Which layover airport offers the lowest fares from Portland, Maine to Lisbon?

Flights via Newark (EWR) offer the lowest average round-trip price of $578.

What airlines fly to Lisbon?

TAP AIR PORTUGAL, Delta and Air France are the top three most popular airlines that fly to Lisbon from Portland, Maine according to our data. TAP AIR PORTUGAL is the first choice among our users, with 60% of people opting to fly with this airline when traveling to Lisbon. Keep in mind that there are 23 different airlines that fly to Lisbon on a routine basis, so you have a few additional options to choose from.

Which layover airport has the shortest connection time from Portland, Maine to Lisbon?

Washington, D.C. (IAD) has the shortest average layover time for this route: 1h 51m.

Which layover airport has the shortest travel time from Portland, Maine to Lisbon?

Flights connecting via Washington, D.C. (IAD) have the shortest average one-way travel time: 11h 04m.

Which airport is the most popular layover for flights between Portland, Maine and Lisbon?

Washington, D.C. (IAD) was the most common stop: 83% of momondo users choosing 1-stop flights on this route connected there.

When did momondo last update prices for flights from Portland Airport to Lisbon Humberto Delgado Airport?

Prices for flights from Portland Airport to Lisbon Humberto Delgado Airport refresh daily.

How many operators does momondo search for flights from Portland Airport to Lisbon Humberto Delgado Airport?

There is 1 operator available for flights from Portland Airport to Lisbon Humberto Delgado Airport as of October 2025.

How old do you have to be to fly from Portland Airport to Lisbon Humberto Delgado Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Portland Airport to Lisbon Humberto Delgado Airport.

What documentation or ID do you need to fly to Lisbon Humberto Delgado Airport?

The necessary travel and health documents for your Lisbon Humberto Delgado Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$535 Cheap Flights from Portland to Lisbon in 2025/26

