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Porto

$232+ 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 3/8. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — OPO
Mar 23 — Mar 301
Mon 3/23
Mon 3/30
1 adult, Economy
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Cheap 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 February 21, 2026.

This United Airlines deal was found by Cheapflights users on 2/18. 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 2/239:30 am
BOS
-
OPO
2 stops19h 00m
United Airlines
Fri 3/1312:45 pm
OPO
-
BOS
2 stops15h 12m
United Airlines
Deal found 2/18$367
This Kiwi.com deal was found by Cheapflights users on 2/20. 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.
Wed 11/49:50 pm
BOS
-
OPO
1 stop15h 40m
SWISS
Mon 11/97:20 pm
OPO
-
BOS
1 stop30h 00m
SWISS
Deal found 2/20$369
This FlightHub deal was found by Cheapflights users on 2/18. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/199:35 am
BOS
-
OPO
2 stops16h 25m
Multiple Airlines
Mon 11/97:20 pm
OPO
-
BOS
1 stop30h 00m
Multiple Airlines
Deal found 2/18$370
This Kiwi.com deal was found by Cheapflights users on 2/17. 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.
Wed 2/254:45 pm
BOS
-
OPO
1 stop14h 00m
Iberia
Tue 3/38:20 am
OPO
-
BOS
1 stop11h 55m
Iberia
Deal found 2/17$375
This United Airlines deal was found by Cheapflights users on 2/20. 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 2/236:27 pm
BOS
-
OPO
1 stop10h 03m
United Airlines
Wed 3/412:35 pm
OPO
-
BOS
1 stop11h 06m
United Airlines
Deal found 2/20$376
This Kiwi.com deal was found by Cheapflights users on 2/17. 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 2/249:20 pm
BOS
-
OPO
1 stop9h 25m
Iberia
Tue 3/312:25 pm
OPO
-
BOS
1 stop12h 25m
Iberia
Deal found 2/17$377
This Travelocity deal was found by Cheapflights users on 2/18. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/34:45 pm
BOS
-
OPO
1 stop14h 00m
Iberia
Tue 3/178:20 am
OPO
-
BOS
1 stop11h 55m
Iberia
Deal found 2/18$379
This United Airlines deal was found by Cheapflights users on 2/17. 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 10/1410:40 am
BOS
-
OPO
1 stop15h 20m
United Airlines
Wed 10/212:25 pm
OPO
-
BOS
2 stops24h 26m
United Airlines
Deal found 2/17$380
This United Airlines deal was found by Cheapflights users on 2/17. 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 2/259:30 am
BOS
-
OPO
2 stops19h 00m
United Airlines
Wed 3/1112:35 pm
OPO
-
BOS
1 stop11h 40m
United Airlines
Deal found 2/17$381
This American Airlines deal was found by Cheapflights users on 2/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/235:15 pm
BOS
-
OPO
2 stops13h 30m
American Airlines
Thu 3/128:20 am
OPO
-
BOS
2 stops14h 59m
American Airlines
Deal found 2/20$382
This American Airlines deal was found by Cheapflights users on 2/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/223:49 pm
BOS
-
OPO
2 stops14h 56m
American Airlines
Tue 3/312:25 pm
OPO
-
BOS
2 stops15h 23m
American Airlines
Deal found 2/17$384
This United Airlines deal was found by Cheapflights users on 2/19. 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 10/285:06 pm
PWM
-
OPO
1 stop12h 24m
United Airlines
Wed 11/46:00 am
OPO
-
PWM
2 stops20h 27m
United Airlines
Deal found 2/19$499

Find flight deals from Maine to Porto

Keep the following information in mind while searching for Maine to Porto flight deals. Data was last updated February 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$376
(United Airlines)

One-way from

$232
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$416
Provider with most accurate pricing for Boston Logan Intl-Porto flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boston Logan Intl-Porto flights.
Search Deals
From Maine to Porto
Search Deals
One-way flight from Maine to Porto
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($167 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

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 February 21, 2026.
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

Mon 2/23

6:27 pm-9:30 am

1 stop10h 03m

Porto

Thu 3/12

12:35 pm-11:57 pm

2 stops15h 22m

$367

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 3/1

9:30 am-9:30 am

2 stops19h 00m

Porto

Tue 3/10

12:35 pm-9:56 am

2 stops25h 21m

$381

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 3/8

5:45 am-9:30 am

2 stops23h 45m

Porto

Wed 3/18

12:35 pm-8:15 pm

1 stop11h 40m

$381

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Tue 3/3

9:40 am-9:30 am

2 stops18h 50m

Porto

Tue 3/10

12:35 pm-9:41 pm

1 stop13h 06m

$381

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 2/25

2:20 pm-9:30 am

2 stops14h 10m

Porto

Thu 3/5

12:35 pm-6:41 pm

1 stop11h 06m

$381

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 2/25

2:20 pm-9:30 am

2 stops14h 10m

Porto

Fri 3/6

12:45 pm-6:54 pm

1 stop11h 09m

$381

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Tue 2/24

2:20 pm-9:30 am

2 stops14h 10m

Porto

Tue 3/3

12:35 pm-6:41 pm

1 stop11h 06m

$381

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 2/25

7:10 pm-3:25 pm

1 stop15h 15m

Porto

Mon 3/2

11:15 am-1:20 pm

1 stop31h 05m

$410

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Mon 3/9

8:10 pm-10:25 pm

1 stop22h 15m

Porto

Mon 3/16

4:10 pm-2:20 pm

1 stop26h 10m

$410

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 3/4

8:50 pm-7:20 pm

1 stop17h 30m

Porto

Tue 3/17

11:15 am-2:20 pm

1 stop31h 05m

$410

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 28 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 10h 03m. United Airlines provides one of the quickest options available for as low as $367. Maine and Porto are separated by a distance of 3134 mi.

  • 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.

See more FAQs

Traveling to a place near Porto?

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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Maine to Porto

See prices for flight routes from nearby airports that may be better suited for you.
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