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$420+ 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 8/30. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — PHL
Jul 19 — Jul 261
Sat 7/19
Sat 7/26
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 July 14, 2025.

Round-trip from

$760
(American Airlines)

One-way from

$420
(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 July 14, 2025.

This American Airlines deal was found by Cheapflights users on 7/14. 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.
Thu 9/412:20 pmOPO - PHL
2 stops24h 23mAmerican Airlines
Mon 9/83:54 pmPHL - OPO
2 stops14h 46mAmerican Airlines
Deal found 7/14$760
This Gotogate deal was found by Cheapflights users on 7/13. 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.
Wed 8/276:00 amOPO - PHL
2 stops21h 07mMultiple Airlines
Wed 9/39:20 amPHL - OPO
2 stops21h 05mMultiple Airlines
Deal found 7/13$762
This United Airlines deal was found by Cheapflights users on 7/14. 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.
Thu 9/46:00 amOPO - PHL
1 stop15h 00mUnited Airlines
Mon 9/83:00 pmPHL - OPO
2 stops13h 45mUnited Airlines
Deal found 7/14$763
This Air Canada deal was found by Cheapflights users on 7/13. 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.
Wed 8/276:00 amOPO - PHL
2 stops21h 07mAir Canada
Wed 9/33:25 pmPHL - OPO
1 stop12h 55mAir Canada
Deal found 7/13$765

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 July 14, 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 9/4

12:20 pm-7:43 am

2 stops24h 23m

Philadelphia

Mon 9/8

3:54 pm-11:40 am

2 stops14h 46m

$760

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Wed 8/27

6:00 am-10:07 pm

2 stops21h 07m

Philadelphia

Wed 9/3

9:20 am-11:25 am

2 stops21h 05m

$762

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Thu 9/4

6:00 am-4:00 pm

1 stop15h 00m

Philadelphia

Mon 9/8

9:20 am-9:35 am

1 stop19h 15m

$763

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Wed 8/27

6:00 am-10:07 pm

2 stops21h 07m

Philadelphia

Wed 9/3

3:25 pm-9:20 am

1 stop12h 55m

$765

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Sat 8/30

12:20 pm-8:52 am

2 stops25h 32m

$420

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Fri 8/29

12:20 pm-3:50 pm

1 stop32h 30m

$535

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Mon 8/25

8:15 am-8:01 pm

2 stops16h 46m

$570

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Sun 8/31

9:25 pm-4:25 pm

1 stop24h 00m

$716

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/13

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.

Reviews of airlines servicing Philadelphia

Get insights into the airlines that provide service to Philadelphia. 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 Philadelphia. Reviews last updated July 14, 2025.
Read through reviews of airlines operating flights from Porto to Philadelphia, such as United Airlines, American Airlines, and Air Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,858 reviews

Crew

8.1

Comfort

7.3

Food

6.6

Overall

7.4

Boarding

7.7

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
United Airlines
7.4
Good
8,858 reviews
United Airlines
7.4
Good
8,858 reviews

Crew

8.1

Comfort

7.3

Food

6.6

Overall

7.4

Boarding

7.7

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,858 reviews

Crew

8.1

Comfort

7.3

Food

6.6

Overall

7.4

Boarding

7.7

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
Air Canada
7.1
Good
9,725 reviews
United Airlines
7.4
Good
8,858 reviews

Crew

8.1

Comfort

7.3

Food

6.6

Overall

7.4

Boarding

7.7

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
Iberia
7.0
Good
2,835 reviews
United Airlines
7.4
Good
8,858 reviews

Crew

8.1

Comfort

7.3

Food

6.6

Overall

7.4

Boarding

7.7

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
British Airways
6.6
Okay
7,134 reviews
United Airlines
7.4
Good
8,858 reviews

Crew

8.1

Comfort

7.3

Food

6.6

Overall

7.4

Boarding

7.7

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.

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.

  • What are the cheapest airlines flying from Porto to Philadelphia round-trip?

    American Airlines, at $760, was found to be the cheapest airline from Porto to Philadelphia.Alternate airlines to your destination round-trip include United Airlines and Air Canada.

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

    The cheapest airlines for a one-way flight from Porto to Philadelphia are Iberia ($535), American Airlines ($570), and British Airways ($716).

  • 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
Cherry Hill
Ocean City
Pottstown
Chester
Essington
Reading
Millville
Ephrata
Camden
Exton
Dover
Elkton
Willow Grove
Newark
Glen Mills
Springfield
Plymouth Meeting

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