HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Philadelphia

$524+ 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 8/27. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — PHL
May 6 — May 131
Tue 5/6
Tue 5/13
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Porto to Philadelphia with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 May 1, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$776
(United Airlines)

One-way from

$524
(Mytrip)
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

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 May 1, 2025.

This United Airlines deal was found by Cheapflights users on 4/30. 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.
Fri 5/236:00 amOPO - PHL
1 stop15h 00mUnited Airlines
Fri 6/136:35 pmPHL - OPO
2 stops34h 00mUnited Airlines
Deal found 4/30$776
This FlightHub deal was found by Cheapflights users on 4/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/136:00 amOPO - PHL
2 stops37h 36mMultiple Airlines
Thu 5/225:35 pmPHL - OPO
2 stops19h 55mMultiple Airlines
Deal found 4/30$842
This Lufthansa deal was found by Cheapflights users on 4/30. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/236:00 amOPO - PHL
1 stop15h 00mLufthansa
Fri 6/135:35 pmPHL - OPO
1 stop12h 40mLufthansa
Deal found 4/30$924

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 May 1, 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

Fri 5/23

6:00 am-4:00 pm

1 stop15h 00m

Philadelphia

Fri 6/13

6:35 pm-9:35 am

2 stops34h 00m

$776

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Tue 5/13

6:00 am-2:36 pm

2 stops37h 36m

Philadelphia

Thu 5/22

5:35 pm-6:30 pm

2 stops19h 55m

$842

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Fri 5/23

6:00 am-4:00 pm

1 stop15h 00m

Philadelphia

Fri 6/13

5:35 pm-11:15 am

1 stop12h 40m

$924

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Wed 8/27

7:00 am-10:42 pm

3 stops20h 42m

$524

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Mon 8/25

8:15 am-3:50 pm

1 stop12h 35m

$660

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Wed 8/27

6:15 am-5:14 pm

2 stops15h 59m

$761

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Wed 5/14

6:15 am-10:06 pm

2 stops44h 51m

$904

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Wed 5/14

6:00 am-4:00 pm

1 stop15h 00m

$927

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

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 May.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*2 stars
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 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 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, 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.

Rainfall in Philadelphia by month

Plan your trip to Philadelphia by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Philadelphia ranges from 2.7 - 4.4 inches per month. July is typically the wettest month, when rainfall can reach 4.4 in. February is typically the driest time to visit Philadelphia when rainfall is around 2.7 in.

Temperature in Philadelphia by month

Plan your trip to Philadelphia by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Philadelphia, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 33.8 F).

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 May 1, 2025.
KLM
7.8
Good
1,334 reviews

Food

7.2

Boarding

7.8

Crew

8.4

Entertainment

7.1

Comfort

7.7

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
KLM
7.8
Good
1,334 reviews
KLM
7.8
Good
1,334 reviews

Food

7.2

Boarding

7.8

Crew

8.4

Entertainment

7.1

Comfort

7.7

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
United Airlines
7.4
Good
8,696 reviews
KLM
7.8
Good
1,334 reviews

Food

7.2

Boarding

7.8

Crew

8.4

Entertainment

7.1

Comfort

7.7

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
American Airlines
7.2
Good
10,000 reviews
KLM
7.8
Good
1,334 reviews

Food

7.2

Boarding

7.8

Crew

8.4

Entertainment

7.1

Comfort

7.7

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
Air Canada
7.0
Good
9,252 reviews
KLM
7.8
Good
1,334 reviews

Food

7.2

Boarding

7.8

Crew

8.4

Entertainment

7.1

Comfort

7.7

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
Lufthansa
6.7
Okay
7,045 reviews
KLM
7.8
Good
1,334 reviews

Food

7.2

Boarding

7.8

Crew

8.4

Entertainment

7.1

Comfort

7.7

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.

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?

    United Airlines, at $776, was found to be the cheapest airline from Porto to Philadelphia. An alternate airline flying to your destination would be Lufthansa.

  • 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 American Airlines ($660), KLM ($761), and Air Canada ($904).

  • 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 Porto?

Book flights to Porto if you plan to visit one of these locations
Vineland
Pottstown
Wildwood
King of Prussia
Reading
Cherry Hill
Exton
Ocean City
Essington
Chester
Middletown
Willow Grove
Newark
Millville
Ephrata
Camden
Dewey Beach
West Chester
Malvern
Dover

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.