HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Porto

$295+ 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 8/29. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — OPO
Apr 29 — May 61
Tue 4/29
Tue 5/6
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 April 24, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
2 stars

Round-trip from

$599
(Scandinavian Airlines)

One-way from

$322
(PLAY)
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 April 24, 2025.

This SWISS deal was found by Cheapflights users on 4/23. 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.
Thu 11/279:55 pmBOS - OPO
1 stop28h 55mSWISS
Thu 2/127:30 pmOPO - BOS
1 stop29h 50mSWISS
Deal found 4/23$598
This Scandinavian Airlines deal was found by Cheapflights users on 4/23. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/285:40 pmBOS - OPO
1 stop18h 25mScandinavian Airlines
Fri 9/125:55 pmOPO - BOS
1 stop26h 40mScandinavian Airlines
Deal found 4/23$599
This Kiwi.com deal was found by Cheapflights users on 4/23. 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.
Sun 5/1111:55 pmBOS - OPO
1 stop26h 05mMultiple Airlines
Wed 5/1410:00 pmOPO - BOS
1 stop28h 05mMultiple Airlines
Deal found 4/23$600
This FlightHub deal was found by Cheapflights users on 4/23. 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.
Sun 8/36:10 pmBOS - OPO
1 stop9h 50mTAP AIR PORTUGAL
Thu 8/2110:25 pmOPO - BOS
1 stop20h 55mTAP AIR PORTUGAL
Deal found 4/23$602
This Air Canada deal was found by Cheapflights users on 4/23. 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.
Sun 11/305:40 pmBOS - OPO
2 stops37h 00mAir Canada
Sun 2/86:00 amOPO - BOS
2 stops35h 12mAir Canada
Deal found 4/23$603
This Delta deal was found by Cheapflights users on 4/22. 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.
Thu 11/279:55 amBOS - OPO
2 stops19h 55mDelta
Mon 1/1211:15 amOPO - BOS
1 stop31h 05mDelta
Deal found 4/22$605
This Lufthansa deal was found by Cheapflights users on 4/23. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/284:15 pmBOS - OPO
1 stop18h 00mLufthansa
Wed 2/116:00 amOPO - BOS
1 stop12h 25mLufthansa
Deal found 4/23$611
This Cheapflightsfares deal was found by Cheapflights users on 4/23. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/169:20 pmBOS - OPO
1 stop9h 20mIberia
Wed 9/178:15 amOPO - BOS
1 stop11h 45mIberia
Deal found 4/23$613
This British Airways deal was found by Cheapflights users on 4/22. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/36:25 pmBOS - OPO
1 stop16h 40mBritish Airways
Wed 1/146:30 pmOPO - BOS
1 stop30h 05mBritish Airways
Deal found 4/22$617
This United Airlines deal was found by Cheapflights users on 4/23. 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 8/45:50 amBOS - OPO
1 stop22h 45mUnited Airlines
Thu 8/2112:10 pmOPO - BOS
1 stop26h 25mUnited Airlines
Deal found 4/23$624
This Gotogate deal was found by Cheapflights users on 4/23. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2810:50 pmBOS - OPO
1 stop12h 25mVueling
Fri 5/21:40 pmOPO - BOS
1 stop12h 25mVueling
Deal found 4/23$660
This Austrian Airlines deal was found by Cheapflights users on 4/23. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/299:30 amBOS - OPO
2 stops43h 05mAustrian Airlines
Thu 9/410:25 amOPO - BOS
2 stops37h 30mAustrian Airlines
Deal found 4/23$674

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 April 24, 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

