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$358+ 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 8/27. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — OPO
Jun 23 — Jun 301
Mon 6/23
Mon 6/30
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 June 18, 2025.

Round-trip from

$596
(Iberia)

One-way from

$358
(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 June 18, 2025.

This Iberia deal was found by Cheapflights users on 6/17. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/304:30 pmBOS - OPO
1 stop22h 25mIberia
Fri 9/58:15 amOPO - BOS
1 stop11h 45mIberia
Deal found 6/17$596
This Kiwi.com deal was found by Cheapflights users on 6/17. 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.
Sun 8/2410:55 pmBOS - OPO
Nonstop6h 40mMultiple Airlines
Mon 9/1510:30 amOPO - BOS
1 stop15h 45mMultiple Airlines
Deal found 6/17$599
This Booking.com deal was found by Cheapflights users on 6/17. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/165:50 amBOS - OPO
1 stop22h 30mAir Canada
Tue 7/226:00 amOPO - BOS
2 stops20h 56mAir Canada
Deal found 6/17$600
This Cheapflightsfares deal was found by Cheapflights users on 6/17. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2710:35 pmBOS - OPO
Nonstop6h 40mTAP AIR PORTUGAL
Sat 9/1311:00 amOPO - BOS
1 stop14h 05mTAP AIR PORTUGAL
Deal found 6/17$601
This British Airways deal was found by Cheapflights users on 6/17. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/287:45 pmBOS - OPO
1 stop19h 35mBritish Airways
Tue 9/98:40 pmOPO - BOS
1 stop28h 30mBritish Airways
Deal found 6/17$604
This United Airlines deal was found by Cheapflights users on 6/17. 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.
Tue 8/266:56 pmBOS - OPO
1 stop9h 49mUnited Airlines
Fri 9/196:00 amOPO - BOS
1 stop15h 00mUnited Airlines
Deal found 6/17$605
This Lufthansa deal was found by Cheapflights users on 6/17. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/28:05 pmBOS - OPO
1 stop22h 15mLufthansa
Sat 7/196:15 amOPO - BOS
1 stop16h 25mLufthansa
Deal found 6/17$617
This SWISS deal was found by Cheapflights users on 6/17. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/289:40 pmBOS - OPO
1 stop15h 50mSWISS
Sun 7/208:40 amOPO - BOS
1 stop16h 15mSWISS
Deal found 6/17$623
This Delta deal was found by Cheapflights users on 6/16. 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 8/278:15 pmBOS - OPO
1 stop14h 20mDelta
Mon 9/154:20 pmOPO - BOS
1 stop33h 00mDelta
Deal found 6/16$651
This American Airlines deal was found by Cheapflights users on 6/17. 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.
Sat 8/301:02 pmBOS - OPO
2 stops13h 33mAmerican Airlines
Sat 9/68:15 amOPO - BOS
2 stops15h 34mAmerican Airlines
Deal found 6/17$663
This Brussels Airlines deal was found by Cheapflights users on 6/16. 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 Brussels Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/278:05 pmBOS - OPO
2 stops35h 00mBrussels Airlines
Thu 9/1112:55 pmOPO - BOS
2 stops32h 05mBrussels Airlines
Deal found 6/16$704
This ITA Airways deal was found by Cheapflights users on 6/16. 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 ITA Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/145:05 pmBOS - OPO
2 stops21h 15mITA Airways
Mon 9/157:35 amOPO - BOS
2 stops35h 05mITA Airways
Deal found 6/16$734

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 June 18, 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

Sat 8/30

4:30 pm-7:55 pm

1 stop22h 25m

Porto

Fri 9/5

8:15 am-3:00 pm

1 stop11h 45m

$596

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 8/24

10:55 pm-10:35 am

Nonstop6h 40m

Porto

Mon 9/15

10:30 am-9:15 pm

1 stop15h 45m

$599

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 7/16

5:50 am-9:20 am

1 stop22h 30m

Porto

Tue 7/22

6:00 am-9:56 pm

2 stops20h 56m

$600

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 8/27

10:35 pm-10:15 am

Nonstop6h 40m

Porto

Sat 9/13

11:00 am-8:05 pm

1 stop14h 05m

$601

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Thu 8/28

7:45 pm-8:20 pm

1 stop19h 35m

Porto

Thu 9/4

9:55 am-10:45 pm

1 stop17h 50m

$604

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Tue 8/26

4:20 pm-7:45 am

1 stop10h 25m

Porto

Thu 9/11

6:00 am-8:10 pm

1 stop19h 10m

$605

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Thu 8/21

12:54 pm-7:35 am

2 stops13h 41m

Porto

Sun 8/31

8:15 am-3:00 pm

1 stop11h 45m

$608

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 7/2

8:05 pm-11:20 pm

1 stop22h 15m

Porto

Sat 7/19

6:15 am-5:40 pm

1 stop16h 25m

$617

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sat 6/28

9:40 pm-6:30 pm

1 stop15h 50m

Porto

Sun 7/20

8:40 am-7:55 pm

1 stop16h 15m

$623

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 8/27

8:15 pm-3:35 pm

1 stop14h 20m

Porto

Mon 9/15

4:20 pm-8:20 pm

1 stop33h 00m

$651

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/16

Showing 1-10 of 31 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

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 June 18, 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 June 18, 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
7,964 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,964 reviews
Delta
8.0
Very good
7,964 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,364 reviews
Delta
8.0
Very good
7,964 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Azores Airlines
7.6
Good
66 reviews
Delta
8.0
Very good
7,964 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Austrian Airlines
7.6
Good
804 reviews
Delta
8.0
Very good
7,964 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
SWISS
7.5
Good
1,632 reviews
Delta
8.0
Very good
7,964 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 $378 on TAP AIR PORTUGAL. Other airlines that offer cheap prices include PLAY from $380 and United Airlines from $429 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 $1,040). 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

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