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Lisbon

$475+ Cheap flights from Portland, ME (PWM) to Lisbon (LIS)

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 8/22. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — LIS
Aug 26 — Sep 21
Wed 8/26
Wed 9/2
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 July 27, 2026.

This KLM deal was found by Cheapflights users on 7/27. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/24:15 pm
PWM
-
LIS
1 stop10h 45m
KLM
Tue 11/1011:30 am
LIS
-
PWM
2 stops17h 25m
KLM
Deal found 7/27$720
This Air France deal was found by Cheapflights users on 7/27. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/24:45 pm
PWM
-
LIS
2 stops17h 25m
Multiple Airlines
Tue 11/1011:30 am
LIS
-
PWM
2 stops17h 25m
Multiple Airlines
Deal found 7/27$724
This Air France deal was found by Cheapflights users on 7/27. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/24:15 pm
PWM
-
LIS
1 stop10h 45m
Air France
Tue 11/1010:00 am
LIS
-
PWM
1 stop18h 55m
Air France
Deal found 7/27$731
This United Airlines deal was found by Cheapflights users on 7/26. 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.
Sun 12/65:06 pm
PWM
-
LIS
1 stop10h 04m
United Airlines
Wed 12/911:20 am
LIS
-
PWM
2 stops40h 37m
United Airlines
Deal found 7/26$779
This Air Canada deal was found by Cheapflights users on 7/22. 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.
Sun 12/66:00 am
PWM
-
LIS
2 stops47h 40m
Air Canada
Wed 12/911:20 am
LIS
-
PWM
2 stops40h 37m
Air Canada
Deal found 7/22$787
This United Airlines deal was found by Cheapflights users on 7/25. 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.
Sun 11/225:08 pm
PWM
-
LIS
2 stops36h 32m
United Airlines
Thu 11/265:00 am
LIS
-
PWM
2 stops33h 00m
United Airlines
Deal found 7/25$796
This United Airlines deal was found by Cheapflights users on 7/25. 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.
Sun 11/225:08 pm
PWM
-
LIS
2 stops36h 32m
United Airlines
Fri 11/2710:15 am
LIS
-
PWM
2 stops13h 47m
United Airlines
Deal found 7/25$807
This Delta deal was found by Cheapflights users on 7/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/214:40 pm
PWM
-
LIS
2 stops37h 40m
Delta
Thu 11/2611:30 am
LIS
-
PWM
2 stops41h 25m
Delta
Deal found 7/25$834

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 July 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$720
(KLM)

One-way from

$475
(United Airlines)

Popular in

December

Cheapest in

February

Average price

$1,131
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 Lisbon Humberto Delgado
Search Deals
One-way flight from Portland to Lisbon Humberto Delgado
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($110 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 11% potential price decrease ($116 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

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 July 27, 2026.
Use the filters below to find and compare flights from Portland to Lisbon that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Mon 11/2

4:15 pm-8:00 am

1 stop10h 45m

Lisbon Humberto Delgado

Tue 11/10

11:30 am-11:55 pm

2 stops17h 25m

$720

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Sun 12/6

5:06 pm-8:10 am

1 stop10h 04m

Lisbon Humberto Delgado

Wed 12/9

11:20 am-10:57 pm

2 stops40h 37m

$779

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Sun 12/6

6:00 am-10:40 am

2 stops47h 40m

Lisbon Humberto Delgado

Wed 12/9

11:20 am-10:57 pm

2 stops40h 37m

$787
Cheapest one-way

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Sat 8/22

6:53 pm-8:20 am

1 stop32h 27m

$475

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Sat 8/22

6:00 am-11:05 am

2 stops48h 05m

$483
Quickest one-way

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Sat 8/22

2:40 pm-10:15 am

1 stop14h 35m

$541

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Sat 8/22

2:40 pm-10:15 am

1 stop14h 35m

$549

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/24

Sorted by cheapest first
  • Most accurate provider: When it comes to deals on Portland, Maine-Lisbon flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland, Maine-Lisbon flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.

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 July 27, 2026.
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
10,041 reviews

Entertainment

7.1

Boarding

7.7

Food

6.6

Comfort

7.3

Overall

7.4

Crew

8.1

Reviews

1 / 20
6.0
Good

ROHIT,Jun 2026

IND - EWR

It should not be delayed by 2 hours. I missed the important event due to this
United Airlines
7.4
Good
10,041 reviews
United Airlines
7.4
Good
10,041 reviews

Entertainment

7.1

Boarding

7.7

Food

6.6

Comfort

7.3

Overall

7.4

Crew

8.1

Reviews

1 / 20
6.0
Good

ROHIT,Jun 2026

IND - EWR

It should not be delayed by 2 hours. I missed the important event due to this

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 10h 04m. KLM provides one of the quickest options available for as low as $779. 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 $550, was found to be the cheapest airline from Portland, Maine to Lisbon.. United Airlines is currently priced 50% 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.

See more FAQs

Traveling to a place near Lisbon?

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

Browse thousands of different options on Cheapflights for your next trip

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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 July 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$550Average$707FlexibilityNo cancel feeOn-time69%

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