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$266+ Cheap flights from Philadelphia (PHL) to Porto (OPO)

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 1/19. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — OPO
Jan 22 — Jan 291
Thu 1/22
Thu 1/29
1 adult, Economy
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Find cheap flights from Philadelphia to Porto with Cheapflights

1. Tell us where you want to go

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Cheapflights Tip: The best prices from Philadelphia to Porto are usually found in November or March, booked 34 days in advance, depart on a Sunday or Saturday and return on a Monday

Cheap flight deals from Philadelphia to Porto

Cheapest flights from Philadelphia to Porto
Explore the most affordable flight options available from Philadelphia to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 23, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 12/23. 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.
Sat 12/277:50 pmPHL - OPO
1 stop19h 10mIberia
Sun 1/48:40 pmOPO - PHL
2 stops22h 10mIberia
Deal found 12/23$1,568
This Ovago deal was found by Cheapflights users on 12/22. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/277:50 pmPHL - OPO
1 stop10h 55mMultiple Airlines
Sun 1/44:40 pmOPO - PHL
1 stop27h 55mMultiple Airlines
Deal found 12/22$1,595
This oojo deal was found by Cheapflights users on 12/22. 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.
Mon 12/297:50 pmPHL - OPO
1 stop19h 10mIberia
Mon 1/58:40 pmOPO - PHL
2 stops46h 25mIberia
Deal found 12/22$3,096
This KAYAK deal was found by Cheapflights users on 12/22. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/307:50 pmPHL - OPO
1 stop19h 10mMultiple Airlines
Tue 1/66:25 pmOPO - PHL
1 stop24h 05mMultiple Airlines
Deal found 12/22$3,138

Find flight deals from Philadelphia to Porto

Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) to Porto (OPO). 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 December 23, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$470
(Mytrip)

One-way from

$266
(Kiwi.com)

Popular in

December

Cheapest in

November

Average price

$1,244
Provider with most accurate pricing for Philadelphia-Porto flight deals.
Search Deals
Provider most trusted by Cheapflights users for Philadelphia-Porto flights.
Search Deals
From Philadelphia to Porto
Search Deals
One-way flight from Philadelphia to Porto
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($30 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($40 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Philadelphia to Porto 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 December 23, 2025.
Use the filters below to find and compare flights from Philadelphia to Porto that are best for you.

Fly from

Philadelphia

Fly to

Porto

Route

Depart

Return

Price

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 1/19

1:10 pm-11:15 am

3 stops41h 05m

Porto

Mon 1/26

12:05 pm-9:36 pm

2 stops38h 31m

$504

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 3/9

4:35 pm-11:40 am

2 stops15h 05m

Porto

Mon 3/30

4:35 pm-4:00 pm

1 stop28h 25m

$509

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 3/9

7:50 am-11:40 am

2 stops23h 50m

Porto

Mon 3/30

7:20 pm-4:00 pm

2 stops25h 40m

$518

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Thu 1/8

5:40 pm-11:40 am

1 stop13h 00m

Porto

Thu 1/22

6:00 am-4:05 pm

1 stop15h 05m

$525

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Wed 4/22

10:33 am-9:45 am

2 stops18h 12m

Porto

Fri 5/8

6:00 am-4:00 pm

1 stop15h 00m

$546

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Fri 2/6

12:29 pm-10:30 am

2 stops17h 01m

Porto

Fri 2/13

11:15 am-12:26 am

2 stops18h 11m

$549

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Thu 2/5

6:30 am-2:45 pm

2 stops27h 15m

Porto

Thu 2/12

6:00 am-10:46 pm

2 stops21h 46m

$553

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 1/19

9:02 am-8:10 am

3 stops42h 08m

$266

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Sun 5/10

1:24 pm-3:25 pm

2 stops21h 01m

$326

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Wed 5/13

8:30 pm-8:00 pm

1 stop18h 30m

$331

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/21

Showing 1-10 of 15 results
1
2

Compare providers for flights from Philadelphia to Porto

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 Philadelphia to Porto in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 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 Philadelphia-Porto flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Philadelphia-Porto flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Philadelphia-Porto flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Philadelphia-Porto 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 Philadelphia-Porto 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 Philadelphia to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from Philadelphia 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 Philadelphia to Porto

How far ahead should I book a flight from Philadelphia to Porto?

