HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Portugal

$447+ 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
Nov 27 — Dec 41
Thu 11/27
Thu 12/4
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.

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 October 28, 2025.

This United Airlines deal was found by Cheapflights users on 10/27. 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 12/310:02 amPWM - LIS
1 stop19h 13mUnited Airlines
Mon 12/85:00 amLIS - PWM
2 stops45h 17mUnited Airlines
Deal found 10/27$554
This United Airlines deal was found by Cheapflights users on 10/27. 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 12/112:13 pmPWM - LIS
1 stop15h 02mUnited Airlines
Thu 12/1810:55 amLIS - PWM
2 stops42h 04mUnited Airlines
Deal found 10/27$576
This United Airlines deal was found by Cheapflights users on 10/28. 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 12/17:22 pmPWM - LIS
1 stop9h 53mUnited Airlines
Mon 12/811:20 amLIS - PWM
2 stops38h 57mUnited Airlines
Deal found 10/28$582
This KLM deal was found by Cheapflights users on 10/28. 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 12/12:30 pmPWM - LIS
1 stop13h 30mKLM
Mon 12/810:00 amLIS - PWM
1 stop18h 59mKLM
Deal found 10/28$599
This Delta deal was found by Cheapflights users on 10/27. 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.
Thu 11/134:53 pmPWM - LIS
2 stops19h 37mDelta
Sat 11/225:00 amLIS - PWM
2 stops23h 54mDelta
Deal found 10/27$643
This Delta deal was found by Cheapflights users on 10/27. 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 12/14:53 pmPWM - LIS
2 stops19h 37mDelta
Mon 12/811:25 amLIS - PWM
2 stops17h 34mDelta
Deal found 10/27$646
This United Airlines deal was found by Cheapflights users on 10/27. 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 11/139:54 amPWM - LIS
1 stop19h 21mUnited Airlines
Sat 11/225:00 amLIS - PWM
2 stops21h 50mUnited Airlines
Deal found 10/27$675
This United Airlines deal was found by Cheapflights users on 10/28. 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 12/123:20 pmPWM - OPO
2 stops14h 40mUnited Airlines
Fri 12/199:00 amOPO - PWM
2 stops14h 51mUnited Airlines
Deal found 10/28$926
This TAP AIR PORTUGAL deal was found by Cheapflights users on 10/25. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/77:46 pmPWM - PDL
2 stops18h 49mMultiple Airlines
Fri 11/146:30 amPDL - PWM
2 stops20h 35mMultiple Airlines
Deal found 10/25$1,875

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 October 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$538
(Expedia)

One-way from

$447
(KLM)

Popular in

May

Cheapest in

February

Average price

$945
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. 27% potential increase in price ($345 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($67 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 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 October 28, 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 1/18

6:30 am-5:20 pm

2 stops29h 50m

Lisbon Humberto Delgado

Sun 1/25

4:55 pm-11:49 pm

2 stops35h 54m

$504

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Wed 12/3

10:02 am-10:15 am

1 stop19h 13m

Lisbon Humberto Delgado

Mon 12/8

5:00 am-9:17 pm

2 stops45h 17m

$554

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Thu 1/8

3:12 pm-8:10 am

1 stop11h 58m

Lisbon Humberto Delgado

Thu 1/15

5:00 am-6:50 pm

2 stops18h 50m

$575

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Thu 12/11

2:13 pm-10:15 am

1 stop15h 02m

Lisbon Humberto Delgado

Thu 12/18

10:55 am-11:59 pm

2 stops42h 04m

$576

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-9:17 pm

2 stops38h 57m

$582

PortlandPorto

PWM - OPO

PWMOPO

Portland

Fri 3/27

7:10 pm-9:30 am

1 stop10h 20m

Porto

Tue 3/31

6:00 am-6:20 pm

2 stops17h 20m

$723

PortlandPorto

PWM - OPO

PWMOPO

Portland

Fri 3/27

6:30 am-10:30 am

2 stops24h 00m

Porto

Tue 3/31

5:00 am-11:49 pm

2 stops23h 49m

$845

PortlandPorto

PWM - OPO

PWMOPO

Portland

Fri 12/12

3:20 pm-11:00 am

2 stops14h 40m

Porto

Fri 12/19

9:00 am-6:51 pm

2 stops14h 51m

$926

PortlandPonta Delgada

PWM - PDL

PWMPDL

Portland

Fri 11/7

7:46 pm-6:35 pm

2 stops18h 49m

Ponta Delgada Nordela

Fri 11/14

6:30 am-11:05 pm

2 stops20h 35m

$1,875

PortlandPonta Delgada

PWM - PDL

PWMPDL

Portland

Sun 3/29

2:35 pm-4:05 pm

2 stops45h 30m

Ponta Delgada Nordela

Thu 4/2

7:30 am-1:51 pm

2 stops34h 21m

$8,791

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

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, February is the cheapest month in which you can book a flight from Portland, Maine to Portugal (average of $336). 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 October 28, 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 at noon tend to be the most expensive. A flight in the evening could potentially save you up to 34% 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 October 28, 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
9,001 reviews

Boarding

7.7

Crew

8.1

Overall

7.4

Comfort

7.3

Food

6.6

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
9,001 reviews
United Airlines
7.4
Good
9,001 reviews

Boarding

7.7

Crew

8.1

Overall

7.4

Comfort

7.3

Food

6.6

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

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 $554, Scandinavian Airlines can have you in Portugal from Portland, Maine in 19h 13m. 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 $336). 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

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 Gatwick flights
Boston to Leonardo da Vinci/Fiumicino flights
Boston to Dublin flights
Boston to London City flights
Boston to Lisbon flights
Boston to Madrid flights
Boston to Orly flights
Boston to Frankfurt flights
Boston to Stansted flights
Boston to Amsterdam flights
Boston to Luton flights
Boston to Istanbul flights
Boston to Zurich flights
Boston to Barcelona-El Prat flights
Boston to Munich flights
Boston to Keflavik Intl flights
Boston to Athens flights
Boston to Copenhagen flights
Boston to Florence flights
Boston to Beauvais-Tille flights
Boston to Ponta Delgada flights
Boston to Edinburgh flights
Boston to Malpensa flights
Boston to Sabiha Gokcen flights
Boston to Vicenza flights
Boston to Prague flights
Boston to Vienna flights
Boston to Linate flights
Boston to Glasgow Intl flights
Boston to Geneva flights
Boston to Berlin flights
Boston to Porto flights
Boston to Shannon flights
Boston to Bruxelles-National flights
Boston to Ciampino flights
Boston to Naples flights
Boston to Frankfurt-Hahn flights
Boston to Bologna flights
Boston to Málaga flights
Boston to Basel flights
Boston to Bergamo flights
Boston to Oslo Gardermoen flights
Boston to Frederic Chopin flights
Boston to Tirana flights
Boston to Arlanda flights
Boston to Budapest flights
Boston to Southend flights
Boston to Manchester 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 October 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$578Average$778FlexibilityNo 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.