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$348+ 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 4/22. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — OPO
dic. 13 — dic. 201
sáb. 12/13
sáb. 12/20
1 adult, Economy
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Find 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 noviembre 13, 2025.

This CrystalTravel deal was found by Cheapflights users on 11/12. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/25:40 pmPHL - OPO
1 stop13h 00mLufthansa
mar. 12/96:00 amOPO - PHL
1 stop15h 05mLufthansa
Deal found 11/12$465
This United deal was found by Cheapflights users on 11/11. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/246:00 amPHL - OPO
2 stops22h 30mMultiple Airlines
mar. 12/96:00 amOPO - PHL
1 stop15h 05mMultiple Airlines
Deal found 11/11$469
This Flysmarter deal was found by Cheapflights users on 11/11. 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 Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/245:33 pmPHL - OPO
2 stops16h 52mKLM
mar. 12/96:05 amOPO - PHL
2 stops15h 51mKLM
Deal found 11/11$478
This United deal was found by Cheapflights users on 11/12. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/25:40 pmPHL - OPO
1 stop16h 05mMultiple Airlines
mar. 12/96:00 amOPO - PHL
1 stop15h 05mMultiple Airlines
Deal found 11/12$488
This Delta deal was found by Cheapflights users on 11/12. 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.
mar. 12/210:32 amPHL - OPO
2 stops18h 58mDelta
mar. 12/96:05 amOPO - PHL
2 stops22h 05mDelta
Deal found 11/12$491
This United Airlines deal was found by Cheapflights users on 11/11. 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.
mié. 11/2612:40 pmPHL - OPO
2 stops15h 50mUnited Airlines
lun. 12/112:30 pmOPO - PHL
1 stop32h 35mUnited Airlines
Deal found 11/11$497
This Expedia deal was found by Cheapflights users on 11/13. 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. 12/23:30 pmPHL - OPO
2 stops18h 15mMultiple Airlines
lun. 12/87:20 pmOPO - PHL
2 stops32h 26mMultiple Airlines
Deal found 11/13$498
This American Airlines deal was found by Cheapflights users on 11/11. 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.
lun. 11/247:55 pmPHL - OPO
1 stop10h 50mAmerican Airlines
mar. 12/912:25 pmOPO - PHL
1 stop32h 05mAmerican Airlines
Deal found 11/11$505
This Mytrip deal was found by Cheapflights users on 11/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/25:40 pmPHL - OPO
1 stop16h 05mLufthansa
lun. 12/84:15 pmOPO - PHL
1 stop28h 50mLufthansa
Deal found 11/13$506
This United Airlines deal was found by Cheapflights users on 11/12. 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.
mar. 12/25:40 pmPHL - OPO
1 stop13h 00mUnited Airlines
lun. 12/812:30 pmOPO - PHL
1 stop32h 35mUnited Airlines
Deal found 11/12$507

Cheap 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 noviembre 13, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$465
(CrystalTravel)

Popular in

May

Cheapest in

November

Average price

$666
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
Highest demand for flights based on searches. 7% potential increase in price ($63 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 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 noviembre 13, 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

lun. 11/24

6:00 am-9:30 am

2 stops22h 30m

Porto

mar. 12/9

6:00 am-4:05 pm

1 stop15h 05m

$469

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

mar. 12/2

3:30 pm-11:40 am

2 stops15h 10m

Porto

mar. 12/9

6:00 am-4:05 pm

1 stop15h 05m

$488

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

mar. 12/2

5:40 pm-2:45 pm

1 stop16h 05m

Porto

mar. 12/9

6:00 am-4:05 pm

1 stop15h 05m

$488

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

mar. 12/2

10:32 am-10:30 am

2 stops18h 58m

Porto

mar. 12/9

6:05 am-11:10 pm

2 stops22h 05m

$491

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

mié. 11/26

12:40 pm-9:30 am

2 stops15h 50m

Porto

lun. 12/1

12:30 pm-4:05 pm

1 stop32h 35m

$497

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

lun. 11/24

7:55 pm-11:45 am

1 stop10h 50m

Porto

mar. 12/9

12:25 pm-3:30 pm

1 stop32h 05m

$505

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

mar. 12/2

5:40 pm-11:40 am

1 stop13h 00m

Porto

lun. 12/8

12:30 pm-4:05 pm

1 stop32h 35m

$507

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

lun. 12/8

8:00 am-10:30 am

2 stops21h 30m

Porto

lun. 12/15

11:25 am-12:43 pm

2 stops54h 18m

$510

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

lun. 3/9

4:56 pm-6:35 pm

2 stops21h 39m

Porto

lun. 3/30

4:35 pm-4:00 pm

1 stop28h 25m

$523

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

lun. 5/4

5:35 pm-11:10 am

1 stop12h 35m

Porto

mar. 5/12

6:00 am-4:00 pm

1 stop15h 00m

$525

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/12

Showing 1-10 of 19 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 November.
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

*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

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 July is currently the most expensive (average of $634). 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 noviembre 13, 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 noviembre 13, 2025.
See what other customers who have flown with United Airlines, American Airlines, and Air Canada 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
9,017 reviews

Food

6.6

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
9,017 reviews
United Airlines
7.4
Good
9,017 reviews

Food

6.6

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
American Airlines
7.2
Good
11,051 reviews
United Airlines
7.4
Good
9,017 reviews

Food

6.6

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Air Canada
7.1
Good
10,448 reviews
United Airlines
7.4
Good
9,017 reviews

Food

6.6

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Iberia
7.0
Good
3,012 reviews
United Airlines
7.4
Good
9,017 reviews

Food

6.6

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Lufthansa
6.8
Okay
7,572 reviews
United Airlines
7.4
Good
9,017 reviews

Food

6.6

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

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 10m. United Airlines provides one of the quickest options available for as low as $488. 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 ($563), American Airlines ($567), and Iberia ($593) offers the cheapest pricing from Philadelphia to Porto. United Airlines is currently priced 29% below the average price you’ll pay for this route.

  • 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 July is currently the most expensive (average of $634). 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 5 airlines flying from Philadelphia to Porto

Discover the top 5 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 noviembre 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$563Average$832FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$567Average$843FlexibilityNo cancel feeOn-time71%
IberiaCheapest$593Average$877FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$636Average$870FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$673Average$702FlexibilityNo cancel feeOn-time67%

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