HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Porto

$233+ 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 12/4. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — OPO
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Maine to Porto with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 October 30, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
1 star

Round-trip from

$402
(Air Canada)

One-way from

$233
(Kiwi.com)
Provider with most accurate pricing for Portland-Porto flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Porto flights.
Search Deals
From Maine to Porto
Search Deals
One-way flight from Maine to Porto
Search Deals

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 October 30, 2025.

This United deal was found by Cheapflights users on 10/29. 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.
Sun 11/911:59 amBOS - OPO
1 stop16h 31mMultiple Airlines
Tue 11/259:10 amOPO - BOS
2 stops16h 10mMultiple Airlines
Deal found 10/29$402
This Trip.com deal was found by Cheapflights users on 10/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/2910:25 pmBOS - OPO
1 stop18h 35mTAP AIR PORTUGAL
Fri 12/59:00 amOPO - BOS
1 stop16h 10mTAP AIR PORTUGAL
Deal found 10/30$403
This oojo deal was found by Cheapflights users on 10/30. 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.
Sat 11/2910:25 pmBOS - OPO
1 stop13h 35mTAP AIR PORTUGAL
Sat 12/61:00 pmOPO - BOS
1 stop12h 10mTAP AIR PORTUGAL
Deal found 10/30$404
This Delta deal was found by Cheapflights users on 10/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/39:59 amBOS - OPO
2 stops19h 31mDelta
Tue 12/911:25 amOPO - BOS
2 stops25h 08mDelta
Deal found 10/28$408
This United Airlines deal was found by Cheapflights users on 10/29. 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.
Sun 11/239:30 amBOS - OPO
2 stops19h 00mUnited Airlines
Mon 12/112:30 pmOPO - BOS
1 stop29h 55mUnited Airlines
Deal found 10/29$409
This Mytrip deal was found by Cheapflights users on 10/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/65:30 amBOS - OPO
2 stops24h 45mMultiple Airlines
Tue 1/2012:05 pmOPO - BOS
1 stop13h 15mMultiple Airlines
Deal found 10/29$410
This CrystalTravel deal was found by Cheapflights users on 10/29. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/288:40 pmBOS - OPO
1 stop11h 10mMultiple Airlines
Thu 12/1112:05 pmOPO - BOS
1 stop12h 55mMultiple Airlines
Deal found 10/29$416
This CrystalTravel deal was found by Cheapflights users on 10/29. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/288:40 pmBOS - OPO
1 stop22h 00mMultiple Airlines
Fri 12/512:50 pmOPO - BOS
1 stop12h 10mMultiple Airlines
Deal found 10/29$418
This oojo deal was found by Cheapflights users on 10/29. 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.
Thu 11/2710:45 pmBOS - OPO
1 stop13h 15mTAP AIR PORTUGAL
Thu 12/46:00 pmOPO - BOS
1 stop25h 35mTAP AIR PORTUGAL
Deal found 10/29$419
This oojo deal was found by Cheapflights users on 10/30. 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.
Sat 12/610:25 pmBOS - OPO
1 stop11h 35mTAP AIR PORTUGAL
Wed 12/178:00 pmOPO - BOS
1 stop29h 10mTAP AIR PORTUGAL
Deal found 10/30$424
This Mytrip deal was found by Cheapflights users on 10/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/610:10 pmBOS - OPO
1 stop15h 25mSWISS
Tue 1/2012:05 pmOPO - BOS
1 stop13h 15mSWISS
Deal found 10/29$425
This American Airlines deal was found by Cheapflights users on 10/29. 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.
Fri 11/2811:56 amBOS - OPO
2 stops14h 44mAmerican Airlines
Fri 12/512:25 pmOPO - BOS
1 stop12h 25mAmerican Airlines
Deal found 10/29$429

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 October 30, 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

Wed 12/3

9:59 am-10:30 am

2 stops19h 31m

Porto

Tue 12/9

11:25 am-7:33 am

2 stops25h 08m

$408

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 11/23

9:30 am-9:30 am

2 stops19h 00m

Porto

Mon 12/1

12:30 pm-1:25 pm

1 stop29h 55m

$409

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Mon 11/10

9:59 am-10:30 am

2 stops19h 31m

Porto

Wed 11/19

6:00 am-6:55 pm

2 stops17h 55m

$409

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Thu 11/27

9:40 am-9:30 am

2 stops18h 50m

Porto

Thu 12/4

12:05 pm-8:00 pm

1 stop12h 55m

$423

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 11/26

4:29 pm-3:25 pm

2 stops17h 56m

Porto

Tue 12/2

12:55 pm-2:52 pm

2 stops30h 57m

$435

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Thu 11/27

2:21 pm-9:30 am

2 stops14h 09m

Porto

Thu 12/4

6:00 am-11:41 pm

2 stops22h 41m

$444

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Tue 11/25

7:50 am-11:40 am

2 stops22h 50m

Porto

Mon 12/1

12:30 pm-1:25 pm

1 stop29h 55m

$444

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sat 11/29

8:25 pm-10:30 am

1 stop33h 05m

Porto

Tue 12/9

11:15 am-1:20 pm

1 stop31h 05m

$446

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 11/26

4:29 pm-3:25 pm

2 stops17h 56m

Porto

Mon 12/1

12:30 pm-2:05 pm

2 stops30h 35m

$448

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Thu 11/27

6:30 pm-10:25 am

1 stop10h 55m

Porto

Thu 12/4

11:20 am-10:26 pm

2 stops16h 06m

$453

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 31 results
1
2
3
4

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 19h. Delta provides one of the quickest options available for as low as $409. 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.

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Maine to Porto

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Lisbon flights
Newark to Lisbon flights
Dulles Intl to Lisbon flights
Boston to Lisbon flights
LaGuardia to Lisbon flights
O'Hare Intl to Lisbon flights
San Francisco to Lisbon flights
Miami to Lisbon flights
Los Angeles to Lisbon flights
Newark to Porto flights
Baltimore to Lisbon flights
Reagan-National to Lisbon flights
Dallas/Fort Worth to Lisbon flights
Seattle to Lisbon flights
Philadelphia to Lisbon flights
John F Kennedy Intl to Porto flights
Boston to Ponta Delgada flights
John F Kennedy Intl to Ponta Delgada flights
Atlanta to Lisbon flights
Boston to Porto flights
LaGuardia to Porto flights
Midway to Lisbon flights
Love Field to Lisbon flights
Minneapolis to Lisbon flights
Newark to Ponta Delgada flights
Denver to Lisbon flights
Hobby to Lisbon flights
Orlando to Lisbon flights
Dulles Intl to Porto flights
Fort Lauderdale to Lisbon flights
Santa Ana to Lisbon flights
Raleigh to Lisbon flights
Reagan-National to Porto flights
San Diego to Lisbon flights
George Bush Intcntl to Lisbon flights
John F Kennedy Intl to Faro flights
Atlanta to Porto flights
Newark to Faro flights
John F Kennedy Intl to Funchal flights
Baltimore to Porto flights
Portland to Lisbon flights
Charlotte to Lisbon flights
Detroit to Lisbon flights
Newark to Funchal flights
Sky Harbor Intl to Lisbon flights
Austin to Lisbon flights
O'Hare Intl to Porto flights
Boston to Funchal flights
Tampa to Lisbon flights
LaGuardia to Faro flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.