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$360+ Cheap flights from Portland, ME (PWM) 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 9/8. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — OPO
ago. 4 — ago. 111
lun. 8/4
lun. 8/11
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 julio 30, 2025.

Round-trip from

$981
(oojo)

One-way from

$360
(Kiwi.com)
From Portland to Porto
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One-way flight 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 julio 30, 2025.

This United Airlines deal was found by Cheapflights users on 7/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/116:00 amPWM - OPO
3 stops24h 40mUnited Airlines
lun. 12/2212:30 pmOPO - PWM
2 stops40h 29mUnited Airlines
Deal found 7/28$725
This Air Canada deal was found by Cheapflights users on 7/28. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/1110:35 amPWM - OPO
3 stops21h 40mAir Canada
lun. 12/228:30 amOPO - PWM
3 stops20h 01mAir Canada
Deal found 7/28$946
This oojo deal was found by Cheapflights users on 7/29. 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.
vie. 9/122:17 pmPWM - OPO
2 stops38h 28mTurkish Airlines
vie. 9/194:50 pmOPO - PWM
2 stops58h 17mTurkish Airlines
Deal found 7/29$981
This Air Canada deal was found by Cheapflights users on 7/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/127:26 pmPWM - OPO
2 stops33h 09mMultiple Airlines
vie. 9/1910:00 amOPO - PWM
3 stops18h 03mMultiple Airlines
Deal found 7/29$2,105

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 julio 30, 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

vie. 9/12

2:17 pm-9:45 am

2 stops38h 28m

Porto

vie. 9/19

4:50 pm-10:07 pm

2 stops58h 17m

$981

PortlandPorto

PWM - OPO

PWMOPO

Portland

vie. 9/12

3:11 pm-6:50 am

1 stop10h 39m

Porto

vie. 9/19

6:00 am-7:29 pm

2 stops18h 29m

$1,425

PortlandPorto

PWM - OPO

PWMOPO

Portland

vie. 9/12

7:30 am-11:25 am

3 stops22h 55m

Porto

vie. 9/19

10:00 am-11:03 pm

3 stops18h 03m

$1,793

PortlandPorto

PWM - OPO

PWMOPO

Portland

vie. 9/12

7:26 pm-9:35 am

2 stops33h 09m

Porto

vie. 9/19

10:00 am-11:03 pm

3 stops18h 03m

$2,105

PortlandPorto

PWM - OPO

PWMOPO

Portland

lun. 9/8

9:46 am-9:00 am

2 stops42h 14m

$360

PortlandPorto

PWM - OPO

PWMOPO

Portland

mar. 9/9

2:17 pm-10:10 am

2 stops38h 53m

$499

PortlandPorto

PWM - OPO

PWMOPO

Portland

dom. 9/7

3:11 pm-6:55 am

1 stop10h 44m

$833

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

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 $1,033). 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.

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 julio 30, 2025.
Get a feel of what it's like to fly with United Airlines, Turkish Airlines, and Air Canada from Portland 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.
United Airlines
7.4
Good
8,896 reviews

Comfort

7.3

Overall

7.4

Food

6.6

Entertainment

7.1

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,896 reviews
United Airlines
7.4
Good
8,896 reviews

Comfort

7.3

Overall

7.4

Food

6.6

Entertainment

7.1

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Turkish Airlines
7.3
Good
3,928 reviews
United Airlines
7.4
Good
8,896 reviews

Comfort

7.3

Overall

7.4

Food

6.6

Entertainment

7.1

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Air Canada
7.1
Good
9,837 reviews
United Airlines
7.4
Good
8,896 reviews

Comfort

7.3

Overall

7.4

Food

6.6

Entertainment

7.1

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
TAP AIR PORTUGAL
7.1
Good
1,930 reviews
United Airlines
7.4
Good
8,896 reviews

Comfort

7.3

Overall

7.4

Food

6.6

Entertainment

7.1

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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.

  • 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 $1,033). 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 Porto?

Book flights to Porto if you plan to visit one of these locations
Aveiro
Coimbra

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