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

Washington, D.C. (IAD) was the most common stop: 67% of momondo users choosing 1-stop flights on this route connected there.

What airlines fly to Lisbon?

TAP AIR PORTUGAL, Delta and Virgin Atlantic 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 63% of people opting to fly with this airline when traveling to Lisbon. Keep in mind that there are 18 different airlines that fly to Lisbon on a routine basis, so you have a few additional options to choose from.

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

Flights via Washington, D.C. (IAD) offer the lowest average round-trip price of $910.

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 52m.

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 09m.

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 August 2026.

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.

$746 Cheap Flights from Portland, Maine to Lisbon in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Portland, Maine to Lisbon

Round-trip

One-way

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Cheap round-trip flights

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7:44 pm - 8:10 amPWM Portland-LIS Lisbon Humberto Delgado

31h 26m1 stop Newark

11:20 am - 1:52 pmLIS Lisbon Humberto Delgado-PWM Portland

55h 32m2 stops Toronto Pearson Intl Chicago O'Hare Intl

$746United Airlines

Tue, Dec 29 - Wed, Jan 6

5:15 am - 10:30 amPWM Portland-LIS Lisbon Humberto Delgado

24h 15m1 stop Washington, D.C. Dulles Intl

6:45 am - 11:59 pmLIS Lisbon Humberto Delgado-PWM Portland

22h 14m2 stops Frankfurt am Main Washington, D.C. Dulles Intl

$775United Airlines

Tue, Sep 22 - Tue, Sep 29

6:00 am - 8:10 amPWM Portland-LIS Lisbon Humberto Delgado

21h 10m1 stop Newark

11:20 am - 1:52 pmLIS Lisbon Humberto Delgado-PWM Portland

55h 32m2 stops Toronto Pearson Intl Chicago O'Hare Intl

$785United Airlines

Mon, Jan 11 - Thu, Jan 14

3:15 pm - 8:10 amPWM Portland-LIS Lisbon Humberto Delgado

11h 55m1 stop Newark

10:15 am - 10:57 pmLIS Lisbon Humberto Delgado-PWM Portland

17h 42m1 stop Newark

$790United Airlines

Mon, Jan 11 - Thu, Jan 14

4:48 pm - 8:10 amPWM Portland-LIS Lisbon Humberto Delgado

34h 22m2 stops Chicago O'Hare Intl Newark

11:20 am - 1:52 pmLIS Lisbon Humberto Delgado-PWM Portland

55h 32m2 stops Toronto Pearson Intl Chicago O'Hare Intl

$796United Airlines

Mon, Jan 11 - Thu, Jan 14

4:20 pm - 2:55 pmPWM Portland-LIS Lisbon Humberto Delgado

17h 35m2 stops New York John F Kennedy Intl Paris Charles de Gaulle

5:00 am - 11:56 pmLIS Lisbon Humberto Delgado-PWM Portland

23h 56m2 stops Amsterdam Schiphol New York John F Kennedy Intl

$840Multiple Airlines

Thu, Sep 24 - Thu, Oct 1

9:45 am - 9:20 amPWM Portland-LIS Lisbon Humberto Delgado

42h 35m2 stops Chicago O'Hare Intl Toronto Pearson Intl

12:50 pm - 1:38 pmLIS Lisbon Humberto Delgado-PWM Portland

29h 48m2 stops Montreal Pierre Elliott Trudeau Intl Newark

$844United Airlines

Sat, Jan 9 - Tue, Jan 12

4:48 pm - 9:20 amPWM Portland-LIS Lisbon Humberto Delgado

35h 32m2 stops Chicago O'Hare Intl Toronto Pearson Intl

11:20 am - 9:27 pmLIS Lisbon Humberto Delgado-PWM Portland

39h 07m2 stops Toronto Pearson Intl Chicago O'Hare Intl

$849United Airlines

Sat, Jan 9 - Tue, Jan 12

4:50 pm - 3:10 pmPWM Portland-LIS Lisbon Humberto Delgado

17h 20m2 stops Detroit Metropolitan Wayne County Paris Charles de Gaulle

11:30 am - 11:49 pmLIS Lisbon Humberto Delgado-PWM Portland

17h 19m2 stops Amsterdam Schiphol New York John F Kennedy Intl

$850Multiple Airlines

Tue, Dec 29 - Wed, Jan 6

5:06 pm - 8:10 amPWM Portland-LIS Lisbon Humberto Delgado

10h 04m1 stop Newark

5:00 am - 6:13 pmLIS Lisbon Humberto Delgado-PWM Portland

18h 13m2 stops Frankfurt am Main Newark

$895United Airlines

Sat, Jan 9 - Tue, Jan 12

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KLM flights from Portland, Maine to Lisbon

