 am-9:30 am

2 stops21h 15m

Porto

Tue 3/31

12:00 pm-11:01 am

2 stops28h 01m

$397

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Tue 2/10

1:00 pm-10:30 am

2 stops16h 30m

Porto

Tue 2/24

5:00 am-1:25 pm

1 stop13h 25m

$413

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Tue 2/10

1:00 pm-10:30 am

2 stops16h 30m

Porto

Tue 2/17

5:00 am-1:25 pm

1 stop13h 25m

$413

BostonFaro

BOS - FAO

BOSFAO

Boston Logan Intl

Wed 3/4

4:25 pm-11:40 am

2 stops14h 15m

Faro

Wed 3/11

2:40 pm-9:20 pm

1 stop34h 40m

$422

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 3/4

8:00 am-10:30 am

2 stops21h 30m

Porto

Wed 5/13

5:00 am-4:33 pm

1 stop16h 33m

$424

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/17

Showing 1-10 of 60 results

...

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

How long is the flight from Maine to Portugal?
For as low as $376, United Airlines can have you in Portugal from Maine in 10h 03m. 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

Top airline flying from Maine to Portugal

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$578	Average$772	FlexibilityNo cancel fee	On-time69%

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$214+ 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 4/14. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheap flight deals from Maine to Portugal

Cheapest flights from Maine to PortugalExplore 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 January 20, 2026.

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 January 20, 2026.

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 January 20, 2026.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from Maine to Portugal that are best for you.

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.

Cheapflights Insights

Everything you need to know about your flight from Maine to Portugal

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?

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

How can I find direct flights from Maine to Portugal?

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

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Alternative routes for Maine to Portugal

See prices for flight routes from nearby airports that may be better suited for you.

Top airline flying from Maine to Portugal

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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 January 20, 2026.