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$418+ 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 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — PHL
ago. 19 — ago. 261
mar. 8/19
mar. 8/26
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 agosto 14, 2025.

Round-trip from

$725
(Mytrip)

One-way from

$418
(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 agosto 14, 2025.

This Mytrip deal was found by Cheapflights users on 8/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/44:00 pmOPO - PHL
2 stops33h 55mMultiple Airlines
lun. 9/85:30 amPHL - OPO
3 stops23h 05mMultiple Airlines
Deal found 8/14$725
This United Airlines deal was found by Cheapflights users on 8/14. 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.
jue. 9/46:00 amOPO - PHL
1 stop15h 00mUnited Airlines
lun. 9/810:30 amPHL - OPO
2 stops15h 25mUnited Airlines
Deal found 8/14$730
This Air Canada deal was found by Cheapflights users on 8/14. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/46:00 amOPO - PHL
2 stops21h 08mAir Canada
lun. 9/810:35 amPHL - OPO
2 stops18h 00mAir Canada
Deal found 8/14$754
This Expedia deal was found by Cheapflights users on 8/14. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/96:00 amOPO - PHL
1 stop15h 00mMultiple Airlines
mié. 9/175:35 pmPHL - OPO
2 stops19h 55mMultiple Airlines
Deal found 8/14$755
This oojo deal was found by Cheapflights users on 8/13. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/911:00 pmOPO - PHL
2 stops39h 22mTAP AIR PORTUGAL
mié. 9/173:55 pmPHL - OPO
1 stop13h 50mTAP AIR PORTUGAL
Deal found 8/13$790
This Gotogate deal was found by Cheapflights users on 8/13. 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.
sáb. 10/182:35 pmOPO - PHL
2 stops30h 25mMultiple Airlines
dom. 11/23:30 pmPHL - OPO
2 stops16h 20mMultiple Airlines
Deal found 8/13$803
This American Airlines deal was found by Cheapflights users on 8/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/1812:20 pmOPO - PHL
2 stops24h 15mAmerican Airlines
dom. 11/28:00 pmPHL - OPO
1 stop19h 00mAmerican Airlines
Deal found 8/13$809
This Expedia deal was found by Cheapflights users on 8/13. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/98:40 amOPO - PHL
2 stops17h 51mSWISS
mié. 9/175:35 pmPHL - OPO
2 stops15h 10mSWISS
Deal found 8/13$821

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 agosto 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

jue. 9/4

4:00 pm-8:55 pm

2 stops33h 55m

Philadelphia

lun. 9/8

5:30 am-9:35 am

3 stops23h 05m

$725

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

jue. 9/4

6:00 am-4:00 pm

1 stop15h 00m

Philadelphia

lun. 9/8

3:25 pm-9:35 am

1 stop13h 10m

$730

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

jue. 9/4

6:00 am-10:08 pm

2 stops21h 08m

Philadelphia

lun. 9/8

10:35 am-9:35 am

2 stops18h 00m

$754

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

mar. 9/9

6:00 am-4:00 pm

1 stop15h 00m

Philadelphia

mié. 9/17

5:35 pm-6:30 pm

2 stops19h 55m

$755

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

jue. 9/4

6:00 am-4:00 pm

1 stop15h 00m

Philadelphia

lun. 9/8

5:35 pm-3:45 pm

1 stop17h 10m

$761

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

mar. 9/9

11:00 pm-9:22 am

2 stops39h 22m

Philadelphia

mié. 9/17

3:55 pm-10:45 am

1 stop13h 50m

$790

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

sáb. 10/18

2:35 pm-4:00 pm

2 stops30h 25m

Philadelphia

dom. 11/2

3:30 pm-12:50 pm

2 stops16h 20m

$803

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

sáb. 10/18

12:20 pm-7:35 am

2 stops24h 15m

Philadelphia

dom. 11/2

8:00 pm-8:00 pm

1 stop19h 00m

$809

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

mar. 10/14

6:20 am-11:47 pm

2 stops22h 27m

$418

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

mar. 10/14

6:00 am-4:00 pm

1 stop15h 00m

$652

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 11 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.

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

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