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Cheap flights from Portland, Maine to Portugal from $507

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 5/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Portland, Maine to Portugal

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
3:02 pm - 2:10 pm
PWM
-
LIS
18h 08m
2 stops
Multiple Airlines Logo
7:10 am - 11:27 pm
LIS
-
PWM
21h 17m
2 stops
$716Multiple Airlines
Wed, Apr 29 - Mon, May 4
Multiple Airlines Logo
2:51 pm - 8:00 am
PWM
-
LIS
12h 09m
1 stop
Multiple Airlines Logo
6:50 pm - 2:11 pm
LIS
-
PWM
24h 21m
2 stops
$744Multiple Airlines
Mon, Apr 27 - Mon, May 4
Multiple Airlines Logo
2:51 pm - 10:55 am
PWM
-
LIS
15h 04m
2 stops
Multiple Airlines Logo
6:50 pm - 2:11 pm
LIS
-
PWM
24h 21m
2 stops
$753Multiple Airlines
Mon, Apr 27 - Mon, May 4
United Airlines Logo
3:22 pm - 10:45 pm
PWM
-
LIS
26h 23m
2 stops
United Airlines Logo
5:05 am - 6:37 pm
LIS
-
PWM
18h 32m
2 stops
$759United Airlines
Sun, Apr 19 - Tue, Apr 28
United Airlines Logo
3:22 pm - 10:45 pm
PWM
-
LIS
26h 23m
2 stops
United Airlines Logo
12:20 pm - 10:22 am
LIS
-
PWM
27h 02m
1 stop
$771United Airlines
Sun, Apr 19 - Tue, Apr 28
United Airlines Logo
3:22 pm - 1:40 pm
PWM
-
LIS
17h 18m
2 stops
United Airlines Logo
11:25 am - 10:18 am
LIS
-
PWM
27h 53m
2 stops
$774United Airlines
Wed, Apr 29 - Mon, May 4
Delta Logo
2:51 pm - 2:55 pm
PWM
-
LIS
19h 04m
2 stops
Delta Logo
5:00 am - 12:43 am
LIS
-
PWM
24h 43m
2 stops
$790Delta
Wed, May 6 - Wed, May 13
Turkish Airlines Logo
6:00 am - 3:50 pm
PWM
-
OPO
28h 50m
2 stops
Turkish Airlines Logo
6:30 am - 11:57 pm
OPO
-
PWM
22h 27m
2 stops
$791Turkish Airlines
Sun, May 17 - Mon, Jun 15
KLM Logo
2:51 pm - 8:00 am
PWM
-
LIS
12h 09m
1 stop
KLM Logo
10:00 am - 12:46 am
LIS
-
PWM
19h 46m
1 stop
$798KLM
Mon, Apr 27 - Mon, May 4
Turkish Airlines Logo
6:00 am - 3:50 pm
PWM
-
OPO
28h 50m
2 stops
Turkish Airlines Logo
6:30 am - 11:56 pm
OPO
-
PWM
22h 26m
2 stops
$815Turkish Airlines
Sun, May 17 - Mon, Jun 8

KLM flights from Portland, Maine to Portugal

Our best KLM deals on Portland, Maine to Portugal flight tickets
KLM
Apr 27
PWM2:51 pmPortland
12h 09m
1 stop
LIS8:00 amLisbon Humberto Delgado
May 4
LIS10:00 amLisbon Humberto Delgado
19h 46m
1 stop
PWM12:46 amPortland
$798
KLM
Apr 29
PWM2:51 pmPortland
18h 44m
2 stops
LIS2:35 pmLisbon Humberto Delgado
May 4
LIS10:00 amLisbon Humberto Delgado
19h 46m
1 stop
PWM12:46 amPortland
$806
KLM
May 6
PWM2:51 pmPortland
12h 09m
1 stop
LIS8:00 amLisbon Humberto Delgado
May 13
LIS10:00 amLisbon Humberto Delgado
19h 43m
1 stop
PWM12:43 amPortland
$861

Delta flights from Portland, Maine to Portugal

Our best Delta deals on Portland, Maine to Portugal flight tickets
Delta
May 6
PWM2:51 pmPortland
19h 04m
2 stops
LIS2:55 pmLisbon Humberto Delgado
May 13
LIS5:00 amLisbon Humberto Delgado
24h 43m
2 stops
PWM12:43 amPortland
$790
Delta
May 6
PWM2:51 pmPortland
19h 04m
2 stops
LIS2:55 pmLisbon Humberto Delgado
May 13
LIS10:00 amLisbon Humberto Delgado
19h 43m
1 stop
PWM12:43 amPortland
$801
Delta
Apr 29
PWM2:51 pmPortland
19h 04m
2 stops
LIS2:55 pmLisbon Humberto Delgado
May 4
LIS10:00 amLisbon Humberto Delgado
19h 46m
1 stop
PWM12:46 amPortland
$802

momondo Fare Finder

 
Customize your flight search to find flights from Portland, Maine to Portugal that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated March 23, 2026.
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

Cheapest round-trip

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Wed 4/29

3:02 pm-2:10 pm

2 stops18h 08m

Lisbon Humberto Delgado

Mon 5/4

7:10 am-11:27 pm

2 stops21h 17m

$716

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Mon 4/27

2:51 pm-8:00 am

1 stop12h 09m

Lisbon Humberto Delgado

Mon 5/4

6:50 pm-2:11 pm

2 stops24h 21m

$744

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Mon 4/27

2:51 pm-10:55 am

2 stops15h 04m

Lisbon Humberto Delgado

Mon 5/4

6:50 pm-2:11 pm

2 stops24h 21m

$753

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Sun 4/19

3:22 pm-10:45 pm

2 stops26h 23m

Lisbon Humberto Delgado

Tue 4/28

5:05 am-6:37 pm

2 stops18h 32m

$759

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Sun 4/19

3:22 pm-10:45 pm

2 stops26h 23m

Lisbon Humberto Delgado

Tue 4/28

12:20 pm-10:22 am

1 stop27h 02m

$771

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Wed 4/29

3:22 pm-1:40 pm

2 stops17h 18m

Lisbon Humberto Delgado

Mon 5/4

11:25 am-10:18 am

2 stops27h 53m

$774

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Wed 5/6

2:51 pm-2:55 pm

2 stops19h 04m

Lisbon Humberto Delgado

Wed 5/13

5:00 am-12:43 am

2 stops24h 43m

$790

PortlandPorto

PWM - OPO

PWMOPO

Portland

Sun 5/17

6:00 am-3:50 pm

2 stops28h 50m

Porto

Mon 6/15

6:30 am-11:57 pm

2 stops22h 27m

$791
Quickest round-trip

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Mon 4/27

2:51 pm-8:00 am

1 stop12h 09m

Lisbon Humberto Delgado

Mon 5/4

10:00 am-12:46 am

1 stop19h 46m

$798

PortlandPorto

PWM - OPO

PWMOPO

Portland

Sun 5/17

6:00 am-3:50 pm

2 stops28h 50m

Porto

Mon 6/8

6:30 am-11:56 pm

2 stops22h 26m

$815

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 airline that flies from Portland to Portugal?

WestJet, American Airlines, and United Airlines 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 65% 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.

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

19h 04m

Direct flights

None
The fastest flight from Portland, Maine to Portugal takes 19h 04m
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?

  • 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 AirlinesPriceFrom $550Free CancellationRating
7.4
9,462 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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1 adult
Wed 4/22
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Find better results for your trip to Portugal

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