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7:30 pm - 10:15 amPWM-LIS

9h 45m1 stop

5:00 am - 6:50 pmLIS-PWM

18h 50m2 stops

$535United Airlines

Find Deal

Wed, Dec 31 - Fri, Jan 9

2:55 pm - 10:15 amPWM-LIS

14h 20m2 stops

5:00 am - 6:50 pmLIS-PWM

18h 50m2 stops

$540United Airlines

Find Deal

Wed, Dec 31 - Fri, Jan 9

3:12 pm - 9:20 amPWM-LIS

37h 08m2 stops

10:55 am - 9:01 amLIS-PWM

51h 06m2 stops

$546Air Canada

Find Deal

Tue, Jan 6 - Thu, Jan 15

3:38 pm - 12:10 pmPWM-LIS

16h 32m2 stops

11:05 am - 10:54 pmLIS-PWM

16h 49m1 stop

$549American Airlines

Find Deal

Wed, Oct 29 - Wed, Nov 5

3:38 pm - 12:10 pmPWM-LIS

16h 32m2 stops

11:05 am - 11:59 pmLIS-PWM

17h 54m2 stops

$554American Airlines

Find Deal

Wed, Oct 29 - Wed, Nov 5

7:22 pm - 10:15 amPWM-LIS

9h 53m1 stop

11:20 am - 6:54 pmLIS-PWM

36h 34m2 stops

$582United Airlines

Find Deal

Mon, Dec 1 - Mon, Dec 8

6:00 am - 9:20 amPWM-LIS

22h 20m2 stops

11:20 am - 6:42 pmLIS-PWM

36h 22m2 stops

$589Air Canada

Find Deal

Fri, Nov 28 - Fri, Dec 5

11:25 am - 10:45 amPWM-LIS

18h 20m2 stops

11:40 am - 1:51 pmLIS-PWM

31h 11m2 stops

$607Delta

Find Deal

Wed, Apr 1 - Sun, Apr 5

7:00 am - 8:00 amPWM-LIS

20h 00m2 stops

11:25 am - 11:49 pmLIS-PWM

17h 24m2 stops

$640Delta

Find Deal

Fri, Jan 2 - Thu, Jan 8

6:00 am - 9:20 amPWM-LIS

22h 20m2 stops

10:55 am - 11:21 pmLIS-PWM

17h 26m2 stops

$721Multiple Airlines

Find Deal

Fri, Feb 13 - Fri, Feb 20

United Airlines flights from Portland, Maine to Lisbon

Our best United Airlines deals on Portland, Maine to Lisbon flight tickets

United Airlines

Dec 31

PWM7:30 pmPortland

9h 45m

1 stop

LIS10:15 amLisbon Humberto Delgado

Jan 9

LIS5:00 amLisbon Humberto Delgado

18h 50m

2 stops

PWM6:50 pmPortland

$535

Find similar

United Airlines

Dec 31

PWM2:55 pmPortland

14h 20m

2 stops

LIS10:15 amLisbon Humberto Delgado

Jan 9

LIS5:00 amLisbon Humberto Delgado

18h 50m

2 stops

PWM6:50 pmPortland

$540

Find similar

United Airlines

Dec 1

PWM7:22 pmPortland

9h 53m

1 stop

LIS10:15 amLisbon Humberto Delgado

Dec 8

LIS11:20 amLisbon Humberto Delgado

36h 34m

2 stops

PWM6:54 pmPortland

$582

Find similar

Air Canada flights from Portland, Maine to Lisbon

Our best Air Canada deals on Portland, Maine to Lisbon flight tickets

Air Canada

Jan 6

PWM3:12 pmPortland

37h 08m

2 stops

LIS9:20 amLisbon Humberto Delgado

Jan 15

LIS10:55 amLisbon Humberto Delgado

51h 06m

2 stops

PWM9:01 amPortland

$546

Find similar

Air Canada

Nov 28

PWM6:00 amPortland

22h 20m

2 stops

LIS9:20 amLisbon Humberto Delgado

Dec 5

LIS11:20 amLisbon Humberto Delgado

36h 22m

2 stops

PWM6:42 pmPortland

$589

Find similar

Air Canada

Feb 13

PWM6:00 amPortland

45h 55m

2 stops

LIS8:55 amLisbon Humberto Delgado

Feb 21

LIS11:20 amLisbon Humberto Delgado

41h 01m

2 stops

PWM11:21 pmPortland

$646

Find similar

Fly from

Fly to

Route

Depart

Return

Price

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Wed 12/31

7:30 pm-10:15 am

1 stop9h 45m

Lisbon Humberto Delgado

Fri 1/9

5:00 am-6:50 pm

2 stops18h 50m

$535

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Wed 12/31

2:55 pm-10:15 am

2 stops14h 20m

Lisbon Humberto Delgado

Fri 1/9

5:00 am-6:50 pm

2 stops18h 50m

$540

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Tue 1/6

3:12 pm-9:20 am

2 stops37h 08m

Lisbon Humberto Delgado

Thu 1/15

10:55 am-9:01 am

2 stops51h 06m

$546

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Wed 10/29

3:38 pm-12:10 pm

2 stops16h 32m

Lisbon Humberto Delgado

Wed 11/5

11:05 am-10:54 pm

1 stop16h 49m

$549

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Wed 10/29

3:38 pm-12:10 pm

2 stops16h 32m

Lisbon Humberto Delgado

Wed 11/5

11:05 am-11:59 pm

2 stops17h 54m

$554

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-6:54 pm

2 stops36h 34m

$582

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Fri 11/28

6:00 am-9:20 am

2 stops22h 20m

Lisbon Humberto Delgado

Fri 12/5

11:20 am-6:42 pm

2 stops36h 22m

$589

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Wed 4/1

11:25 am-10:45 am

2 stops18h 20m

Lisbon Humberto Delgado

Sun 4/5

11:40 am-1:51 pm

2 stops31h 11m

$607

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Fri 1/2

7:00 am-8:00 am

2 stops20h 00m

Lisbon Humberto Delgado

Thu 1/8

11:25 am-11:49 pm

2 stops17h 24m

$640

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Fri 2/13

6:00 am-9:20 am

2 stops22h 20m

Lisbon Humberto Delgado

Fri 2/20

10:55 am-11:21 pm

2 stops17h 26m

$721

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from Portland, Maine to Lisbon

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Layovers

What is the cheapest day to depart on your flight to Lisbon?

Our data shows that Monday is the least expensive day to fly to Lisbon. Tickets to fly out on this day can be as low as $782. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from Portland, Maine to Lisbon for around $868.

What is the cheapest time of day to depart on your flight to Lisbon?

The cheapest time of day to fly to Lisbon is at noon when flights can be purchased for as low as $351. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $823 on average. Flights to Lisbon from Portland, Maine in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

When to book flights from Portland, Maine to Lisbon

Are you open to changing your travel dates? Check out the ideal times to fly from Portland, Maine to Lisbon according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Portland, Maine to Lisbon (PWM to LIS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portland, Maine to Lisbon

Direct flights	None

There are no direct flights from Portland, Maine to Lisbon. There are no popular flight routes from Portland, Maine to Lisbon.

