HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Portugal

$399+ 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 2/24. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — LIS
Feb 26 — Mar 51
Thu 2/26
Thu 3/5
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Portland to Portugal with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 January 27, 2026.

This United Airlines deal was found by Cheapflights users on 1/26. 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 2/252:10 pm
PWM
-
LIS
1 stop15h 05m
United Airlines
Wed 3/115:00 am
LIS
-
PWM
2 stops38h 14m
United Airlines
Deal found 1/26$495
This United Airlines deal was found by Cheapflights users on 1/26. 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 2/233:10 pm
PWM
-
LIS
1 stop12h 00m
United Airlines
Mon 3/26:10 am
LIS
-
PWM
2 stops22h 10m
United Airlines
Deal found 1/26$497
This KLM deal was found by Cheapflights users on 1/26. 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.
Sat 4/182:51 pm
PWM
-
LIS
1 stop12h 09m
Multiple Airlines
Tue 4/286:50 pm
LIS
-
PWM
2 stops24h 21m
Multiple Airlines
Deal found 1/26$554
This KLM deal was found by Cheapflights users on 1/26. 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.
Tue 3/242:30 pm
PWM
-
LIS
2 stops16h 05m
Multiple Airlines
Wed 4/85:35 am
LIS
-
PWM
2 stops22h 47m
Multiple Airlines
Deal found 1/26$576
This Delta deal was found by Cheapflights users on 1/26. 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.
Sun 3/16:00 am
PWM
-
LIS
2 stops21h 00m
Delta
Tue 3/2411:25 am
LIS
-
PWM
2 stops30h 25m
Delta
Deal found 1/26$578
This KLM deal was found by Cheapflights users on 1/26. 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.
Tue 3/242:30 pm
PWM
-
LIS
2 stops16h 05m
KLM
Wed 4/810:00 am
LIS
-
PWM
1 stop18h 59m
KLM
Deal found 1/26$579
This United Airlines deal was found by Cheapflights users on 1/26. 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 2/283:05 pm
PWM
-
LIS
1 stop12h 05m
United Airlines
Tue 3/246:10 am
LIS
-
PWM
2 stops20h 54m
United Airlines
Deal found 1/26$584
This United Airlines deal was found by Cheapflights users on 1/26. 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 2/275:45 am
PWM
-
LIS
2 stops21h 25m
United Airlines
Tue 3/246:10 am
LIS
-
PWM
2 stops20h 54m
United Airlines
Deal found 1/26$589
This United Airlines deal was found by Cheapflights users on 1/25. 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 1/302:31 pm
PWM
-
OPO
2 stops16h 09m
United Airlines
Tue 2/36:00 am
OPO
-
PWM
2 stops37h 31m
United Airlines
Deal found 1/25$779
This oojo deal was found by Cheapflights users on 1/25. 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 5/12:18 pm
PWM
-
PDL
1 stop12h 27m
Multiple Airlines
Sun 5/35:30 pm
PDL
-
PWM
1 stop23h 53m
Multiple Airlines
Deal found 1/25$817
This Travelocity deal was found by Cheapflights users on 1/25. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/82:18 pm
PWM
-
PDL
2 stops29h 27m
Multiple Airlines
Wed 5/136:30 am
PDL
-
PWM
2 stops34h 53m
Multiple Airlines
Deal found 1/25$853
This oojo deal was found by Cheapflights users on 1/25. 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 5/82:18 pm
PWM
-
PDL
2 stops20h 42m
TAP AIR PORTUGAL
Wed 5/136:30 am
PDL
-
PWM
2 stops34h 53m
TAP AIR PORTUGAL
Deal found 1/25$948

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 January 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$495
(United Airlines)

One-way from

$399
(United Airlines)

Popular in

December

Cheapest in

February

Average price

$622
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
One-way flight from Portland 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

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 January 27, 2026.
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

