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$332+ Cheap flights from Porto (OPO) to Philadelphia (PHL)

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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — PHL
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheap flight deals from Porto to Philadelphia

Discover tips and strategies to find the most affordable flight options for your journey from Porto (OPO) to Philadelphia (PHL). 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 September 17, 2025.

Round-trip from

$633
(Mytrip)

One-way from

$328
(Kiwi.com)
From Porto to Philadelphia
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One-way flight from Porto to Philadelphia
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Find flight deals from Porto to Philadelphia

Cheapest flights from Porto to Philadelphia
Explore the most affordable flight options available from Porto to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

This Mytrip deal was found by Cheapflights users on 9/15. 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.
Thu 10/308:00 pmOPO - PHL
2 stops25h 00mMultiple Airlines
Thu 11/65:30 pmPHL - OPO
1 stop16h 20mMultiple Airlines
Deal found 9/15$633
This American Airlines deal was found by Cheapflights users on 9/17. 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.
Tue 12/238:20 amOPO - PHL
1 stop12h 15mAmerican Airlines
Sat 1/37:50 pmPHL - OPO
1 stop10h 55mAmerican Airlines
Deal found 9/17$710
This Iberia deal was found by Cheapflights users on 9/15. 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.
Thu 10/308:40 pmOPO - PHL
1 stop24h 00mIberia
Thu 11/67:55 pmPHL - OPO
1 stop15h 05mIberia
Deal found 9/15$743
This Iberia deal was found by Cheapflights users on 9/17. 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.
Fri 10/1710:00 pmOPO - PHL
1 stop23h 50mIberia
Fri 10/248:35 pmPHL - OPO
1 stop14h 20mIberia
Deal found 9/17$764
This United Airlines deal was found by Cheapflights users on 9/17. 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 12/236:00 amOPO - PHL
2 stops23h 45mUnited Airlines
Sat 1/36:34 pmPHL - OPO
2 stops39h 41mUnited Airlines
Deal found 9/17$803
This Mytrip deal was found by Cheapflights users on 9/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/116:00 amOPO - PHL
2 stops31h 52mMultiple Airlines
Sun 10/124:03 pmPHL - OPO
3 stops25h 32mMultiple Airlines
Deal found 9/16$820
This Orbitz deal was found by Cheapflights users on 9/17. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/176:15 amOPO - PHL
2 stops14h 45mLufthansa
Fri 10/245:35 pmPHL - OPO
1 stop17h 10mLufthansa
Deal found 9/17$886
This Travelocity deal was found by Cheapflights users on 9/17. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/176:15 amOPO - PHL
2 stops14h 45mMultiple Airlines
Fri 10/244:50 pmPHL - OPO
2 stops20h 40mMultiple Airlines
Deal found 9/17$911

Cheapflights Fare Finder

 
Customize your flight search to find flights from Porto to Philadelphia 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 September 17, 2025.
Use the filters below to find and compare flights from Porto to Philadelphia that are best for you.

Fly from

Porto

Fly to

Philadelphia

Route

Depart

Return

Price

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Thu 10/30

8:00 pm-5:00 pm

2 stops25h 00m

Philadelphia

Thu 11/6

5:30 pm-2:50 pm

1 stop16h 20m

$633

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Thu 2/19

9:55 pm-3:20 pm

1 stop22h 25m

Philadelphia

Mon 2/23

7:45 pm-11:45 am

2 stops35h 00m

$707

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Tue 12/23

8:20 am-3:35 pm

1 stop12h 15m

Philadelphia

Sat 1/3

7:50 pm-11:45 am

1 stop10h 55m

$710

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Thu 10/30

8:40 pm-4:40 pm

1 stop24h 00m

Philadelphia

Thu 11/6

7:55 pm-4:00 pm

1 stop15h 05m

$743

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Wed 10/15

10:00 pm-6:49 pm

3 stops49h 49m

$332

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Thu 10/23

7:15 am-6:49 pm

3 stops40h 34m

$337

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Tue 10/21

11:50 am-10:11 am

3 stops51h 21m

$389

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Wed 10/22

1:20 pm-10:11 am

2 stops25h 51m

$429

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Tue 9/23

9:00 pm-1:02 pm

3 stops45h 02m

$464

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Fri 10/24

10:35 pm-10:30 pm

2 stops28h 55m

$478

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

Showing 1-10 of 12 results
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Best time to book a flight from Porto to Philadelphia

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

What is the cheapest month to book a flight from Porto to Philadelphia?

Currently, August is the cheapest month in which you can book a flight from Porto to Philadelphia (average of $236). Flying from Porto to Philadelphia in March is currently the most expensive (average of $295). 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.

Related info for your journey

Find useful and relevant information for your journey from Porto to Philadelphia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Porto to Philadelphia?

    Iberia and American Airlines can get you from Porto to Philadelphia in just under 12h 15m. Your travel time can differ by up to 10h 10m. The distance from Porto to Philadelphia is about 3403 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Porto to Philadelphia 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 Porto to Philadelphia?

    Currently, August is the cheapest month in which you can book a flight from Porto to Philadelphia (average of $236). Flying from Porto to Philadelphia in March is currently the most expensive (average of $295). 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 Philadelphia?

Book flights to Philadelphia if you plan to visit one of these locations
Vineland
Wildwood
King of Prussia
Pottstown
Reading
Dewey Beach
Ephrata
Camden
Ocean City
Cherry Hill
Dover
Elkton
Essington
Willow Grove
Newark
Millville
Chester
Exton
Havre de Grace
Plymouth Meeting

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