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$423+ Cheap flights from Portland, ME (PWM) 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 3/1. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — LIS
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheap flight deals from Portland to Portugal

Cheapest flights from Portland to Portugal
Explore the most affordable flight options available from Portland to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.

This United Airlines deal was found by Cheapflights users on 12/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/237:30 pmPWM - LIS
1 stop9h 45mUnited Airlines
Thu 1/110:15 amLIS - PWM
1 stop12h 56mUnited Airlines
Deal found 12/11$2,080
This Delta deal was found by Cheapflights users on 12/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/231:03 pmPWM - LIS
2 stops16h 32mDelta
Thu 1/15:00 amLIS - PWM
2 stops22h 43mDelta
Deal found 12/11$2,253
This United Airlines deal was found by Cheapflights users on 12/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/227:30 pmPWM - LIS
1 stop9h 45mUnited Airlines
Sat 1/311:55 amLIS - PWM
1 stop31h 45mUnited Airlines
Deal found 12/11$2,801
This Delta deal was found by Cheapflights users on 12/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/221:03 pmPWM - LIS
1 stop14h 57mDelta
Sat 1/35:00 amLIS - PWM
2 stops22h 43mDelta
Deal found 12/10$2,830

Find flight deals from Portland to Portugal

Keep the following information in mind while searching for Portland to Portugal flight deals. Data was last updated December 12, 2025.

Most accurate provider

Gotogate
3 stars

Most trusted provider

Gotogate
3 stars

Round-trip from

$558
(KLM)

One-way from

$423
(KLM)

Popular in

June

Cheapest in

November

Average price

$869
Provider with most accurate pricing for Boston Logan Intl-Lisbon Humberto Delgado flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boston Logan Intl-Lisbon Humberto Delgado flights.
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From Portland to Portugal
Search Deals
One-way flight from Portland to Portugal
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($119 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland 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 December 12, 2025.
Use the filters below to find and compare flights from Portland to Portugal that are best for you.

Fly from

Portland

Fly to

Portugal

Route

Depart

Return

Price

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Sun 1/11

2:35 pm-11:20 am

2 stops15h 45m

Lisbon Humberto Delgado

Sun 1/18

5:00 am-12:20 am

2 stops24h 20m

$562

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Wed 1/21

6:00 am-9:20 am

2 stops22h 20m

Lisbon Humberto Delgado

Sun 1/25

10:50 am-11:30 pm

2 stops41h 40m

$589

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Thu 1/8

3:12 pm-8:10 am

1 stop11h 58m

Lisbon Humberto Delgado

Thu 1/15

10:15 am-6:50 pm

1 stop13h 35m

$590

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Wed 1/21

2:31 pm-8:10 am

2 stops12h 39m

Lisbon Humberto Delgado

Sun 1/25

5:00 am-6:50 pm

2 stops18h 50m

$591

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Thu 1/8

3:12 pm-9:20 am

2 stops37h 08m

Lisbon Humberto Delgado

Thu 1/15

11:20 am-9:01 am

2 stops50h 41m

$600

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Fri 1/30

3:12 pm-8:10 am

1 stop11h 58m

Lisbon Humberto Delgado

Sun 2/8

10:15 am-6:50 pm

1 stop13h 35m

$649

PortlandPorto

PWM - OPO

PWMOPO

Portland

Fri 1/23

2:31 pm-11:40 am

2 stops16h 09m

Porto

Tue 1/27

6:00 am-6:52 pm

2 stops17h 52m

$704

PortlandPonta Delgada

PWM - PDL

PWMPDL

Portland

Sat 5/2

6:00 am-6:20 am

2 stops20h 20m

Ponta Delgada Nordela

Sun 5/10

5:30 pm-1:23 pm

1 stop23h 53m

$1,028

PortlandPonta Delgada

PWM - PDL

PWMPDL

Portland

Wed 2/4

7:27 pm-6:35 pm

2 stops19h 08m

Ponta Delgada Nordela

Wed 2/18

6:35 am-11:20 pm

2 stops20h 45m

$1,160

PortlandPorto

PWM - OPO

PWMOPO

Portland

Sun 3/1

12:15 pm-10:30 am

2 stops17h 15m

$423

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Showing 1-10 of 14 results
1
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Best time to book a flight from Portland to Portugal

Have a flexible travel schedule? Discover the best time to fly to Portugal from Portland 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 Portland to Portugal

What is the cheapest month to book a flight from Portland, Maine to Portugal?

Currently, February is the cheapest month in which you can book a flight from Portland, Maine to Portugal (average of $346). Flying from Portland, Maine to Portugal in May is currently the most expensive (average of $479). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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

Find hourly flight availability from Portland to Portugal. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 12, 2025.

One of the essential ways to save on airfare from Portland, Maine to Portugal is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 28% on airfare.

Reviews of airlines servicing Portugal

Get insights into the airlines that provide service to Portugal. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Portugal. Reviews last updated December 12, 2025.
See what other customers who have flown with United Airlines from Portland to Portugal have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,095 reviews

Food

6.6

Comfort

7.3

Crew

8.1

Entertainment

7.1

Overall

7.4

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
United Airlines
7.4
Good
9,095 reviews
United Airlines
7.4
Good
9,095 reviews

Food

6.6

Comfort

7.3

Crew

8.1

Entertainment

7.1

Overall

7.4

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.

Related info for your journey

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

  • What airport do you fly from for flights from Portland to Portugal?

    For a flight from Portland to Portugal, you will be flying from Portland. Portland (PWM) is just 2.9 mi from the center of the city.

  • How long is the flight from Portland, Maine to Portugal?

    For as low as $590, Air Canada can have you in Portugal from Portland, Maine in 11h 58m. The distance between Portland, Maine and Portugal is about 3123 mi. This flight may include one or multiple stops.

  • What are the most popular routes from Portland, Maine to Portugal?

    The most popular flight routes from Portland, Maine to Portugal are Portland - Lisbon Humberto Delgado, Portland - Porto and Portland - Ponta Delgada Nordela.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Portland 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.

  • What is the cheapest month to book a flight from Portland, Maine to Portugal?

    Currently, February is the cheapest month in which you can book a flight from Portland, Maine to Portugal (average of $346). Flying from Portland, Maine to Portugal in May is currently the most expensive (average of $479). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top airline flying from Portland to Portugal

Discover the top airline that operate flights from Portland 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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$578Average$778FlexibilityNo cancel feeOn-time69%

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