Our best KLM deals on Portland, Maine to Lisbon flight tickets

KLM

Aug 16

PWM11:50 amPortland

18h 05m

2 stops

LIS10:55 amLisbon Humberto Delgado

Aug 24

LIS7:45 pmLisbon Humberto Delgado

25h 16m

2 stops

PWM4:01 pmPortland

$993

KLM

Dec 28

PWM2:35 pmPortland

19h 05m

2 stops

LIS2:40 pmLisbon Humberto Delgado

Jan 4

LIS5:00 amLisbon Humberto Delgado

23h 49m

2 stops

PWM11:49 pmPortland

$1,066

American Airlines flights from Portland, Maine to Lisbon

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

American Airlines

Sep 8

PWM6:46 pmPortland

9h 19m

1 stop

LIS9:05 amLisbon Humberto Delgado

Sep 15

LIS7:10 amLisbon Humberto Delgado

17h 28m

2 stops

PWM7:38 pmPortland

$1,008

American Airlines

Aug 16

PWM6:46 pmPortland

16h 39m

2 stops

LIS4:25 pmLisbon Humberto Delgado

Aug 24

LIS11:05 amLisbon Humberto Delgado

15h 16m

1 stop

PWM9:21 pmPortland

$1,052

American Airlines

Aug 16

PWM7:33 amPortland

20h 32m

1 stop

LIS9:05 amLisbon Humberto Delgado

Aug 24

LIS11:05 amLisbon Humberto Delgado

15h 16m

1 stop

PWM9:21 pmPortland

$1,055

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandLisbon

PWM Portland - LIS Lisbon Humberto Delgado

PWMLIS

Portland

Tue 12/29

7:44 pm-8:10 am

1 stop31h 26m

Lisbon Humberto Delgado

Wed 1/6

11:20 am-1:52 pm

2 stops55h 32m

$746

PortlandLisbon

PWM Portland - LIS Lisbon Humberto Delgado

PWMLIS

Portland

Tue 9/22

5:15 am-10:30 am

1 stop24h 15m

Lisbon Humberto Delgado

Tue 9/29

6:45 am-11:59 pm

2 stops22h 14m

$775

PortlandLisbon

PWM Portland - LIS Lisbon Humberto Delgado

PWMLIS

Portland

Mon 1/11

6:00 am-8:10 am

1 stop21h 10m

Lisbon Humberto Delgado

Thu 1/14

11:20 am-1:52 pm

2 stops55h 32m

$785

PortlandLisbon

PWM Portland - LIS Lisbon Humberto Delgado

PWMLIS

Portland

Mon 1/11

3:15 pm-8:10 am

1 stop11h 55m

Lisbon Humberto Delgado

Thu 1/14

10:15 am-10:57 pm

1 stop17h 42m

$790

PortlandLisbon

PWM Portland - LIS Lisbon Humberto Delgado

PWMLIS

Portland

Mon 1/11

4:48 pm-8:10 am

2 stops34h 22m

Lisbon Humberto Delgado

Thu 1/14

11:20 am-1:52 pm

2 stops55h 32m

$796

PortlandLisbon

PWM Portland - LIS Lisbon Humberto Delgado

PWMLIS

Portland

Thu 9/24

4:20 pm-2:55 pm

2 stops17h 35m

Lisbon Humberto Delgado

Thu 10/1

5:00 am-11:56 pm

2 stops23h 56m

$840

PortlandLisbon

PWM Portland - LIS Lisbon Humberto Delgado

PWMLIS

Portland

Sat 1/9

9:45 am-9:20 am

2 stops42h 35m

Lisbon Humberto Delgado

Tue 1/12

12:50 pm-1:38 pm

2 stops29h 48m

$844

PortlandLisbon

PWM Portland - LIS Lisbon Humberto Delgado

PWMLIS

Portland

Sat 1/9

4:48 pm-9:20 am

2 stops35h 32m

Lisbon Humberto Delgado

Tue 1/12

11:20 am-9:27 pm

2 stops39h 07m

$849

PortlandLisbon

PWM Portland - LIS Lisbon Humberto Delgado

PWMLIS

Portland

Tue 12/29

4:50 pm-3:10 pm

2 stops17h 20m

Lisbon Humberto Delgado

Wed 1/6

11:30 am-11:49 pm

2 stops17h 19m

$850

Quickest round-trip

PortlandLisbon

PWM Portland - LIS Lisbon Humberto Delgado

PWMLIS

Portland

Sat 1/9

5:06 pm-8:10 am

1 stop10h 04m

Lisbon Humberto Delgado

Tue 1/12

5:00 am-6:13 pm

2 stops18h 13m

$895

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 month to fly to Lisbon?

In general, June is the cheapest month to fly from Portland, Maine to Lisbon. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $0. If you are unable to visit Lisbon during the month of June, then departing from Portland, Maine during the month May is also very affordable. Most momondo users find prices during this month for around $0.

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

Fastest flight time	14h 35m
Direct flights	None

The fastest flight from Portland, Maine to Lisbon takes 14h 35m

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

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Frequently asked questions about flying from Portland, Maine to Lisbon

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 14h 35m 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 August 2026.
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 $550	Free Cancellation	Rating 7.4 10,114 reviews		Search United Airlines flights

Sintra

Fátima

Figueira da Foz

Setúbal

Nazaré

Estoril

Evora

Ericeira

Peniche

Óbidos

Tomar

Batalha

Leiria

Oeiras

Sesimbra

Zambujeira do Mar

Torres Vedras

Comporta

Sines

Caldas da Rainha

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 $746

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 12/29. 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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KLM flights from Portland, Maine to Lisbon

Our best KLM deals on Portland, Maine to Lisbon flight tickets

American Airlines flights from Portland, Maine to Lisbon

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

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

What is the cheapest month to fly to Lisbon?

What airlines fly to Lisbon?

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

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

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

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

When to book flights from Portland, Maine to Lisbon

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

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Frequently asked questions about flying 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?

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.

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Find better results for your trip to Portugal

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Fly your favorite airline to Lisbon

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List of cabin classes available on flights landing in Lisbon. Availability may vary depending on flight origin and airline.

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