Use this chart to determine the optimal time to book a round-trip flight from Philadelphia to Porto. Price data was last updated on December 19, 2025.

Booking 30 days in advance of your planned departure date is, on average, the best time to get cheap flights from Philadelphia to Porto. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Philadelphia to Porto?

Currently, October is the cheapest month in which you can book a flight from Philadelphia to Porto (average of $383). Flying from Philadelphia to Porto in June is currently the most expensive (average of $589). 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.

What is the cheapest time of day to fly from PHL to OPO?

Find hourly flight availability from Philadelphia to Porto. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 23, 2025.

One of the essential ways to save on airfare from Philadelphia to Porto is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 12% on airfare.

Reviews of airlines servicing Porto

Get insights into the airlines that provide service to Porto. 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 Porto. Reviews last updated December 23, 2025.
See what other customers who have flown with United Airlines, American Airlines, and Iberia from Philadelphia to Porto have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,109 reviews

Boarding

7.7

Entertainment

7.1

Crew

8.1

Food

6.6

Overall

7.4

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
United Airlines
7.4
Good
9,109 reviews
United Airlines
7.4
Good
9,109 reviews

Boarding

7.7

Entertainment

7.1

Crew

8.1

Food

6.6

Overall

7.4

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
American Airlines
7.2
Good
11,050 reviews
United Airlines
7.4
Good
9,109 reviews

Boarding

7.7

Entertainment

7.1

Crew

8.1

Food

6.6

Overall

7.4

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
Iberia
7.0
Good
3,056 reviews
United Airlines
7.4
Good
9,109 reviews

Boarding

7.7

Entertainment

7.1

Crew

8.1

Food

6.6

Overall

7.4

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
Lufthansa
6.8
Okay
7,650 reviews
United Airlines
7.4
Good
9,109 reviews

Boarding

7.7

Entertainment

7.1

Crew

8.1

Food

6.6

Overall

7.4

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.

Related info for your journey

Find useful and relevant information for your journey from Philadelphia to Porto. 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 Philadelphia to Porto?

    A quick flight from Philadelphia to Porto can take about 15h 05m. SWISS provides one of the quickest options available for as low as $509. Philadelphia and Porto are separated by a distance of 3403 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    According to our current data, United Airlines ($489), American Airlines ($567), and Lufthansa ($576) offers the cheapest pricing from Philadelphia to Porto. United Airlines is currently priced 40% below the average price you’ll pay for this route.

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

    $428 is the cheapest one-way deal found within the past few days, from Iberia. You may also be able to find cheap deals on TAP AIR PORTUGAL and Lufthansa, with prices starting from $437 and $456, respectively.

  • Can I find deals for flights from Philadelphia to Porto that include hotel bookings?

    Yes. In addition to deals on Philadelphia to Porto flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Philadelphia to Porto?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to Porto.

  • Can I find deals for business class flights from Philadelphia to Porto?

    Yes. Cheapflights offers flight deals from Philadelphia to Porto 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 Philadelphia to Porto?

    Currently, October is the cheapest month in which you can book a flight from Philadelphia to Porto (average of $383). Flying from Philadelphia to Porto in June is currently the most expensive (average of $589). 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
Aveiro
Arcos de Valdevez
Coimbra
Vila Nova de Gaia

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Top 4 airlines flying from Philadelphia to Porto

Discover the top 4 airlines that operate flights from Philadelphia to Porto. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$489Average$814FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$567Average$830FlexibilityNo cancel feeOn-time71%
LufthansaCheapest$576Average$870FlexibilityNo cancel feeOn-time76%
IberiaCheapest$593Average$857FlexibilityNo cancel feeOn-time77%

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