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Lisbon

$599+ 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 12/1. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — LIS
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap 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 September 11, 2025.

Round-trip from

$599
(American Airlines)

Popular in

May

Cheapest in

February

Average price

$857
From Portland to Lisbon Humberto Delgado
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Highest demand for flights based on searches. 31% potential increase in price ($390 potential increase over avg. RT price).
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Cheapest flight prices on average. 9% potential price decrease ($73 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 11, 2025.

This American Airlines deal was found by Cheapflights users on 9/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/16:37 pmPWM - LIS
1 stop9h 28mAmerican Airlines
Mon 12/811:05 amLIS - PWM
1 stop12h 08mAmerican Airlines
Deal found 9/11$599
This Delta deal was found by Cheapflights users on 9/10. 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 10/46:33 pmPWM - LIS
2 stops19h 07mDelta
Wed 10/225:40 amLIS - PWM
2 stops21h 39mDelta
Deal found 9/10$740
This KLM deal was found by Cheapflights users on 9/9. 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 10/42:41 pmPWM - LIS
2 stops15h 14mMultiple Airlines
Wed 10/225:40 amLIS - PWM
2 stops21h 39mMultiple Airlines
Deal found 9/9$751
This Air France deal was found by Cheapflights users on 9/9. 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 12/12:30 pmPWM - LIS
2 stops12h 30mAir France
Mon 12/811:15 amLIS - PWM
2 stops17h 44mAir France
Deal found 9/9$756
This United Airlines deal was found by Cheapflights users on 9/11. 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.
Mon 12/13:00 pmPWM - LIS
2 stops14h 15mUnited Airlines
Mon 12/810:15 amLIS - PWM
2 stops13h 39mUnited Airlines
Deal found 9/11$785
This United Airlines deal was found by Cheapflights users on 9/9. 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 10/245:41 pmPWM - LIS
1 stop9h 39mUnited Airlines
Fri 10/315:00 amLIS - PWM
2 stops20h 50mUnited Airlines
Deal found 9/9$807
This United Airlines deal was found by Cheapflights users on 9/10. 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 10/45:45 amPWM - LIS
1 stop23h 50mUnited Airlines
Wed 10/2210:25 amLIS - PWM
2 stops18h 34mUnited Airlines
Deal found 9/10$874
This oojo deal was found by Cheapflights users on 9/8. 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.
Sat 9/207:09 amPWM - LIS
2 stops45h 46mTurkish Airlines
Tue 9/304:45 pmLIS - PWM
2 stops34h 21mTurkish Airlines
Deal found 9/8$1,002

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 September 11, 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

Mon 12/1

6:37 pm-9:05 am

1 stop9h 28m

Lisbon Humberto Delgado

Mon 12/8

11:05 am-11:37 pm

2 stops17h 32m

$604

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Wed 2/18

6:00 am-8:10 am

1 stop21h 10m

Lisbon Humberto Delgado

Sat 2/28

11:20 am-10:48 am

2 stops52h 28m

$617

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Wed 2/18

2:45 pm-8:10 am

2 stops12h 25m

Lisbon Humberto Delgado

Sat 2/28

5:00 am-6:13 pm

2 stops18h 13m

$623

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Sat 10/4

6:33 pm-6:40 pm

2 stops19h 07m

Lisbon Humberto Delgado

Wed 10/22

5:40 am-10:19 pm

2 stops21h 39m

$740

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Sat 10/4

2:41 pm-10:55 am

2 stops15h 14m

Lisbon Humberto Delgado

Wed 10/22

5:40 am-10:19 pm

2 stops21h 39m

$751

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Mon 12/1

2:30 pm-8:00 am

2 stops12h 30m

Lisbon Humberto Delgado

Mon 12/8

11:15 am-11:59 pm

2 stops17h 44m

$756

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Fri 2/13

6:00 am-8:55 am

2 stops45h 55m

Lisbon Humberto Delgado

Sat 2/21

11:20 am-10:48 am

2 stops52h 28m

$785

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Mon 12/1

3:00 pm-10:15 am

2 stops14h 15m

Lisbon Humberto Delgado

Mon 12/8

10:15 am-6:54 pm

2 stops13h 39m

$785

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

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, January is the cheapest month in which you can book a flight from Portland, Maine to Lisbon (average of $612). Flying from Portland, Maine to Lisbon in June is currently the most expensive (average of $1,127). 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 September 11, 2025.

It’s typically best to fly out from Portland, Maine to Lisbon in the evening. Doing so could potentially save you 35% 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 September 11, 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
8,937 reviews

Comfort

7.3

Overall

7.4

Boarding

7.7

Food

6.6

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,937 reviews
United Airlines
7.4
Good
8,937 reviews

Comfort

7.3

Overall

7.4

Boarding

7.7

Food

6.6

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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 9h 28m. American Airlines provides one of the quickest options available for as low as $604. 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 $572, was found to be the cheapest airline from Portland, Maine to Lisbon.. United Airlines is currently priced 32% 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, January is the cheapest month in which you can book a flight from Portland, Maine to Lisbon (average of $612). Flying from Portland, Maine to Lisbon in June is currently the most expensive (average of $1,127). 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
Sintra
Fátima
Oeiras
Beja
Nazaré
Ericeira
Costa da Caparica
Torres Vedras
Sesimbra
Colares

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.

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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$572Average$773FlexibilityNo cancel feeOn-time69%

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