Search flight deals

How far is Portland to Lisbon Humberto Delgado by plane?
A flight from Portland to Lisbon Humberto Delgado will travel around 3121.9 mi. Typically, this will take 9h 28m by plane in normal conditions.
When did momondo last update prices for flights from Portland Airport to Lisbon Humberto Delgado Airport?
Prices for flights from Portland Airport to Lisbon Humberto Delgado Airport refresh daily.
How many operators does momondo search for flights from Portland Airport to Lisbon Humberto Delgado Airport?
There is 1 operator available for flights from Portland Airport to Lisbon Humberto Delgado Airport as of October 2025.
How old do you have to be to fly from Portland Airport to Lisbon Humberto Delgado Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Portland Airport to Lisbon Humberto Delgado Airport.
What documentation or ID do you need to fly to Lisbon Humberto Delgado Airport?
The necessary travel and health documents for your Lisbon Humberto Delgado Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Portland, Maine to Lisbon?
Based on momondo bookings for flights between Portland, Maine and Lisbon, the leading airline is United Airlines, making up 100% of the total bookings.

Best airlines flying from Portland, Maine to Lisbon

Compare and see reviews for airlines that fly from Portland, Maine to Lisbon with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $578	Free Cancellation	Rating 7.4 8,982 reviews		Search United Airlines flights

Sintra

Fátima

Ericeira

Nazaré

Oeiras

Setúbal

Peniche

Almada

Estoril

Leiria

Sesimbra

Tomar

Evora

Zambujeira do Mar

Batalha

Figueira da Foz

Óbidos

Torres Vedras

Comporta

Sines

Why use momondo?

Why should I use momondo to find a flight deal from Portland to Lisbon?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Portland to Lisbon for you.

Can I find flights from Portland to Lisbon with flexible booking policies on momondo?

momondo does allow users to show only those flights to Lisbon from Portland which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Portland to Lisbon?

Once you have performed a search for Portland to Lisbon flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Portland to Lisbon right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Lisbon, momondo offers a useful price alert feature which will track prices for flights to Lisbon from Portland and alert you when they change.

An easier way to manage your Lisbon trip

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Cheap flights from Portland, Maine to Lisbon from $535

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Portland, Maine to Lisbon departing on 12/31. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Filter for what you want

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Find the cheapest flights from Portland, Maine to Lisbon

Cheap round-trip flights

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United Airlines flights from Portland, Maine to Lisbon

Our best United Airlines deals on Portland, Maine to Lisbon flight tickets

Air Canada flights from Portland, Maine to Lisbon

Our best Air Canada deals on Portland, Maine to Lisbon flight tickets

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How to get the cheapest flight ticket from Portland, Maine to Lisbon

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Lisbon?

Our data shows that Monday is the least expensive day to fly to Lisbon. Tickets to fly out on this day can be as low as $782. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from Portland, Maine to Lisbon for around $868.

What is the cheapest time of day to depart on your flight to Lisbon?

What airlines fly to Lisbon?

Which airport is the most popular layover for flights between Portland, Maine and Lisbon?

Washington, D.C. (IAD) was the most common stop: 83% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Portland, Maine to Lisbon?

Flights via Newark (EWR) offer the lowest average round-trip price of $578.

Which layover airport has the shortest travel time from Portland, Maine to Lisbon?

Flights connecting via Washington, D.C. (IAD) have the shortest average one-way travel time: 11h 04m.

Which layover airport has the shortest connection time from Portland, Maine to Lisbon?

Washington, D.C. (IAD) has the shortest average layover time for this route: 1h 51m.

When to book flights from Portland, Maine to Lisbon

Cheap Portland, Maine to Lisbon (PWM to LIS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portland, Maine to Lisbon

Direct flights

How far is Portland to Lisbon Humberto Delgado by plane?

When did momondo last update prices for flights from Portland Airport to Lisbon Humberto Delgado Airport?

How many operators does momondo search for flights from Portland Airport to Lisbon Humberto Delgado Airport?

How old do you have to be to fly from Portland Airport to Lisbon Humberto Delgado Airport?

What documentation or ID do you need to fly to Lisbon Humberto Delgado Airport?

What is the most popular airline from Portland, Maine to Lisbon?

Best airlines flying from Portland, Maine to Lisbon

Compare and see reviews for airlines that fly from Portland, Maine to Lisbon with momondo

Traveling to a place near Lisbon?

Why use momondo?

Why should I use momondo to find a flight deal from Portland to Lisbon?

Can I find flights from Portland to Lisbon with flexible booking policies on momondo?

How can momondo help me find flights from Portland to Lisbon?

I’m not ready to book a flight from Portland to Lisbon right now. Can momondo alert me if prices change?

An easier way to manage your Lisbon trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Portugal

Airports servicing Portugal