What is the cheapest airline that flies from Portland to Portugal?

United Airlines, WestJet, and TAP AIR PORTUGAL are the most popular carriers operating from Portland to Portugal

What airlines fly to Portugal?

TAP AIR PORTUGAL, Azores Airlines and Delta are the top three most popular airlines that fly to Portugal from Portland, Maine according to our data. TAP AIR PORTUGAL is the first choice among our users, with 67% of people opting to fly with this airline when traveling to Portugal. Keep in mind that there are 20 different airlines that fly to Portugal on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Portland Airport to Portugal?

Prices for flights from Portland Airport to Portugal are refreshed on a daily basis.

How many operators does momondo search for flights from Portland Airport to Portugal?

As of May 2026, there is 1 operator available to choose from for flights from Portland Airport to Portugal.

How old do you have to be to fly from Portland Airport to Portugal?

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 Portugal.

What documentation or ID do you need to fly to Portugal?

The travel and health documents required for your trip to Portugal can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Portugal. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$334 Cheap Flights from Portland, Maine to Portugal in 2026

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Find the cheapest flights from Portland, Maine to Portugal

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

2:40 pm - 3:35 pm

PWM

LIS

43h 55m

2 stops

5:55 am - 11:52 pm

LIS

PWM

46h 57m

2 stops

$933Turkish Airlines

Thu, Aug 27 - Sat, Sep 19

6:00 am - 6:45 am

PWM

PDL

20h 45m

1 stop

5:30 pm - 1:35 pm

PDL

PWM

24h 05m

1 stop

$940Multiple Airlines

Sun, Jun 7 - Sun, Jun 14

5:15 am - 9:20 am

PWM

LIS

23h 05m

2 stops

5:05 am - 7:24 pm

LIS

PWM

19h 19m

2 stops

$941United Airlines

Tue, Aug 4 - Tue, Aug 11

6:53 pm - 7:00 am

PWM

OPO

31h 07m

2 stops

12:15 pm - 11:32 pm

OPO

PWM

40h 17m

2 stops

$943Air Canada

Tue, Aug 25 - Sun, Aug 30

5:15 am - 9:20 am

PWM

LIS

23h 05m

2 stops

12:20 pm - 11:59 pm

LIS

PWM

16h 39m

1 stop

$950United Airlines

Tue, Aug 4 - Tue, Aug 11

6:00 am - 10:30 am

PWM

OPO

23h 30m

1 stop

5:00 am - 11:20 pm

OPO

PWM

23h 20m

2 stops

$971KLM

Tue, Aug 25 - Sun, Aug 30

8:15 pm - 6:50 am

PWM

OPO

53h 35m

2 stops

12:15 pm - 9:41 pm

OPO

PWM

38h 26m

2 stops

$974United Airlines

Fri, Jul 3 - Tue, Jul 14

6:20 am - 10:45 am

PWM

LIS

23h 25m

2 stops

11:55 am - 2:19 pm

LIS

PWM

31h 24m

2 stops

$981Delta

Sun, Jul 5 - Tue, Jul 21

2:53 pm - 8:00 am

PWM

LIS

12h 07m

1 stop

8:55 am - 11:59 pm

LIS

PWM

20h 04m

2 stops

$1,043KLM

Thu, Aug 27 - Sat, Sep 19

9:10 am - 7:00 am

PWM

OPO

16h 50m

3 stops

10:00 am - 11:30 pm

OPO

PWM

18h 30m

3 stops

$1,544Air Canada

Fri, Jul 3 - Tue, Jul 14

United Airlines flights from Portland, Maine to Portugal

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

United Airlines

Aug 4

PWM5:15 amPortland

23h 05m

2 stops

LIS9:20 amLisbon Humberto Delgado

Aug 11

LIS5:05 amLisbon Humberto Delgado

19h 19m

2 stops

PWM7:24 pmPortland

$941

United Airlines

Aug 4

PWM5:15 amPortland

23h 05m

2 stops

LIS9:20 amLisbon Humberto Delgado

Aug 11

LIS12:20 pmLisbon Humberto Delgado

16h 39m

1 stop

PWM11:59 pmPortland

$950

United Airlines

Jul 3

PWM8:15 pmPortland

53h 35m

2 stops

OPO6:50 amPorto

Jul 14

OPO12:15 pmPorto

38h 26m

2 stops

PWM9:41 pmPortland

$974

Air France flights from Portland, Maine to Portugal

Our best Air France deals on Portland, Maine to Portugal flight tickets

Air France

Jun 22

PWM12:40 pmPortland

17h 35m

2 stops

LIS11:15 amLisbon Humberto Delgado

Jun 29

LIS6:50 pmLisbon Humberto Delgado

26h 05m

2 stops

PWM3:55 pmPortland

$1,222

Air France

May 24

PWM2:38 pmPortland

15h 37m

2 stops

LIS11:15 amLisbon Humberto Delgado

May 31

LIS6:50 pmLisbon Humberto Delgado

24h 08m

2 stops

PWM1:58 pmPortland

$1,370

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Thu 8/27

2:40 pm-3:35 pm

2 stops43h 55m

Lisbon Humberto Delgado

Sat 9/19

5:55 am-11:52 pm

2 stops46h 57m

$933

PortlandPonta Delgada

PWM - PDL

PWMPDL

Portland

Sun 6/7

6:00 am-6:45 am

1 stop20h 45m

Ponta Delgada Nordela

Sun 6/14

5:30 pm-1:35 pm

1 stop24h 05m

$940

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Tue 8/4

5:15 am-9:20 am

2 stops23h 05m

Lisbon Humberto Delgado

Tue 8/11

5:05 am-7:24 pm

2 stops19h 19m

$941

PortlandPorto

PWM - OPO

PWMOPO

Portland

Tue 8/25

6:53 pm-7:00 am

2 stops31h 07m

Porto

Sun 8/30

12:15 pm-11:32 pm

2 stops40h 17m

$943

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Tue 8/4

5:15 am-9:20 am

2 stops23h 05m

Lisbon Humberto Delgado

Tue 8/11

12:20 pm-11:59 pm

1 stop16h 39m

$950

PortlandPorto

PWM - OPO

PWMOPO

Portland

Tue 8/25

6:00 am-10:30 am

1 stop23h 30m

Porto

Sun 8/30

5:00 am-11:20 pm

2 stops23h 20m

$971

PortlandPorto

PWM - OPO

PWMOPO

Portland

Fri 7/3

8:15 pm-6:50 am

2 stops53h 35m

Porto

Tue 7/14

12:15 pm-9:41 pm

2 stops38h 26m

$974