Thu 8/28

5:40 pm-5:05 pm

1 stop18h 25m

Porto

Fri 9/12

5:55 pm-3:35 pm

1 stop26h 40m

$599

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 5/11

11:55 pm-7:00 am

1 stop26h 05m

Porto

Wed 5/14

10:00 pm-9:05 pm

1 stop28h 05m

$600

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 8/3

6:10 pm-9:00 am

1 stop9h 50m

Porto

Thu 8/21

10:25 pm-2:20 pm

1 stop20h 55m

$602

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 7/16

9:20 pm-11:40 am

1 stop9h 20m

Porto

Wed 9/17

8:15 am-3:00 pm

1 stop11h 45m

$613

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Mon 9/22

6:30 pm-9:35 am

1 stop10h 05m

Porto

Thu 10/9

6:00 am-2:31 pm

2 stops37h 31m

$620

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Mon 8/4

5:50 am-9:35 am

1 stop22h 45m

Porto

Thu 8/21

12:10 pm-9:35 am

1 stop26h 25m

$624

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 8/3

9:40 pm-7:55 am

1 stop29h 15m

Porto

Mon 8/25

7:20 pm-3:25 pm

1 stop25h 05m

$648

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 7/6

10:20 pm-3:30 pm

1 stop12h 10m

Porto

Wed 8/20

6:15 am-6:25 pm

1 stop17h 10m

$651

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Tue 8/12

3:30 pm-3:30 pm

2 stops19h 00m

Porto

Wed 8/27

6:15 am-6:25 pm

1 stop17h 10m

$656

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 8/3

10:00 pm-10:50 pm

1 stop19h 50m

Porto

Fri 8/22

6:15 am-5:40 pm

1 stop16h 25m

$657

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/23

Showing 1-10 of 30 results
1
2
3

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

What is the cheapest time of day to fly from ME to OPO?

Find hourly flight availability from Maine to Porto. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 24, 2025.

When flying from Maine to Porto, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Porto by month

Plan your trip to Porto by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Porto ranges from 0.7 - 7.7 inches per month. December is typically the wettest month, when rainfall can reach 7.7 in. July is typically the driest time to visit Porto when rainfall is around 0.7 in.

Temperature in Porto by month

Plan your trip to Porto by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Porto, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

Reviews of airlines servicing Porto

Get insights into the airlines that provide service to Porto. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Porto. Reviews last updated April 24, 2025.
Get a feel of what it's like to fly with Delta, KLM and Azores Airlines from Maine to Porto by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,920 reviews

Entertainment

7.9

Crew

8.5

Comfort

7.9

Overall

8.0

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,920 reviews
Delta
8.0
Very good
7,920 reviews

Entertainment

7.9

Crew

8.5

Comfort

7.9

Overall

8.0

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,333 reviews
Delta
8.0
Very good
7,920 reviews

Entertainment

7.9

Crew

8.5

Comfort

7.9

Overall

8.0

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Azores Airlines
7.6
Good
66 reviews
Delta
8.0
Very good
7,920 reviews

Entertainment

7.9

Crew

8.5

Comfort

7.9

Overall

8.0

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Austrian Airlines
7.6
Good
780 reviews
Delta
8.0
Very good
7,920 reviews

Entertainment

7.9

Crew

8.5

Comfort

7.9

Overall

8.0

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
SWISS
7.5
Good
1,582 reviews
Delta
8.0
Very good
7,920 reviews

Entertainment

7.9

Crew

8.5

Comfort

7.9

Overall

8.0

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

  • What are the cheapest airlines to fly from Maine to Porto one-way?

    One-way options have recently been found by users for as low as $322 on PLAY. Other airlines that offer cheap prices include Iberia from $346 and TAP AIR PORTUGAL from $398 one-way.

  • 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 $1,081). 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 Maine?

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

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
Boston to Lisbon flights
LaGuardia to Lisbon flights
Dulles Intl to Lisbon flights
Newark to Porto flights
O'Hare Intl to Lisbon flights
San Francisco to Lisbon flights
Miami to Lisbon flights
Los Angeles to Lisbon flights
Boston to Ponta Delgada flights
Reagan-National to Lisbon flights
John F Kennedy Intl to Porto flights
Philadelphia to Lisbon flights
Baltimore to Lisbon flights
Dallas/Fort Worth to Lisbon flights
Seattle to Lisbon flights
John F Kennedy Intl to Ponta Delgada flights
Boston to Porto flights
LaGuardia to Porto flights
Newark to Ponta Delgada flights
Hobby to Lisbon flights
Midway to Lisbon flights
Denver to Lisbon flights
Atlanta to Lisbon flights
Dulles Intl to Porto flights
Love Field to Lisbon flights
Reagan-National to Porto flights
George Bush Intcntl to Lisbon flights
Portland to Lisbon flights
Sky Harbor Intl to Lisbon flights
O'Hare Intl to Porto flights
Newark to Faro flights
Baltimore to Porto flights
Minneapolis to Lisbon flights
Orlando to Lisbon flights
John F Kennedy Intl to Faro flights
John F Kennedy Intl to Funchal flights
Charlotte to Lisbon flights
Seattle to Porto flights
Tampa to Lisbon flights
San Diego to Lisbon flights
Newark to Funchal flights
San Francisco to Porto flights
Raleigh to Lisbon flights
Dallas/Fort Worth to Porto flights
Detroit to Lisbon flights
Austin to Lisbon flights
St. Louis to Lisbon flights
Miami to Porto 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.