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$481+ Cheap flights from Portland, ME (PWM) to Lisbon (LIS)

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 1/12. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — LIS
ene. 14 — ene. 211
mié. 1/14
mié. 1/21
1 adult, Economy
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Cheap flight deals from Portland to Lisbon

Cheapest flights from Portland to Lisbon
Explore the most affordable flight options available from Portland to Lisbon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on diciembre 15, 2025.

This United Airlines deal was found by Cheapflights users on 12/14. 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.
sáb. 12/2010:19 amPWM - LIS
1 stop18h 56mUnited Airlines
sáb. 12/275:00 amLIS - PWM
2 stops33h 44mUnited Airlines
Deal found 12/14$1,789
This United Airlines deal was found by Cheapflights users on 12/14. 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.
vie. 12/1910:19 amPWM - LIS
1 stop18h 56mUnited Airlines
lun. 12/296:10 amLIS - PWM
2 stops22h 12mUnited Airlines
Deal found 12/14$1,791
This Delta deal was found by Cheapflights users on 12/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/231:03 pmPWM - LIS
1 stop14h 57mDelta
jue. 1/15:00 amLIS - PWM
2 stops22h 43mDelta
Deal found 12/14$2,386
This United Airlines deal was found by Cheapflights users on 12/15. 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.
mar. 12/237:30 pmPWM - LIS
1 stop9h 45mUnited Airlines
jue. 1/111:55 amLIS - PWM
1 stop31h 45mUnited Airlines
Deal found 12/15$2,616
This United Airlines deal was found by Cheapflights users on 12/15. 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.
lun. 12/222:55 pmPWM - LIS
1 stop12h 15mUnited Airlines
sáb. 1/311:55 amLIS - PWM
1 stop17h 04mUnited Airlines
Deal found 12/15$2,786

Find flight deals from Portland to Lisbon

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PWM) to Lisbon (LIS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated diciembre 15, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$481
(Expedia)

Popular in

December

Cheapest in

February

Average price

$4,577
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 Lisbon Humberto Delgado
Search Deals
Highest demand for flights based on searches. 37% potential increase in price ($751 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 37% potential price decrease ($335 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland to Lisbon 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 diciembre 15, 2025.
Use the filters below to find and compare flights from Portland to Lisbon that are best for you.

Fly from

Portland

Fly to

Lisbon

Route

Depart

Return

Price

PortlandLisbon

PWM - LIS

PWMLIS

Portland

lun. 1/12

7:27 pm-9:20 am

2 stops32h 53m

Lisbon Humberto Delgado

lun. 1/19

11:20 am-1:56 pm

2 stops31h 36m

$481

PortlandLisbon

PWM - LIS

PWMLIS

Portland

mié. 1/28

2:31 pm-9:20 am

2 stops37h 49m

Lisbon Humberto Delgado

mié. 2/4

11:20 am-2:31 pm

2 stops32h 11m

$493

PortlandLisbon

PWM - LIS

PWMLIS

Portland

mié. 1/21

7:27 pm-9:20 am

2 stops32h 53m

Lisbon Humberto Delgado

dom. 1/25

10:50 am-11:30 pm

2 stops41h 40m

$493

PortlandLisbon

PWM - LIS

PWMLIS

Portland

mié. 1/28

2:35 pm-8:00 am

1 stop12h 25m

Lisbon Humberto Delgado

mié. 2/4

5:00 am-12:20 am

2 stops24h 20m

$497

PortlandLisbon

PWM - LIS

PWMLIS

Portland

sáb. 1/10

2:35 pm-11:20 am

2 stops15h 45m

Lisbon Humberto Delgado

sáb. 1/17

10:00 am-11:59 pm

1 stop18h 59m

$510

PortlandLisbon

PWM - LIS

PWMLIS

Portland

jue. 1/8

2:35 pm-8:00 am

1 stop12h 25m

Lisbon Humberto Delgado

jue. 1/15

3:30 pm-12:20 am

2 stops37h 50m

$580

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/13

Compare providers for flights from Portland to Lisbon

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Portland to Lisbon in December.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Portland, Maine-Lisbon flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Portland, Maine-Lisbon flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Portland, Maine-Lisbon flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Portland, Maine-Lisbon flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Portland, Maine-Lisbon flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Portland to Lisbon

Have a flexible travel schedule? Discover the best time to fly to Lisbon 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 Lisbon

What is the cheapest month to book a flight from Portland, Maine to Lisbon?

Currently, February is the cheapest month in which you can book a flight from Portland, Maine to Lisbon (average of $350). Flying from Portland, Maine to Lisbon in June is currently the most expensive (average of $594). 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 LIS?

Find hourly flight availability from Portland to Lisbon. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated diciembre 15, 2025.

It’s typically best to fly out from Portland, Maine to Lisbon in the evening. Doing so could potentially save you 34% on the flight price compared to flying in the afternoon, which is usually more expensive.

How much does it cost to fly round-trip from Portland, Maine to Lisbon?

Reviews of airlines servicing Lisbon

Get insights into the airlines that provide service to Lisbon. 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 Lisbon. Reviews last updated diciembre 15, 2025.
See what other customers who have flown with United Airlines from Portland to Lisbon 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
9,092 reviews

Boarding

7.7

Crew

8.1

Entertainment

7.1

Comfort

7.3

Overall

7.4

Food

6.6

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
United Airlines
7.4
Good
9,092 reviews
United Airlines
7.4
Good
9,092 reviews

Boarding

7.7

Crew

8.1

Entertainment

7.1

Comfort

7.3

Overall

7.4

Food

6.6

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.

Related info for your journey

Find useful and relevant information for your journey from Portland to Lisbon. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Portland, Maine to Lisbon?

    A quick flight from Portland, Maine to Lisbon can take about 12h 25m. Air Canada provides one of the quickest options available for as low as $497. Portland, Maine and Lisbon are separated by a distance of 3123 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What is the cheapest airline to fly from Portland, Maine to Lisbon round-trip?

    United Airlines, at $578, was found to be the cheapest airline from Portland, Maine to Lisbon.. United Airlines is currently priced 53% below the average price you’ll pay for this route.

  • Can I find deals for flights from Portland to Lisbon that include hotel bookings?

    Yes. In addition to deals on Portland to Lisbon flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Portland to Lisbon?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Lisbon.

  • Can I find deals for business class flights from Portland to Lisbon?

    Yes. Cheapflights offers flight deals from Portland to Lisbon 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 Lisbon?

    Currently, February is the cheapest month in which you can book a flight from Portland, Maine to Lisbon (average of $350). Flying from Portland, Maine to Lisbon in June is currently the most expensive (average of $594). 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

Traveling to a place near Lisbon?

Book flights to Lisbon if you plan to visit one of these locations
Fátima
Oeiras
Ericeira
Costa da Caparica
Torres Vedras
Beja
Nazaré
Sesimbra
Colares

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Top airline flying from Portland to Lisbon

Discover the top airline that operate flights from Portland to Lisbon. 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 diciembre 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$578Average$778FlexibilityNo cancel feeOn-time69%

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