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$724+ Cheap flights from Portland, ME (PWM) to Porto (OPO)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — OPO
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheap flight deals from Portland to Porto

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PWM) to Porto (OPO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 12, 2025.

Round-trip from

$724
(KLM)
From Portland to Porto
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Find flight deals from Portland to Porto

Cheapest flights from Portland to Porto
Explore the most affordable flight options available from Portland to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

This KLM deal was found by Cheapflights users on 6/10. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/152:35 pmPWM - OPO
2 stops19h 55mKLM
Thu 10/238:20 pmOPO - PWM
2 stops24h 50mKLM
Deal found 6/10$724
This United Airlines deal was found by Cheapflights users on 6/10. 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 10/155:36 pmPWM - OPO
1 stop11h 09mUnited Airlines
Thu 10/236:00 amOPO - PWM
2 stops17h 38mUnited Airlines
Deal found 6/10$740
This Air Canada deal was found by Cheapflights users on 6/12. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/153:50 pmPWM - OPO
2 stops36h 30mAir Canada
Tue 7/2212:50 pmOPO - PWM
2 stops39h 24mAir Canada
Deal found 6/12$925
This Delta deal was found by Cheapflights users on 6/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/1512:51 pmPWM - OPO
2 stops21h 39mDelta
Wed 7/239:20 amOPO - PWM
2 stops20h 37mDelta
Deal found 6/12$975
This Air Canada deal was found by Cheapflights users on 6/12. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/147:28 amPWM - OPO
3 stops21h 07mMultiple Airlines
Tue 7/2212:50 pmOPO - PWM
2 stops16h 09mMultiple Airlines
Deal found 6/12$1,249
This Austrian Airlines deal was found by Cheapflights users on 6/11. 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.
Sat 7/2610:51 amPWM - OPO
2 stops41h 44mAustrian Airlines
Sat 8/26:45 pmOPO - PWM
2 stops28h 41mAustrian Airlines
Deal found 6/11$2,122

Cheapflights Fare Finder

Customize your flight search to find flights from Portland 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 12, 2025.
Use the filters below to find and compare flights from Portland to Porto that are best for you.

Fly from

Portland

Fly to

Porto

Route

Depart

Return

Price

PortlandPorto

PWM - OPO

PWMOPO

Portland

Wed 10/15

2:35 pm-3:30 pm

2 stops19h 55m

Porto

Thu 10/23

8:20 pm-4:10 pm

2 stops24h 50m

$724

PortlandPorto

PWM - OPO

PWMOPO

Portland

Wed 10/15

5:36 pm-9:45 am

1 stop11h 09m

Porto

Thu 10/23

6:00 am-6:38 pm

2 stops17h 38m

$740

PortlandPorto

PWM - OPO

PWMOPO

Portland

Tue 7/15

3:50 pm-9:20 am

2 stops36h 30m

Porto

Tue 7/22

12:50 pm-11:14 pm

2 stops39h 24m

$925

PortlandPorto

PWM - OPO

PWMOPO

Portland

Tue 7/15

12:51 pm-3:30 pm

2 stops21h 39m

Porto

Wed 7/23

9:20 am-12:57 am

2 stops20h 37m

$975

PortlandPorto

PWM - OPO

PWMOPO

Portland

Mon 7/14

7:28 am-9:35 am

3 stops21h 07m

Porto

Tue 7/22

12:50 pm-11:59 pm

2 stops16h 09m

$1,249

PortlandPorto

PWM - OPO

PWMOPO

Portland

Sat 7/26

10:51 am-9:35 am

2 stops41h 44m

Porto

Sat 8/2

6:45 pm-6:26 pm

2 stops28h 41m

$2,122

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Best time to book a flight from Portland to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from Portland 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 Portland to Porto

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

Currently, January is the cheapest month in which you can book a flight from Portland, Maine to Porto (average of $523). Flying from Portland, Maine to Porto in June is currently the most expensive (average of $1,047). 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.

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 12, 2025.
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Crew

8.5

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
7,946 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Crew

8.5

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
1,358 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Crew

8.5

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
802 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Crew

8.5

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!
United Airlines
7.4
Good
8,790 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Crew

8.5

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!
Air Canada
7.1
Good
9,537 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Crew

8.5

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 Portland to Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Portland, Maine to Porto round-trip?

    According to our current data, KLM ($724), United Airlines ($740), and Air Canada ($925) offers the cheapest pricing from Portland, Maine to Porto.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Portland 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 Portland, Maine to Porto?

    Currently, January is the cheapest month in which you can book a flight from Portland, Maine to Porto (average of $523). Flying from Portland, Maine to Porto in June is currently the most expensive (average of $1,047). 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 Portland?

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

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