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$375+ 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 5/10. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — LIS
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
1 adult, Economy
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Cheap flight deals from Portland to Portugal

Keep the following information in mind while searching for Portland to Portugal flight deals. Data was last updated April 17, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$832
(United Airlines)

One-way from

$375
(Kiwi.com)

Popular in

May

Cheapest in

February

Average price

$981
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.
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From Portland to Portugal
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One-way flight from Portland to Portugal
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Highest demand for flights based on searches. 28% potential increase in price ($339 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($59 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find 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 April 17, 2025.

This KLM deal was found by Cheapflights users on 4/17. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/110:00 amPWM - LIS
1 stop17h 00mKLM
Mon 12/83:25 pmLIS - PWM
2 stops37h 06mKLM
Deal found 4/17$629
This American Airlines deal was found by Cheapflights users on 4/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/14:18 pmPWM - LIS
2 stops17h 37mAmerican Airlines
Mon 12/811:05 amLIS - PWM
2 stops17h 35mAmerican Airlines
Deal found 4/17$701
This United Airlines deal was found by Cheapflights users on 4/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/193:15 pmPWM - OPO
1 stop10h 35mUnited Airlines
Sun 10/56:00 amOPO - PWM
2 stops22h 54mUnited Airlines
Deal found 4/15$832
This Air Canada deal was found by Cheapflights users on 4/17. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/111:17 amPWM - LIS
3 stops17h 03mMultiple Airlines
Mon 12/811:00 amLIS - PWM
2 stops28h 44mMultiple Airlines
Deal found 4/17$1,191
This Air Canada deal was found by Cheapflights users on 4/17. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/111:17 amPWM - LIS
3 stops17h 03mAir Canada
Mon 12/87:10 amLIS - PWM
3 stops21h 07mAir Canada
Deal found 4/17$1,205
This Ovago deal was found by Cheapflights users on 4/17. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/176:35 amPWM - LIS
2 stops34h 30mScandinavian Airlines
Wed 5/217:15 amLIS - PWM
2 stops21h 59mScandinavian Airlines
Deal found 4/17$1,379
This TAP AIR PORTUGAL deal was found by Cheapflights users on 4/17. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/102:15 pmPWM - PDL
2 stops20h 30mMultiple Airlines
Fri 5/169:50 amPDL - PWM
2 stops31h 30mMultiple Airlines
Deal found 4/17$1,428
This Air Canada deal was found by Cheapflights users on 4/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/197:26 pmPWM - OPO
2 stops33h 09mMultiple Airlines
Sun 10/510:00 amOPO - PWM
3 stops18h 01mMultiple Airlines
Deal found 4/15$1,973
This Air Canada deal was found by Cheapflights users on 4/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/193:15 pmPWM - OPO
3 stops18h 40mAir Canada
Sun 10/510:00 amOPO - PWM
3 stops18h 01mAir Canada
Deal found 4/15$2,189

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 April 17, 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

PortlandPorto

PWM - OPO

PWMOPO

Portland

Fri 9/19

3:15 pm-6:50 am

1 stop10h 35m

Porto

Sun 10/5

6:00 am-11:54 pm

2 stops22h 54m

$832

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Sat 5/17

6:35 am-10:05 pm

2 stops34h 30m

Lisbon Humberto Delgado

Wed 5/21

7:15 am-12:14 am

2 stops21h 59m

$1,379

PortlandPonta Delgada

PWM - PDL

PWMPDL

Portland

Sat 5/10

2:15 pm-2:45 pm

2 stops20h 30m

Ponta Delgada Nordela

Fri 5/16

9:50 am-1:20 pm

2 stops31h 30m

$1,428

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Sat 5/17

1:07 pm-9:05 am

1 stop14h 58m

Lisbon Humberto Delgado

Wed 5/21

6:35 am-10:45 pm

2 stops21h 10m

$1,622

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Sat 5/17

6:00 am-9:15 am

3 stops22h 15m

Lisbon Humberto Delgado

Wed 5/21

11:25 am-11:27 pm

2 stops17h 02m

$1,678

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Sat 5/17

3:43 pm-4:30 pm

3 stops19h 47m

Lisbon Humberto Delgado

Wed 5/21

8:35 am-11:27 pm

3 stops19h 52m

$1,733

PortlandPorto

PWM - OPO

PWMOPO

Portland

Fri 9/19

7:26 pm-9:35 am

2 stops33h 09m

Porto

Sun 10/5

10:00 am-11:01 pm

3 stops18h 01m

$1,973

PortlandPorto

PWM - OPO

PWMOPO

Portland

Fri 9/19

3:15 pm-2:55 pm

3 stops18h 40m

Porto

Sun 10/5

10:00 am-11:01 pm

3 stops18h 01m

$2,189

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Sat 5/10

7:30 pm-9:10 am

2 stops56h 40m

$375

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Sun 5/11

3:35 pm-10:05 am

1 stop13h 30m

$647

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

Showing 1-10 of 12 results
1
2

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, January is the cheapest month in which you can book a flight from Portland, Maine to Portugal (average of $612). Flying from Portland, Maine to Portugal in June is currently the most expensive (average of $1,203). 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 April 17, 2025.

When flying from Portland, Maine to Portugal, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Portugal by month

Plan your trip to Portugal by taking into account the average rainfall totals by month.

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.

Temperature in Portugal by month

Plan your trip to Portugal by taking into account the average temperature totals by month.

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).

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 April 17, 2025.
Peruse reviews from past customers who have flown with United Airlines, Scandinavian Airlines and American Airlines from Portland to Portugal to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,667 reviews

Boarding

7.7

Comfort

7.3

Overall

7.4

Food

6.6

Crew

8.1

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,667 reviews
United Airlines
7.4
Good
8,667 reviews

Boarding

7.7

Comfort

7.3

Overall

7.4

Food

6.6

Crew

8.1

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Scandinavian Airlines
7.3
Good
1,335 reviews
United Airlines
7.4
Good
8,667 reviews

Boarding

7.7

Comfort

7.3

Overall

7.4

Food

6.6

Crew

8.1

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,667 reviews

Boarding

7.7

Comfort

7.3

Overall

7.4

Food

6.6

Crew

8.1

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
TAP AIR PORTUGAL
7.1
Good
1,839 reviews
United Airlines
7.4
Good
8,667 reviews

Boarding

7.7

Comfort

7.3

Overall

7.4

Food

6.6

Crew

8.1

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Air Canada
7.0
Good
9,143 reviews
United Airlines
7.4
Good
8,667 reviews

Boarding

7.7

Comfort

7.3

Overall

7.4

Food

6.6

Crew

8.1

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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.

  • 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, January is the cheapest month in which you can book a flight from Portland, Maine to Portugal (average of $612). Flying from Portland, Maine to Portugal in June is currently the most expensive (average of $1,203). 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 April 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$550Average$981FlexibilityNo cancel feeOn-time69%

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