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 60% 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.

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

KLM, Air Canada, and JetBlue are the most popular carriers operating from Portland 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 November 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.

$447 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

Cheap round-trip flights

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2:30 pm - 9:00 amPWM-LIS

13h 30m1 stop

11:25 am - 11:59 pmLIS-PWM

17h 34m2 stops

$496KLM

Find Deal

Mon, Dec 1 - Mon, Dec 8

2:35 pm - 3:10 pmPWM-LIS

19h 35m2 stops

5:00 am - 12:20 amLIS-PWM

24h 20m2 stops

$500Delta

Find Deal

Thu, Jan 15 - Mon, Jan 19

6:17 am - 8:55 amPWM-LIS

45h 38m2 stops

6:10 pm - 12:20 amLIS-PWM

35h 10m2 stops

$504Scandinavian Airlines

Find Deal

Thu, Jan 15 - Mon, Jan 19

5:45 am - 8:10 amPWM-LIS

22h 25m2 stops

7:25 am - 9:27 pmLIS-PWM

19h 02m2 stops

$540United Airlines

Find Deal

Tue, Mar 17 - Tue, Mar 31

3:12 pm - 8:10 amPWM-LIS

11h 58m1 stop

5:00 am - 6:50 pmLIS-PWM

18h 50m2 stops

$576United Airlines

Find Deal

Thu, Jan 8 - Thu, Jan 15

2:35 pm - 11:20 amPWM-LIS

16h 45m2 stops

5:00 am - 11:49 pmLIS-PWM

23h 49m2 stops

$623Multiple Airlines

Find Deal

Wed, Mar 25 - Wed, Apr 8

6:00 am - 8:55 amPWM-LIS

45h 55m2 stops

11:20 am - 11:20 pmLIS-PWM

41h 00m2 stops

$661Air Canada

Find Deal

Fri, Feb 13 - Sat, Feb 21

8:40 am - 9:20 amPWM-LIS

19h 40m3 stops

11:20 am - 11:30 pmLIS-PWM

17h 10m2 stops

$677Multiple Airlines

Find Deal

Thu, Jan 15 - Mon, Jan 19

6:00 am - 8:55 amPWM-LIS

45h 55m2 stops

11:20 am - 11:20 pmLIS-PWM

41h 00m2 stops

$688Air Canada

Find Deal

Fri, Feb 13 - Sat, Feb 21

2:35 pm - 4:05 pmPWM-LIS

21h 30m2 stops

6:55 am - 11:49 pmLIS-PWM

21h 54m2 stops

$778Scandinavian Airlines

Find Deal

Thu, Mar 26 - Fri, Apr 10

KLM flights from Portland, Maine to Portugal

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

KLM

Dec 1

PWM2:30 pmPortland

13h 30m

1 stop

LIS9:00 amLisbon Humberto Delgado

Dec 8

LIS11:25 amLisbon Humberto Delgado

17h 34m

2 stops

PWM11:59 pmPortland

$496

Find similar

KLM

Dec 1

PWM2:30 pmPortland

13h 30m

1 stop

LIS9:00 amLisbon Humberto Delgado

Dec 8

LIS10:00 amLisbon Humberto Delgado

18h 59m

1 stop

PWM11:59 pmPortland

$506

Find similar

KLM

Dec 1

PWM2:30 pmPortland

13h 30m

1 stop

LIS9:00 amLisbon Humberto Delgado

Dec 8

LIS10:00 amLisbon Humberto Delgado

18h 59m

1 stop

PWM11:59 pmPortland

$599

Find similar

Delta flights from Portland, Maine to Portugal

Our best Delta deals on Portland, Maine to Portugal flight tickets

Delta

Jan 15

PWM2:35 pmPortland

19h 35m

2 stops

LIS3:10 pmLisbon Humberto Delgado

Jan 19

LIS5:00 amLisbon Humberto Delgado

24h 20m

2 stops

PWM12:20 amPortland

$500

Find similar

Delta

Jan 15

PWM2:35 pmPortland

19h 35m

2 stops

LIS3:10 pmLisbon Humberto Delgado

Jan 19

LIS10:00 amLisbon Humberto Delgado

19h 20m

1 stop

PWM12:20 amPortland

$510

Find similar

Delta

Dec 1

PWM12:48 pmPortland

17h 32m

2 stops

LIS11:20 amLisbon Humberto Delgado

Dec 8

LIS11:25 amLisbon Humberto Delgado

17h 34m

2 stops

PWM11:59 pmPortland

$575

Find similar

Fly from

Fly to

Route

Depart

Return

Price

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Mon 12/1

2:30 pm-9:00 am

1 stop13h 30m

Lisbon Humberto Delgado

Mon 12/8

11:25 am-11:59 pm

2 stops17h 34m

$496

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Thu 1/15

2:35 pm-3:10 pm

2 stops19h 35m

Lisbon Humberto Delgado

Mon 1/19

5:00 am-12:20 am

2 stops24h 20m

$500

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Thu 1/15

6:17 am-8:55 am

2 stops45h 38m

Lisbon Humberto Delgado

Mon 1/19

6:10 pm-12:20 am

2 stops35h 10m

$504

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Tue 3/17

5:45 am-8:10 am

2 stops22h 25m

Lisbon Humberto Delgado

Tue 3/31

7:25 am-9:27 pm

2 stops19h 02m

$540

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Thu 1/8

3:12 pm-8:10 am

1 stop11h 58m

Lisbon Humberto Delgado

Thu 1/15

5:00 am-6:50 pm

2 stops18h 50m

$576

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Wed 3/25

2:35 pm-11:20 am

2 stops16h 45m

Lisbon Humberto Delgado

Wed 4/8

5:00 am-11:49 pm

2 stops23h 49m

$623

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Fri 2/13

6:00 am-8:55 am

2 stops45h 55m

Lisbon Humberto Delgado

Sat 2/21

11:20 am-11:20 pm

2 stops41h 00m

$661

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Thu 1/15

8:40 am-9:20 am

3 stops19h 40m

Lisbon Humberto Delgado

Mon 1/19

11:20 am-11:30 pm

2 stops17h 10m

$677

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Fri 2/13

6:00 am-8:55 am

2 stops45h 55m

Lisbon Humberto Delgado

Sat 2/21

11:20 am-11:20 pm

2 stops41h 00m

$688

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Thu 3/26

2:35 pm-4:05 pm

2 stops21h 30m

Lisbon Humberto Delgado

Fri 4/10

6:55 am-11:49 pm

2 stops21h 54m

$778

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 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

Direct flights	None

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 November 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 9,002 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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Find better results for your trip to Portugal

Popular cities in Portugal

Flights to Lisbonfrom $353

Flights to Portofrom $344

Flights to Funchalfrom $389

Flights to Farofrom $380

Flights to Ponta Delgadafrom $401

Flights to Lajesfrom $475

Flights to Hortafrom $563

Flights to Pico Islandfrom $593

Flights to Porto Santofrom $421

Flights to Velasfrom $553

Cheap flights from Portland, Maine to Portugal from $447

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 3/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Portland, Maine to Portugal

Cheap round-trip flights

Cheap one-way flights

KLM flights from Portland, Maine to Portugal

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

Delta flights from Portland, Maine to Portugal

Our best Delta deals on Portland, Maine to Portugal flight tickets

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

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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

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

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

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

KLM, Air Canada, and JetBlue are the most popular carriers operating 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

Direct flights

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

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

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

What documentation or ID do you need to fly 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?

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

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

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

I’m not ready to book a flight from Portland to Portugal right now. Can momondo alert me if 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.

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