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Portugal

$572+ Cheap flights from Portland, ME (PWM) to Portugal

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/27. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — LIS
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
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 August 14, 2025.

Round-trip from

$572
(United Airlines)

Popular in

May

Cheapest in

February

Average price

$931
From Portland to Portugal
Search Deals
Highest demand for flights based on searches. 31% potential increase in price ($390 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 9% potential price decrease ($73 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2025
Search Deals

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 August 14, 2025.

This United Airlines deal was found by Cheapflights users on 8/12. 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 10/277:22 pmPWM - LIS
1 stop10h 53mUnited Airlines
Tue 11/115:00 amLIS - PWM
2 stops17h 48mUnited Airlines
Deal found 8/12$572
This United Airlines deal was found by Cheapflights users on 8/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/13:00 pmPWM - LIS
1 stop12h 10mUnited Airlines
Mon 12/811:20 amLIS - PWM
2 stops36h 34mUnited Airlines
Deal found 8/14$612
This American Airlines deal was found by Cheapflights users on 8/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/16:39 pmPWM - LIS
1 stop9h 26mAmerican Airlines
Mon 12/811:05 amLIS - PWM
1 stop16h 24mAmerican Airlines
Deal found 8/14$629
This United Airlines deal was found by Cheapflights users on 8/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/79:54 amPWM - OPO
2 stops20h 46mUnited Airlines
Tue 11/1112:35 pmOPO - PWM
2 stops26h 29mUnited Airlines
Deal found 8/14$674
This American Airlines deal was found by Cheapflights users on 8/12. 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 10/274:15 pmPWM - LIS
1 stop12h 50mAmerican Airlines
Tue 11/1111:10 amLIS - PWM
1 stop12h 03mAmerican Airlines
Deal found 8/12$680
This KLM deal was found by Cheapflights users on 8/13. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/12:35 pmPWM - LIS
2 stops15h 00mMultiple Airlines
Mon 12/86:30 pmLIS - PWM
2 stops24h 22mMultiple Airlines
Deal found 8/13$695
This Air Canada deal was found by Cheapflights users on 8/12. 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.
Tue 11/256:00 amPWM - LIS
2 stops22h 20mAir Canada
Mon 12/111:20 amLIS - PWM
2 stops36h 22mAir Canada
Deal found 8/12$715
This Air Canada deal was found by Cheapflights users on 8/12. 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.
Wed 11/266:00 amPWM - LIS
2 stops21h 55mAir Canada
Mon 12/111:20 amLIS - PWM
2 stops36h 22mAir Canada
Deal found 8/12$722
This United Airlines deal was found by Cheapflights users on 8/12. 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.
Thu 11/272:20 pmPWM - LIS
1 stop14h 55mUnited Airlines
Mon 12/111:20 amLIS - PWM
2 stops16h 57mUnited Airlines
Deal found 8/12$788
This oojo deal was found by Cheapflights users on 8/13. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/47:09 amPWM - LIS
2 stops35h 26mTurkish Airlines
Wed 10/225:55 amLIS - PWM
2 stops45h 07mTurkish Airlines
Deal found 8/13$834
This United Airlines deal was found by Cheapflights users on 8/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/44:57 pmPWM - LIS
2 stops35h 23mUnited Airlines
Wed 10/225:05 amLIS - PWM
2 stops16h 39mUnited Airlines
Deal found 8/14$858
This United Airlines deal was found by Cheapflights users on 8/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/66:14 amPWM - PDL
2 stops22h 26mUnited Airlines
Sat 9/1311:00 amPDL - PWM
1 stop11h 26mUnited Airlines
Deal found 8/13$1,305

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 August 14, 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

Mon 10/27

7:22 pm-10:15 am

1 stop10h 53m

Lisbon Humberto Delgado

Tue 11/11

5:00 am-5:48 pm

2 stops17h 48m

$572

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Mon 12/1

7:22 pm-10:15 am

1 stop9h 53m

Lisbon Humberto Delgado

Mon 12/8

11:20 am-10:00 pm

2 stops39h 40m

$612

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Mon 12/1

6:39 pm-9:05 am

1 stop9h 26m

Lisbon Humberto Delgado

Mon 12/8

11:05 am-10:29 pm

1 stop16h 24m

$629

PortlandPorto

PWM - OPO

PWMOPO

Portland

Fri 11/7

9:54 am-11:40 am

2 stops20h 46m

Porto

Tue 11/11

12:35 pm-10:04 am

2 stops26h 29m

$674

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Mon 10/27

4:15 pm-9:05 am

1 stop12h 50m

Lisbon Humberto Delgado

Tue 11/11

11:10 am-6:13 pm

1 stop12h 03m

$680

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Mon 12/1

2:35 pm-10:35 am

2 stops15h 00m

Lisbon Humberto Delgado

Mon 12/8

6:30 pm-1:52 pm

2 stops24h 22m

$695

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Tue 11/25

6:00 am-9:20 am

2 stops22h 20m

Lisbon Humberto Delgado

Mon 12/1

11:20 am-6:42 pm

2 stops36h 22m

$715

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Wed 11/26

6:00 am-8:55 am

2 stops21h 55m

Lisbon Humberto Delgado

Mon 12/1

11:20 am-6:42 pm

2 stops36h 22m

$722

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Thu 11/27

2:20 pm-10:15 am

1 stop14h 55m

Lisbon Humberto Delgado

Mon 12/1

11:20 am-11:17 pm

2 stops16h 57m

$788

PortlandPonta Delgada

PWM - PDL

PWMPDL

Portland

Sat 9/6

6:14 am-8:40 am

2 stops22h 26m

Ponta Delgada Nordela

Sat 9/13

11:00 am-9:59 pm

2 stops14h 59m

$1,305

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/12

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 $1,128). 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 August 14, 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.

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 August 14, 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
8,916 reviews

Boarding

7.7

Overall

7.4

Crew

8.1

Food

6.6

Comfort

7.3

Entertainment

7.1

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
8,916 reviews
United Airlines
7.4
Good
8,916 reviews

Boarding

7.7

Overall

7.4

Crew

8.1

Food

6.6

Comfort

7.3

Entertainment

7.1

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 $1,128). 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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$578Average$772FlexibilityNo cancel feeOn-time69%

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