Wed 2/25

2:10 pm-10:15 am

1 stop15h 05m

Lisbon Humberto Delgado

Wed 3/11

5:00 am-3:14 pm

2 stops38h 14m

$495

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Mon 2/23

3:10 pm-8:10 am

1 stop12h 00m

Lisbon Humberto Delgado

Mon 3/2

6:10 am-11:20 pm

2 stops22h 10m

$497

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Tue 3/3

2:35 pm-5:30 pm

2 stops21h 55m

Lisbon Humberto Delgado

Tue 3/24

11:25 am-11:04 am

2 stops27h 39m

$502

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Sun 3/1

6:00 am-8:00 am

2 stops21h 00m

Lisbon Humberto Delgado

Tue 3/24

11:25 am-1:50 pm

2 stops30h 25m

$578

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Sun 3/1

9:40 am-10:15 am

1 stop19h 35m

Lisbon Humberto Delgado

Tue 3/24

6:10 am-11:04 pm

2 stops20h 54m

$584

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Mon 3/2

6:00 am-9:00 am

1 stop22h 00m

Lisbon Humberto Delgado

Wed 3/25

5:00 am-11:03 pm

2 stops22h 03m

$598

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Mon 3/2

3:10 pm-8:10 am

1 stop12h 00m

Lisbon Humberto Delgado

Wed 3/25

11:55 am-2:32 pm

1 stop30h 37m

$601

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Tue 3/3

3:05 pm-8:10 am

1 stop12h 05m

Lisbon Humberto Delgado

Wed 3/25

11:55 am-2:32 pm

1 stop30h 37m

$601

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Tue 3/3

2:35 pm-5:30 pm

2 stops21h 55m

Lisbon Humberto Delgado

Wed 3/25

5:00 am-11:03 pm

2 stops22h 03m

$602

PortlandPonta Delgada

PWM - PDL

PWMPDL

Portland

Fri 5/1

2:18 pm-6:45 am

1 stop12h 27m

Ponta Delgada Nordela

Sun 5/3

5:30 pm-1:23 pm

1 stop23h 53m

$817

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

Showing 1-10 of 19 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, July is the cheapest month in which you can book a flight from Portland, Maine to Portugal (average of $354). Flying from Portland, Maine to Portugal in May is currently the most expensive (average of $450). 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 January 27, 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
9,204 reviews

Comfort

7.3

Boarding

7.7

Overall

7.4

Crew

8.1

Entertainment

7.1

Food

6.6

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
9,204 reviews
United Airlines
7.4
Good
9,204 reviews

Comfort

7.3

Boarding

7.7

Overall

7.4

Crew

8.1

Entertainment

7.1

Food

6.6

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 $495, United Airlines can have you in Portugal from Portland, Maine in 15h 05m. 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, July is the cheapest month in which you can book a flight from Portland, Maine to Portugal (average of $354). Flying from Portland, Maine to Portugal in May is currently the most expensive (average of $450). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Portland to Portugal

See prices for flight routes from nearby airports that may be better suited for you.
Boston to Heathrow flights
Boston to Charles de Gaulle flights
Boston to Leonardo da Vinci/Fiumicino flights
Boston to Gatwick flights
Boston to Dublin flights
Boston to London City flights
Boston to Barcelona-El Prat flights
Boston to Athens flights
Boston to Lisbon flights
Boston to Madrid flights
Boston to Stansted flights
Boston to Orly flights
Boston to Amsterdam flights
Boston to Edinburgh flights
Boston to Zurich flights
Boston to Ponta Delgada flights
Boston to Istanbul flights
Boston to Keflavik Intl flights
Boston to Frankfurt flights
Boston to Luton flights
Boston to Florence flights
Boston to Malpensa flights
Boston to Munich flights
Boston to Porto flights
Boston to Copenhagen flights
Boston to Vicenza flights
Boston to Geneva flights
Boston to Shannon flights
Boston to Linate flights
Boston to Beauvais-Tille flights
Boston to Sabiha Gokcen flights
Boston to Vienna flights
Boston to Glasgow Intl flights
Boston to Prague flights
Boston to Frederic Chopin flights
Boston to Nice flights
Boston to Naples flights
Boston to Ciampino flights
Boston to Tirana flights
Boston to Oslo Gardermoen flights
Boston to Bologna flights
Boston to Bruxelles-National flights
Boston to Funchal flights
Boston to Berlin flights
Boston to Manchester flights
Boston to Málaga flights
Boston to Palma de Mallorca flights
Boston to Palermo flights
Boston to Seville flights
Boston to Arlanda flights

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 January 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$578Average$772FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2026 Cheapflights