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Sun 7/5

6:20 am-10:45 am

2 stops23h 25m

Lisbon Humberto Delgado

Tue 7/21

11:55 am-2:19 pm

2 stops31h 24m

$981

Quickest round-trip

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Thu 8/27

2:53 pm-8:00 am

1 stop12h 07m

Lisbon Humberto Delgado

Sat 9/19

8:55 am-11:59 pm

2 stops20h 04m

$1,043

PortlandPorto

PWM - OPO

PWMOPO

Portland

Fri 7/3

9:10 am-7:00 am

3 stops16h 50m

Porto

Tue 7/14

10:00 am-11:30 pm

3 stops18h 30m

$1,544

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted by cheapest first

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

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

What is the cheapest month to fly to Portugal?

The cheapest month to fly to Portugal from Portland, Maine is in June. Flight prices, which tend to average around $0, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of June, then book flights to Portugal from Portland, Maine during May instead. Flights to Portugal in May, while not as cheap as those in June, still average around $0.

Cheap Portland, Maine to Portugal flight deals and tips

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

Fastest flight time	14h 38m
Direct flights	None

The fastest flight from Portland, Maine to Portugal takes 14h 38m

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

Search flight deals

Frequently asked questions about flying from Portland, Maine to Portugal

When did momondo last update prices for flights from Portland Airport to Portugal?
Prices for flights from Portland Airport to Portugal are refreshed on a daily basis.
How many operators does momondo search for flights from Portland Airport to Portugal?
As of May 2026, there is 1 operator available to choose from for flights from Portland Airport to Portugal.
How old do you have to be to fly from Portland Airport to Portugal?
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 Portugal.
What documentation or ID do you need to fly to Portugal?
The travel and health documents required for your trip to Portugal can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Portugal. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Portland, Maine to Portugal

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

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $550	Free Cancellation	Rating 7.4 9,702 reviews		Search United Airlines flights

Why use momondo?

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

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 Portugal for you.

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

Flights from Portland to Portugal with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search for Portland to Portugal 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 Portugal right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Portugal from Portland. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Portugal 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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Popular cities

Other flights from Portland, Maine

Other flights to Portugal

Airlines

Cabin classes

Complete your trip

Feeling lucky

Popular cities in Portugal

Flights to Lisbonfrom $436

Flights to Portofrom $438

Flights to Funchalfrom $607

Flights to Farofrom $622

Flights to Ponta Delgadafrom $542

Flights to Lajesfrom $601

Flights to Pico Islandfrom $663

Flights to Hortafrom $777

Flights to Porto Santofrom $921

Flights to Velasfrom $744

Cheap flights from Portland, Maine to Portugal from $334

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portland, Maine to Portugal departing on 10/25. 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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United Airlines flights from Portland, Maine to Portugal

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Our best Air France deals on Portland, Maine to Portugal flight tickets

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

What is the cheapest month to fly to Portugal?

What is the cheapest airline that flies from Portland to Portugal?

What airlines fly to Portugal?

Cheap Portland, Maine to Portugal flight deals and tips

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

Fastest flight time

Direct flights

Frequently asked questions about flying from Portland, Maine to Portugal

Best airlines flying from Portland, Maine to Portugal

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

Why use momondo?

An easier way to manage your Portugal 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

Popular cities in Portugal

Popular flights according to clicks in the last 7 days on momondo

Portland, Maine flight routes

According to popular flight searches on momondo this year

Portugal flight routes

According to popular flight searches on momondo this year

Fly your favorite airline to Portugal

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Portugal

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

Complete your trip to Portugal

Explore popular destinations other users love

According to popular flight searches on momondo this year