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$424+ 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 10/8. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — LIS
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$611
(United Airlines)

One-way from

$424
(Kiwi.com)

Popular in

May

Cheapest in

February
From Portland to Lisbon Humberto Delgado
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One-way flight from Portland to Lisbon Humberto Delgado
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Highest demand for flights based on searches. 31% potential increase in price ($387 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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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 June 12, 2025.

This United Airlines deal was found by Cheapflights users on 6/10. 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.
Mon 12/13:00 pmPWM - LIS
1 stop12h 10mUnited Airlines
Mon 12/811:00 amLIS - PWM
2 stops31h 52mUnited Airlines
Deal found 6/10$611
This American Airlines deal was found by Cheapflights users on 6/12. 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 12/11:06 pmPWM - LIS
1 stop14h 59mAmerican Airlines
Mon 12/811:05 amLIS - PWM
1 stop16h 24mAmerican Airlines
Deal found 6/12$628
This Air Canada deal was found by Cheapflights users on 6/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2410:50 amPWM - LIS
2 stops17h 30mMultiple Airlines
Tue 10/77:55 amLIS - PWM
3 stops20h 18mMultiple Airlines
Deal found 6/11$962
This Air Canada deal was found by Cheapflights users on 6/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2412:13 pmPWM - LIS
3 stops17h 52mAir Canada
Tue 10/77:55 amLIS - PWM
3 stops20h 18mAir Canada
Deal found 6/11$1,061
This FlightHub deal was found by Cheapflights users on 6/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/162:19 pmPWM - LIS
1 stop14h 46mTAP AIR PORTUGAL
Wed 6/188:10 pmLIS - PWM
2 stops32h 42mTAP AIR PORTUGAL
Deal found 6/11$1,460
This Expedia deal was found by Cheapflights users on 6/11. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/166:10 amPWM - LIS
2 stops22h 45mTurkish Airlines
Wed 6/184:30 pmLIS - PWM
2 stops60h 22mTurkish Airlines
Deal found 6/11$1,899

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 June 12, 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

3:00 pm-8:10 am

1 stop12h 10m

Lisbon Humberto Delgado

Mon 12/8

11:00 am-1:52 pm

2 stops31h 52m

$611

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Mon 12/1

1:06 pm-9:05 am

1 stop14h 59m

Lisbon Humberto Delgado

Mon 12/8

11:05 am-10:29 pm

1 stop16h 24m

$628

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Wed 9/24

10:50 am-9:20 am

2 stops17h 30m

Lisbon Humberto Delgado

Tue 10/7

7:55 am-11:13 pm

3 stops20h 18m

$962

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Wed 9/24

12:13 pm-11:05 am

3 stops17h 52m

Lisbon Humberto Delgado

Tue 10/7

7:55 am-11:13 pm

3 stops20h 18m

$1,061

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Wed 10/8

11:16 am-9:50 pm

3 stops29h 34m

$424

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Tue 10/7

2:17 pm-10:05 am

1 stop14h 48m

$448

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Tue 10/7

3:14 pm-9:20 am

2 stops37h 06m

$575

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Wed 10/8

2:17 pm-3:45 pm

2 stops20h 28m

$1,278

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Wed 10/8

2:25 pm-10:30 am

1 stop15h 05m

$2,490

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

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 $1,136). 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 June 12, 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.

Rainfall in Lisbon by month

Plan your trip to Lisbon by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Lisbon ranges from 0.2 - 4.8 inches per month. December is typically the wettest month, when rainfall can reach 4.8 in. July is typically the driest time to visit Lisbon when rainfall is around 0.2 in.

Temperature in Lisbon by month

Plan your trip to Lisbon by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Lisbon, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

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 June 12, 2025.
Singapore Airlines
8.1
Very good
1,302 reviews

Overall

8.1

Food

7.7

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
6.0
Good

Gina,Dec 2024

BLR - SIN

Overall the experience was good. First flight of 17 hours had no entertainment since Singapore airline has technical issues. Was informed that passengers would get a $350 voucher for future flight. Uncertain how that is being distributed but would like to understand if an email is required from my end or if it is an automatic email sent to me by Singapore Airlines. -Gina Robles
Singapore Airlines
8.1
Very good
1,302 reviews
Singapore Airlines
8.1
Very good
1,302 reviews

Overall

8.1

Food

7.7

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
6.0
Good

Gina,Dec 2024

BLR - SIN

Overall the experience was good. First flight of 17 hours had no entertainment since Singapore airline has technical issues. Was informed that passengers would get a $350 voucher for future flight. Uncertain how that is being distributed but would like to understand if an email is required from my end or if it is an automatic email sent to me by Singapore Airlines. -Gina Robles
United Airlines
7.4
Good
8,790 reviews
Singapore Airlines
8.1
Very good
1,302 reviews

Overall

8.1

Food

7.7

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
6.0
Good

Gina,Dec 2024

BLR - SIN

Overall the experience was good. First flight of 17 hours had no entertainment since Singapore airline has technical issues. Was informed that passengers would get a $350 voucher for future flight. Uncertain how that is being distributed but would like to understand if an email is required from my end or if it is an automatic email sent to me by Singapore Airlines. -Gina Robles
American Airlines
7.2
Good
10,000 reviews
Singapore Airlines
8.1
Very good
1,302 reviews

Overall

8.1

Food

7.7

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
6.0
Good

Gina,Dec 2024

BLR - SIN

Overall the experience was good. First flight of 17 hours had no entertainment since Singapore airline has technical issues. Was informed that passengers would get a $350 voucher for future flight. Uncertain how that is being distributed but would like to understand if an email is required from my end or if it is an automatic email sent to me by Singapore Airlines. -Gina Robles
Air Canada
7.1
Good
9,537 reviews
Singapore Airlines
8.1
Very good
1,302 reviews

Overall

8.1

Food

7.7

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
6.0
Good

Gina,Dec 2024

BLR - SIN

Overall the experience was good. First flight of 17 hours had no entertainment since Singapore airline has technical issues. Was informed that passengers would get a $350 voucher for future flight. Uncertain how that is being distributed but would like to understand if an email is required from my end or if it is an automatic email sent to me by Singapore Airlines. -Gina Robles
TAP AIR PORTUGAL
7.1
Good
1,885 reviews
Singapore Airlines
8.1
Very good
1,302 reviews

Overall

8.1

Food

7.7

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
6.0
Good

Gina,Dec 2024

BLR - SIN

Overall the experience was good. First flight of 17 hours had no entertainment since Singapore airline has technical issues. Was informed that passengers would get a $350 voucher for future flight. Uncertain how that is being distributed but would like to understand if an email is required from my end or if it is an automatic email sent to me by Singapore Airlines. -Gina Robles

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.

  • What are the cheapest airlines flying from Portland, Maine to Lisbon round-trip?

    United Airlines, at $611, was found to be the cheapest airline from Portland, Maine to Lisbon.Alternate airlines to your destination round-trip include American Airlines and Air Canada. United Airlines is currently priced 28% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Portland, Maine to Lisbon one-way?

    The cheapest airline one-way is TAP AIR PORTUGAL, with whom users have recently found tickets for as low as $448. However, be on the lookout for offers from Air Canada and Singapore Airlines, as they are both options that can get you from Portland, Maine to Lisbon for a low price.

  • 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 $1,136). 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 Portland?

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

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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$550Average$773FlexibilityNo cancel feeOn-time69%

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