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

Delta and Air Canada 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 61% of people opting to fly with this airline when traveling to Portugal. Keep in mind that there are 23 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 December 2025, 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.

$423 Cheap Flights from Portland to Portugal in 2025/26

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Find the cheapest flights from Portland, Maine to Portugal

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

3:12 pm - 8:10 am

PWM

LIS

11h 58m1 stop

10:55 am - 6:54 pm

LIS

PWM

36h 59m2 stops

$490United Airlines

Fri, Jan 30 - Fri, Feb 6

7:27 pm - 9:20 am

PWM

LIS

32h 53m2 stops

10:50 am - 11:30 pm

LIS

PWM

41h 40m2 stops

$493Air Canada

Wed, Jan 21 - Sun, Jan 25

2:35 pm - 10:30 am

PWM

OPO

14h 55m2 stops

5:00 am - 12:20 am

OPO

PWM

24h 20m2 stops

$493Delta

Wed, Jan 28 - Sun, Feb 1

2:35 pm - 3:25 pm

PWM

OPO

19h 50m2 stops

4:10 pm - 10:27 pm

OPO

PWM

35h 17m2 stops

$499KLM

Sat, Jan 31 - Sat, Feb 7

2:35 pm - 11:20 am

PWM

LIS

15h 45m2 stops

5:00 am - 10:27 pm

LIS

PWM

22h 27m2 stops

$501Delta

Fri, Jan 30 - Fri, Feb 6

9:40 am - 11:40 am

PWM

OPO

21h 00m2 stops

6:00 am - 6:52 pm

OPO

PWM

17h 52m2 stops

$506United Airlines

Fri, Jan 23 - Tue, Jan 27

6:17 am - 8:00 am

PWM

LIS

20h 43m1 stop

5:00 am - 12:20 am

LIS

PWM

24h 20m2 stops

$581KLM

Thu, Jan 8 - Thu, Jan 15

12:46 pm - 9:05 am

PWM

LIS

15h 19m2 stops

8:20 am - 10:54 pm

LIS

PWM

19h 34m2 stops

$602American Airlines

Thu, Jan 8 - Thu, Jan 15

7:00 am - 7:40 am

PWM

OPO

19h 40m2 stops

8:20 am - 10:54 pm

OPO

PWM

19h 34m2 stops

$810American Airlines

Wed, Jan 28 - Sun, Feb 1

7:00 am - 7:40 am

PWM

OPO

19h 40m2 stops

8:20 am - 10:54 pm

OPO

PWM

19h 34m3 stops

$901Multiple Airlines

Sat, Jan 31 - Sat, Feb 7

United Airlines flights from Portland, Maine to Portugal

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

United Airlines

Jan 30

PWM3:12 pmPortland

11h 58m

1 stop

LIS8:10 amLisbon Humberto Delgado

Feb 6

LIS10:55 amLisbon Humberto Delgado

36h 59m

2 stops

PWM6:54 pmPortland

$490

Find similar

United Airlines

Feb 6

PWM2:31 pmPortland

16h 09m

2 stops

OPO11:40 amPorto

Feb 10

OPO6:00 amPorto

17h 52m

2 stops

PWM6:52 pmPortland

$506

Find similar

United Airlines

Jan 23

PWM3:12 pmPortland

11h 58m

1 stop

LIS8:10 amLisbon Humberto Delgado

Jan 27

LIS10:15 amLisbon Humberto Delgado

33h 16m

2 stops

PWM2:31 pmPortland

$511

Find similar

Air Canada flights from Portland, Maine to Portugal

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

Air Canada

Jan 21

PWM7:27 pmPortland

32h 53m

2 stops

LIS9:20 amLisbon Humberto Delgado

Jan 25

LIS10:50 amLisbon Humberto Delgado

41h 40m

2 stops

PWM11:30 pmPortland

$493

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 00m

2 stops

PWM11:20 pmPortland

$792

Find similar

Air Canada

Jan 30

PWM3:12 pmPortland

18h 58m

3 stops

LIS3:10 pmLisbon Humberto Delgado

Feb 6

LIS8:35 amLisbon Humberto Delgado

19h 55m

3 stops

PWM11:30 pmPortland

$1,011

Find similar

momondo Fare Finder

Use the filters below to find and compare flights from Portland, Maine to Portugal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Fri 1/30

3:12 pm-8:10 am

1 stop11h 58m

Lisbon Humberto Delgado

Fri 2/6

10:55 am-6:54 pm

2 stops36h 59m

$490

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Wed 1/21

7:27 pm-9:20 am

2 stops32h 53m

Lisbon Humberto Delgado

Sun 1/25

10:50 am-11:30 pm

2 stops41h 40m

$493

PortlandPorto

PWM - OPO

PWMOPO

Portland

Wed 1/28

2:35 pm-10:30 am

2 stops14h 55m

Porto

Sun 2/1

5:00 am-12:20 am

2 stops24h 20m

$493

PortlandPorto

PWM - OPO

PWMOPO

Portland

Sat 1/31

2:35 pm-3:25 pm

2 stops19h 50m

Porto

Sat 2/7

4:10 pm-10:27 pm

2 stops35h 17m

$499

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Fri 1/30

2:35 pm-11:20 am

2 stops15h 45m

Lisbon Humberto Delgado

Fri 2/6

5:00 am-10:27 pm

2 stops22h 27m

$501

PortlandPorto

PWM - OPO

PWMOPO

Portland

Fri 1/23

9:40 am-11:40 am

2 stops21h 00m

Porto

Tue 1/27

6:00 am-6:52 pm

2 stops17h 52m

$506

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Thu 1/8

6:17 am-8:00 am

1 stop20h 43m

Lisbon Humberto Delgado

Thu 1/15

5:00 am-12:20 am

2 stops24h 20m

$581

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Thu 1/8

12:46 pm-9:05 am

2 stops15h 19m

Lisbon Humberto Delgado

Thu 1/15

8:20 am-10:54 pm

2 stops19h 34m

$602

PortlandPorto

PWM - OPO

PWMOPO

Portland

Wed 1/28

7:00 am-7:40 am

2 stops19h 40m

Porto

Sun 2/1

8:20 am-10:54 pm

2 stops19h 34m

$810

PortlandPorto

PWM - OPO

PWMOPO

Portland

Sat 1/31

7:00 am-7:40 am

2 stops19h 40m

Porto

Sat 2/7

8:20 am-10:54 pm

3 stops19h 34m

$901

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 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 day to depart on your flight to Portugal?

According to our data, Sunday is the cheapest day to fly to Portugal from Portland, Maine. The lowest ticket price found for a Sunday departure recently was $681. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Portugal is Thursday, with ticket prices averaging around $1,357.

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

Our most recent data shows that the best time of day to fly to Portugal is in the evening. Flights from Portland, Maine to Portugal during this time can be as low as $722. In the afternoon is when there is more demand to fly to Portugal, so prices are often more expensive at around $1,096 per ticket.

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	11h 58m
Direct flights	None

The fastest flight from Portland, Maine to Portugal takes 11h 58m

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

Search flight deals

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 December 2025, 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 $578	Free Cancellation	Rating 7.4 9,091 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.