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$410+ 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 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — PHL
Mar 7 — Mar 141
Sat 3/7
Sat 3/14
1 adult, Economy
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Cheap 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 February 5, 2026.

This Kiwi.com deal was found by Cheapflights users on 2/4. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/87:55 am
OPO
-
PHL
1 stop13h 05m
Multiple Airlines
Sun 3/156:30 pm
PHL
-
OPO
1 stop13h 05m
Multiple Airlines
Deal found 2/4$774
This United Airlines deal was found by Cheapflights users on 2/4. 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.
Sun 3/86:00 am
OPO
-
PHL
1 stop15h 05m
United Airlines
Sun 3/152:52 pm
PHL
-
OPO
2 stops14h 38m
United Airlines
Deal found 2/4$795
This Expedia deal was found by Cheapflights users on 2/5. 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.
Sun 3/226:00 am
OPO
-
PHL
1 stop15h 05m
Multiple Airlines
Sun 3/292:55 pm
PHL
-
OPO
2 stops20h 05m
Multiple Airlines
Deal found 2/5$807
This United Airlines deal was found by Cheapflights users on 2/2. 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 9/96:00 am
OPO
-
PHL
1 stop15h 05m
United Airlines
Sun 9/132:37 pm
PHL
-
OPO
2 stops14h 08m
United Airlines
Deal found 2/2$814

Find 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 February 5, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$774
(Kiwi.com)

One-way from

$410
(Kiwi.com)
Provider with most accurate pricing for Porto-Philadelphia flight deals.
Search Deals
Provider most trusted by Cheapflights users for Porto-Philadelphia flights.
Search Deals
From Porto to Philadelphia
Search Deals
One-way flight from Porto to Philadelphia
Search Deals

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 February 5, 2026.
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

Sun 3/8

7:55 am-5:00 pm

1 stop13h 05m

Philadelphia

Sun 3/15

6:30 pm-11:35 am

1 stop13h 05m

$774

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Sun 3/8

6:00 am-4:05 pm

1 stop15h 05m

Philadelphia

Sun 3/15

2:52 pm-9:30 am

2 stops14h 38m

$795

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Sun 3/22

6:00 am-5:05 pm

1 stop15h 05m

Philadelphia

Sun 3/29

2:55 pm-4:00 pm

2 stops20h 05m

$807

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Wed 3/25

12:30 pm-5:14 pm

2 stops32h 44m

Philadelphia

Wed 4/1

10:00 am-3:40 pm

2 stops24h 40m

$854

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Mon 5/4

9:15 am-4:10 pm

3 stops35h 55m

$410

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Wed 5/13

7:00 am-7:41 am

2 stops29h 41m

$424

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Tue 5/12

5:45 pm-6:55 pm

3 stops30h 10m

$447

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Tue 2/17

2:10 pm-2:05 pm

2 stops28h 55m

$460

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Sun 3/1

6:30 am-11:50 pm

3 stops46h 20m

$469

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Fri 2/13

6:00 am-4:26 pm

3 stops39h 26m

$481

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/4

Showing 1-10 of 11 results
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  • Most accurate provider: When it comes to deals on Porto-Philadelphia flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Porto-Philadelphia flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Porto-Philadelphia flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Porto-Philadelphia flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Porto-Philadelphia flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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, October is the cheapest month in which you can book a flight from Porto to Philadelphia (average of $382). Flying from Porto to Philadelphia in December is currently the most expensive (average of $513). 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?

    United Airlines can get you from Porto to Philadelphia in just under 15h 05m. Your travel time can differ by up to . The distance from Porto to Philadelphia is about 3403 mi.

  • 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, October is the cheapest month in which you can book a flight from Porto to Philadelphia (average of $382). Flying from Porto to Philadelphia in December is currently the most expensive (average of $513). 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
Wildwood
Pottstown
Reading
Ocean City
King of Prussia
Cherry Hill
Lewes
Dewey Beach
Ephrata
Camden
Vineland
Milford
Dover
Elkton
Essington
Willow Grove
New Castle
Millville
Glen Mills
Newark

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