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$427+ 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 3/14. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — PHL
Nov 26 — Dec 31
Wed 11/26
Wed 12/3
1 adult, Economy
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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 October 27, 2025.

This Mytrip deal was found by Cheapflights users on 10/27. 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 12/114:00 pmOPO - PHL
2 stops29h 00mMultiple Airlines
Thu 12/185:30 pmPHL - OPO
1 stop16h 20mMultiple Airlines
Deal found 10/27$764
This Cheapflightsfares deal was found by Cheapflights users on 10/25. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/238:20 amOPO - PHL
1 stop12h 15mIberia
Tue 12/307:50 pmPHL - OPO
1 stop19h 10mIberia
Deal found 10/25$789
This United Airlines deal was found by Cheapflights users on 10/25. 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 stops37h 07mUnited Airlines
Tue 12/305:40 pmPHL - OPO
1 stop13h 00mUnited Airlines
Deal found 10/25$796
This Expedia deal was found by Cheapflights users on 10/26. 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.
Mon 12/88:20 amOPO - PHL
2 stops16h 49mIberia
Mon 12/157:55 pmPHL - OPO
1 stop19h 05mIberia
Deal found 10/26$824
This United Airlines deal was found by Cheapflights users on 10/26. 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.
Mon 12/86:00 amOPO - PHL
2 stops35h 07mUnited Airlines
Mon 12/153:30 pmPHL - OPO
2 stops15h 10mUnited Airlines
Deal found 10/26$843
This Delta deal was found by Cheapflights users on 10/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/16:00 amOPO - PHL
2 stops21h 05mDelta
Sat 11/151:25 pmPHL - OPO
2 stops16h 05mDelta
Deal found 10/27$891
This Mytrip deal was found by Cheapflights users on 10/26. 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.
Mon 12/87:45 amOPO - PHL
2 stops20h 49mMultiple Airlines
Mon 12/1510:22 amPHL - OPO
3 stops25h 38mMultiple Airlines
Deal found 10/26$917
This United Airlines deal was found by Cheapflights users on 10/26. 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.
Mon 10/276:00 amOPO - PHL
2 stops32h 24mUnited Airlines
Mon 11/312:40 pmPHL - OPO
2 stops15h 50mUnited Airlines
Deal found 10/26$964
This Kiwi.com deal was found by Cheapflights users on 10/27. 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.
Sat 11/16:00 amOPO - PHL
1 stop15h 35mLufthansa
Sat 11/156:10 pmPHL - OPO
1 stop12h 30mLufthansa
Deal found 10/27$1,020
This Orbitz deal was found by Cheapflights users on 10/26. 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.
Mon 10/278:40 pmOPO - PHL
2 stops31h 36mMultiple Airlines
Mon 11/37:55 pmPHL - OPO
1 stop19h 05mMultiple Airlines
Deal found 10/26$1,032

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 October 27, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$764
(Mytrip)

One-way from

$427
(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
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One-way flight from Porto to Philadelphia
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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 October 27, 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 12/11

4:00 pm-4:00 pm

2 stops29h 00m

Philadelphia

Thu 12/18

5:30 pm-2:50 pm

1 stop16h 20m

$764

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Tue 12/23

8:20 am-3:35 pm

1 stop12h 15m

Philadelphia

Tue 12/30

7:50 pm-8:00 pm

1 stop19h 10m

$789

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Thu 2/19

6:00 am-9:38 pm

2 stops20h 38m

Philadelphia

Mon 2/23

12:55 pm-9:30 am

2 stops15h 35m

$789

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Tue 12/23

6:00 am-2:07 pm

2 stops37h 07m

Philadelphia

Tue 12/30

2:50 pm-11:40 am

2 stops15h 50m

$796

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Mon 12/8

8:20 am-8:09 pm

2 stops16h 49m

Philadelphia

Mon 12/15

7:55 pm-8:00 pm

1 stop19h 05m

$824

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Mon 12/8

6:00 am-12:07 pm

2 stops35h 07m

Philadelphia

Mon 12/15

3:30 pm-11:40 am

2 stops15h 10m

$843

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Mon 12/8

7:45 am-11:34 pm

2 stops20h 49m

Philadelphia

Mon 12/15

10:22 am-5:00 pm

3 stops25h 38m

$917

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Thu 2/19

12:25 pm-3:35 pm

1 stop32h 10m

Philadelphia

Mon 2/23

6:35 pm-4:00 pm

2 stops16h 25m

$952

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Sat 3/14

9:55 pm-12:46 pm

2 stops42h 51m

$427

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Wed 4/22

8:20 am-5:15 pm

1 stop13h 55m

$480

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/26

Showing 1-10 of 17 results
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Compare providers for flights from Porto to Philadelphia

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Porto to Philadelphia in October.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Porto-Philadelphia flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Porto-Philadelphia flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 $405). Flying from Porto to Philadelphia in August is currently the most expensive (average of $497). 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 United Airlines can get you from Porto to Philadelphia in just under 12h 15m. Your travel time can differ by up to 8h 23m. 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, October is the cheapest month in which you can book a flight from Porto to Philadelphia (average of $405). Flying from Porto to Philadelphia in August is currently the most expensive (average of $497). 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
King of Prussia
Pottstown
Reading
Ocean City
Cherry Hill
Dewey Beach
Ephrata
Camden
Vineland
Milford
Dover
Elkton
Essington
Willow Grove
Newark
Millville
Chester
Exton
Havre de Grace

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