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$239+ Cheap flights from Maine to Porto (OPO)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/21. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — OPO
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from Maine to Porto

Keep the following information in mind while searching for Maine to Porto flight deals. Data was last updated September 15, 2025.

Round-trip from

$417
(Kiwi.com)

One-way from

$239
(Kiwi.com)
From Maine to Porto
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One-way flight from Maine to Porto
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Find flight deals from Maine to Porto

Cheapest flights from Maine to Porto
Explore the most affordable flight options available from Maine to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This United Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/54:20 pmBOS - OPO
1 stop14h 20mUnited Airlines
Fri 11/1412:35 pmOPO - BOS
2 stops30h 54mUnited Airlines
Deal found 9/14$420
This Air Canada deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/263:40 pmBOS - OPO
2 stops15h 25mMultiple Airlines
Mon 12/14:15 pmOPO - BOS
2 stops31h 57mMultiple Airlines
Deal found 9/13$422
This United deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1310:40 amBOS - OPO
2 stops17h 50mMultiple Airlines
Tue 12/212:05 pmOPO - BOS
1 stop13h 15mMultiple Airlines
Deal found 9/14$423
This Kiwi.com deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/135:05 pmBOS - OPO
2 stops12h 55mSWISS
Wed 10/2212:20 pmOPO - BOS
1 stop32h 05mSWISS
Deal found 9/13$424
This SWISS deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/39:50 pmBOS - OPO
1 stop32h 25mSWISS
Sun 11/96:35 pmOPO - BOS
2 stops54h 45mSWISS
Deal found 9/14$425
This Kiwi.com deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/145:05 pmBOS - OPO
1 stop13h 25mSWISS
Tue 10/2112:15 pmOPO - BOS
1 stop12h 40mSWISS
Deal found 9/12$426
This United deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/259:13 pmBOS - OPO
1 stop32h 17mMultiple Airlines
Sun 11/96:15 amOPO - BOS
1 stop17h 20mMultiple Airlines
Deal found 9/14$427
This Booking.com deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/155:05 pmBOS - OPO
1 stop20h 25mSWISS
Fri 10/3112:50 pmOPO - BOS
1 stop12h 30mSWISS
Deal found 9/12$428
This United Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/139:05 pmBOS - OPO
1 stop31h 40mUnited Airlines
Wed 10/2212:05 pmOPO - BOS
1 stop13h 05mUnited Airlines
Deal found 9/13$429
This SWISS deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/145:05 pmBOS - OPO
1 stop33h 40mSWISS
Wed 10/228:40 amOPO - BOS
1 stop16h 15mSWISS
Deal found 9/14$430
This Gurufare deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/79:50 pmBOS - OPO
1 stop32h 25mSWISS
Mon 12/229:10 amOPO - BOS
2 stops40h 10mSWISS
Deal found 9/14$431
This oojo deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/145:05 pmBOS - OPO
1 stop13h 25mSWISS
Tue 10/287:25 pmOPO - BOS
1 stop29h 55mSWISS
Deal found 9/14$432

Cheapflights Fare Finder

 
Customize your flight search to find flights from Maine to Porto 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, Cheapflights users made 2,558,603 searches. Data last updated September 15, 2025.
Use the filters below to find and compare flights from Maine to Porto that are best for you.

Fly from

Maine

Fly to

Porto

Route

Depart

Return

Price

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 11/16

9:50 pm-11:15 am

1 stop32h 25m

Porto

Sun 11/30

6:35 pm-8:20 pm

2 stops54h 45m

$425

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Mon 11/3

9:50 pm-11:15 am

1 stop32h 25m

Porto

Sun 11/9

6:35 pm-8:20 pm

2 stops54h 45m

$425

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Mon 10/13

9:05 pm-9:45 am

1 stop31h 40m

Porto

Wed 10/22

12:05 pm-8:10 pm

1 stop13h 05m

$429

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Fri 11/14

4:20 pm-9:30 am

1 stop12h 10m

Porto

Wed 12/3

6:00 am-1:25 pm

1 stop12h 25m

$430

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Mon 10/13

5:05 pm-11:25 am

1 stop13h 20m

Porto

Wed 10/22

8:40 am-7:55 pm

1 stop16h 15m

$430

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Fri 11/14

4:20 pm-9:30 am

1 stop12h 10m

Porto

Tue 12/2

6:00 am-1:25 pm

1 stop12h 25m

$430

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 10/15

5:05 pm-6:30 pm

1 stop20h 25m

Porto

Tue 10/21

8:40 am-7:55 pm

1 stop16h 15m

$430

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Thu 11/13

9:40 am-9:30 am

2 stops18h 50m

Porto

Tue 12/2

6:00 am-1:25 pm

1 stop12h 25m

$434

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sat 11/22

8:40 pm-12:50 pm

1 stop11h 10m

Porto

Wed 12/3

12:10 pm-8:20 pm

1 stop13h 10m

$446

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Mon 10/13

5:05 pm-11:25 am

1 stop13h 20m

Porto

Mon 10/20

6:15 am-5:40 pm

1 stop16h 25m

$447

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 26 results
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Best time to book a flight from Maine to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from Maine with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Maine to Porto
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Maine to Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Porto from Maine?

    Porto (OPO), located 6.8 mi from the city center, is the airport you fly into when you book flights from Maine to Porto.

  • How long is the flight from Maine to Porto?

    A quick flight from Maine to Porto can take about 31h 40m. SWISS provides one of the quickest options available for as low as $429. Maine and Porto are separated by a distance of 3134 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • Can I find deals for flights from Maine to Porto that include hotel bookings?

    Yes. In addition to deals on Maine to Porto flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Maine to Porto?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Maine to Porto.

  • Can I find deals for business class flights from Maine to Porto?

    Yes. Cheapflights offers flight deals from Maine to Porto by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Maine to Porto?

    Currently, January is the cheapest month in which you can book a flight from Maine to Porto (average of $523). Flying from Maine to Porto in June is currently the most expensive (average of $1,027). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Aveiro
Arcos de Valdevez
Coimbra

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