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Portugal

$615+ 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 4/26. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — LIS
Apr 15 — Apr 221
Wed 4/15
Wed 4/22
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 March 16, 2026.

This United Airlines deal was found by Cheapflights users on 3/11. 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.
Sun 4/267:33 pm
PWM
-
LIS
1 stop9h 57m
United Airlines
Sun 5/37:25 am
LIS
-
PWM
2 stops18h 54m
United Airlines
Deal found 3/11$615
This United Airlines deal was found by Cheapflights users on 3/15. 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 11/135:30 am
PWM
-
OPO
2 stops28h 45m
United Airlines
Tue 11/176:00 am
OPO
-
PWM
2 stops20h 27m
United Airlines
Deal found 3/15$687
This United Airlines deal was found by Cheapflights users on 3/15. 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 11/135:30 am
PWM
-
LIS
1 stop23h 45m
United Airlines
Tue 11/1711:20 am
LIS
-
PWM
2 stops41h 39m
United Airlines
Deal found 3/15$700
This United Airlines deal was found by Cheapflights users on 3/15. 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.
Sun 4/127:36 pm
PWM
-
LIS
2 stops32h 44m
United Airlines
Sun 4/196:45 am
LIS
-
PWM
2 stops43h 55m
United Airlines
Deal found 3/15$705
This United Airlines deal was found by Cheapflights users on 3/15. 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.
Wed 4/297:33 pm
PWM
-
LIS
2 stops37h 07m
United Airlines
Mon 5/45:05 am
LIS
-
PWM
2 stops34h 13m
United Airlines
Deal found 3/15$715
This United Airlines deal was found by Cheapflights users on 3/15. 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 4/243:22 pm
PWM
-
LIS
2 stops19h 08m
United Airlines
Sat 5/25:05 am
LIS
-
PWM
2 stops23h 54m
United Airlines
Deal found 3/15$721
This Delta deal was found by Cheapflights users on 3/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/114:48 pm
PWM
-
LIS
2 stops20h 02m
Delta
Sat 4/1810:00 am
LIS
-
PWM
1 stop19h 46m
Delta
Deal found 3/12$731
This United Airlines deal was found by Cheapflights users on 3/14. 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.
Wed 4/292:12 pm
PWM
-
LIS
2 stops20h 23m
United Airlines
Wed 5/612:20 pm
LIS
-
PWM
1 stop16h 39m
United Airlines
Deal found 3/14$733
This KLM deal was found by Cheapflights users on 3/13. 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 4/272:51 pm
PWM
-
LIS
1 stop12h 09m
Multiple Airlines
Mon 5/46:50 pm
LIS
-
PWM
2 stops24h 21m
Multiple Airlines
Deal found 3/13$734
This oojo deal was found by Cheapflights users on 3/12. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/156:00 am
PWM
-
OPO
2 stops28h 40m
Turkish Airlines
Sun 6/1410:45 am
OPO
-
PWM
2 stops42h 12m
Turkish Airlines
Deal found 3/12$748
This KAYAK deal was found by Cheapflights users on 3/12. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/126:00 am
PWM
-
OPO
2 stops22h 45m
Turkish Airlines
Tue 6/1610:40 am
OPO
-
PWM
2 stops31h 49m
Turkish Airlines
Deal found 3/12$809
This KAYAK deal was found by Cheapflights users on 3/12. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/126:00 am
PWM
-
OPO
2 stops28h 40m
Turkish Airlines
Mon 6/1510:40 am
OPO
-
PWM
2 stops55h 49m
Turkish Airlines
Deal found 3/12$814

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 March 16, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$615
(United Airlines)

Popular in

December

Cheapest in

February

Average price

$678
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 Portland to Portugal
Search Deals
Highest demand for flights based on searches. 34% potential increase in price ($677 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 39% potential price decrease ($366 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
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 March 16, 2026.
Use the filters below to find and compare flights from Portland to Portugal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Sun 4/26

7:33 pm-10:30 am

1 stop9h 57m

Lisbon Humberto Delgado

Sun 5/3

7:25 am-9:19 pm

2 stops18h 54m

$615

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Sun 4/12

7:36 pm-9:20 am

2 stops32h 44m

Lisbon Humberto Delgado

Sun 4/19

6:45 am-9:40 pm

2 stops43h 55m

$705

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Fri 4/24

3:22 pm-3:30 pm

2 stops19h 08m

Lisbon Humberto Delgado

Sat 5/2

5:05 am-11:59 pm

2 stops23h 54m

$721

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Sat 4/11

4:48 pm-5:50 pm

2 stops20h 02m

Lisbon Humberto Delgado

Sat 4/18

10:00 am-12:46 am

1 stop19h 46m

$731

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Wed 4/29

2:12 pm-3:35 pm

2 stops20h 23m

Lisbon Humberto Delgado

Wed 5/6

10:25 am-7:04 pm

2 stops13h 39m

$738

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Wed 4/29

3:02 pm-3:40 pm

2 stops19h 38m

Lisbon Humberto Delgado

Mon 5/4

7:10 am-11:27 pm

2 stops21h 17m

$765

PortlandPorto

PWM - OPO

PWMOPO

Portland

Thu 4/30

3:39 pm-3:45 pm

2 stops19h 06m

Porto

Thu 5/7

6:00 am-9:19 pm

2 stops20h 19m

$842

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Wed 4/29

2:51 pm-8:00 am

1 stop12h 09m

Lisbon Humberto Delgado

Mon 5/4

10:00 am-12:46 am

1 stop19h 46m

$851

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Sat 5/9

2:38 pm-8:00 am

1 stop12h 22m

Lisbon Humberto Delgado

Sat 5/16

10:00 am-12:43 am

1 stop19h 43m

$921

PortlandPonta Delgada

PWM - PDL

PWMPDL

Portland

Sun 4/26

7:30 am-6:45 am

1 stop19h 15m

Ponta Delgada Nordela

Sun 5/3

6:05 pm-11:36 pm

2 stops33h 31m

$942

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/11

Showing 1-10 of 24 resultsSorted by cheapest first
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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, October is the cheapest month in which you can book a flight from Portland, Maine to Portugal (average of $202). Flying from Portland, Maine to Portugal in June is currently the most expensive (average of $554). 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.

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 March 16, 2026.
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
9,428 reviews

Crew

8.1

Comfort

7.3

Boarding

7.7

Food

6.6

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,428 reviews
United Airlines
7.4
Good
9,428 reviews

Crew

8.1

Comfort

7.3

Boarding

7.7

Food

6.6

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

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 $615, United Airlines can have you in Portugal from Portland, Maine in 9h 57m. 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 - Ponta Delgada Nordela and Portland - Porto.

  • 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, October is the cheapest month in which you can book a flight from Portland, Maine to Portugal (average of $202). Flying from Portland, Maine to Portugal in June is currently the most expensive (average of $554). 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

Browse thousands of different options on Cheapflights for your next trip

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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 March 16, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$550Average$721FlexibilityNo cancel feeOn-time69%

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