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 58% of people opting to fly with this airline when traveling to Portugal. Keep in mind that there are 22 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?

United Airlines, KLM, and Air Canada 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 September 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.

$443 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

2:30 pm - 9:00 amPWM-LIS

13h 30m1 stop

10:00 am - 11:59 pmLIS-PWM

18h 59m1 stop

$527KLM

Find Deal

Mon, Dec 1 - Mon, Dec 8

2:30 pm - 9:00 amPWM-LIS

13h 30m1 stop

11:15 am - 11:59 pmLIS-PWM

17h 44m2 stops

$532Multiple Airlines

Find Deal

Mon, Dec 1 - Mon, Dec 8

2:30 pm - 2:35 pmPWM-LIS

19h 05m2 stops

5:00 am - 10:17 pmLIS-PWM

22h 17m2 stops

$560Delta

Find Deal

Mon, Dec 1 - Mon, Dec 8

2:30 pm - 2:35 pmPWM-LIS

19h 05m2 stops

5:30 am - 11:59 pmLIS-PWM

23h 29m2 stops

$583Delta

Find Deal

Mon, Dec 1 - Mon, Dec 8

4:16 pm - 9:05 amPWM-LIS

11h 49m1 stop

11:05 am - 12:05 pmLIS-PWM

30h 00m1 stop

$655American Airlines

Find Deal

Sat, Jan 17 - Sun, Jan 25

6:00 am - 8:55 amPWM-LIS

45h 55m2 stops

11:20 am - 11:21 pmLIS-PWM

41h 01m2 stops

$662Air Canada

Find Deal

Fri, Feb 13 - Sat, Feb 21

6:00 am - 11:05 amPWM-LIS

24h 05m2 stops

11:25 am - 11:59 pmLIS-PWM

41h 34m2 stops

$707United Airlines

Find Deal

Tue, Oct 14 - Tue, Oct 21

3:50 pm - 9:05 amPWM-LIS

13h 15m1 stop

10:40 am - 10:54 pmLIS-PWM

17h 14m1 stop

$862American Airlines

Find Deal

Sat, Nov 1 - Sat, Nov 8

5:30 am - 8:55 amPWM-LIS

23h 25m2 stops

6:10 am - 11:17 pmLIS-PWM

22h 07m2 stops

$874United Airlines

Find Deal

Sat, Nov 1 - Sat, Nov 8

9:00 am - 8:55 amPWM-LIS

18h 55m3 stops

8:35 am - 11:30 pmLIS-PWM

19h 55m3 stops

$1,007Air Canada

Find Deal

Sat, Jan 17 - Sun, Jan 25

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

LIS10:00 amLisbon Humberto Delgado

18h 59m

1 stop

PWM11:59 pmPortland

$527

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

$548

Find similar

KLM

Oct 14

PWM6:50 amPortland

20h 10m

1 stop

LIS8:00 amLisbon Humberto Delgado

Oct 21

LIS10:00 amLisbon Humberto Delgado

19h 05m

1 stop

PWM12:05 amPortland

$694

Find similar

Delta flights from Portland, Maine to Portugal

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

Delta

Dec 1

PWM2:30 pmPortland

19h 05m

2 stops

LIS2:35 pmLisbon Humberto Delgado

Dec 8

LIS5:00 amLisbon Humberto Delgado

22h 17m

2 stops

PWM10:17 pmPortland

$560

Find similar

Delta

Dec 1

PWM2:30 pmPortland

19h 05m

2 stops

LIS2:35 pmLisbon Humberto Delgado

Dec 8

LIS5:30 amLisbon Humberto Delgado

23h 29m

2 stops

PWM11:59 pmPortland

$583

Find similar

Delta

Oct 4

PWM6:33 pmPortland

19h 07m

2 stops

LIS6:40 pmLisbon Humberto Delgado

Oct 22

LIS5:00 amLisbon Humberto Delgado

22h 19m

2 stops

PWM10:19 pmPortland

$622

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

Mon 12/1

2:30 pm-9:00 am

1 stop13h 30m

Lisbon Humberto Delgado

Mon 12/8

10:00 am-11:59 pm

1 stop18h 59m

$527

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Mon 12/1

2:30 pm-9:00 am

1 stop13h 30m

Lisbon Humberto Delgado

Mon 12/8

11:15 am-11:59 pm

2 stops17h 44m

$532

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Mon 12/1

2:30 pm-2:35 pm

2 stops19h 05m

Lisbon Humberto Delgado

Mon 12/8

5:00 am-10:17 pm

2 stops22h 17m

$560

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Mon 12/1

2:30 pm-2:35 pm

2 stops19h 05m

Lisbon Humberto Delgado

Mon 12/8

5:30 am-11:59 pm

2 stops23h 29m

$583

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Sat 1/17

4:16 pm-9:05 am

1 stop11h 49m

Lisbon Humberto Delgado

Sun 1/25

11:05 am-12:05 pm

1 stop30h 00m

$655

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-11:21 pm

2 stops41h 01m

$662

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Tue 10/14

6:00 am-11:05 am

2 stops24h 05m

Lisbon Humberto Delgado

Tue 10/21

11:25 am-11:59 pm

2 stops41h 34m

$707

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Sat 11/1

3:50 pm-9:05 am

1 stop13h 15m

Lisbon Humberto Delgado

Sat 11/8

10:40 am-10:54 pm

1 stop17h 14m

$862

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Sat 11/1

5:30 am-8:55 am

2 stops23h 25m

Lisbon Humberto Delgado

Sat 11/8

6:10 am-11:17 pm

2 stops22h 07m

$874

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Sat 1/17

9:00 am-8:55 am

3 stops18h 55m

Lisbon Humberto Delgado

Sun 1/25

8:35 am-11:30 pm

3 stops19h 55m

$1,007

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 September 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 8,926 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 $360

Flights to Portofrom $354

Flights to Funchalfrom $416

Flights to Farofrom $405

Flights to Ponta Delgadafrom $417

Flights to Lajesfrom $426

Flights to Hortafrom $577

Flights to Pico Islandfrom $585

Flights to Porto Santofrom $582

Flights to Velasfrom $576

Cheap flights from Portland, Maine to Portugal from $443

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

Cheap last minute 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

momondo Fare Finder

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

See travel insights to Portugal from

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?

United Airlines, KLM, and Air Canada 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