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$395+ 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 7/27. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — OPO
May 10 — May 171
Sun 5/10
Sun 5/17
1 adult, Economy
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Find cheap flights from Philadelphia to Porto with Cheapflights

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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 April 10, 2026.

This Air Canada deal was found by Cheapflights users on 4/5. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/163:30 pm
PHL
-
OPO
2 stops16h 20m
Air Canada
Fri 11/206:00 am
OPO
-
PHL
2 stops21h 46m
Air Canada
Deal found 4/5$749
This United Airlines deal was found by Cheapflights users on 4/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/256:10 am
PHL
-
OPO
2 stops23h 20m
United Airlines
Sun 11/16:00 am
OPO
-
PHL
2 stops37h 47m
United Airlines
Deal found 4/5$780
This United Airlines deal was found by Cheapflights users on 4/10. 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.
Sat 9/198:30 pm
PHL
-
OPO
2 stops29h 25m
United Airlines
Tue 9/2912:15 pm
OPO
-
PHL
2 stops34h 07m
United Airlines
Deal found 4/10$799
This Air Canada deal was found by Cheapflights users on 4/8. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/223:25 pm
PHL
-
OPO
1 stop10h 35m
Air Canada
Thu 10/1511:40 am
OPO
-
PHL
1 stop14h 52m
Air Canada
Deal found 4/8$817
This Air Canada deal was found by Cheapflights users on 4/8. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2210:28 am
PHL
-
OPO
2 stops15h 32m
Air Canada
Tue 10/1312:15 pm
OPO
-
PHL
1 stop31h 32m
Air Canada
Deal found 4/8$822
This Air Canada deal was found by Cheapflights users on 4/8. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2210:05 am
PHL
-
OPO
1 stop15h 55m
Air Canada
Wed 10/1412:45 pm
OPO
-
PHL
2 stops39h 01m
Air Canada
Deal found 4/8$825
This United Airlines deal was found by Cheapflights users on 4/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/193:25 pm
PHL
-
OPO
1 stop10h 35m
United Airlines
Sun 8/3012:15 pm
OPO
-
PHL
1 stop31h 34m
United Airlines
Deal found 4/5$827
This United Airlines deal was found by Cheapflights users on 4/8. 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 9/2210:05 am
PHL
-
OPO
1 stop15h 55m
United Airlines
Fri 10/1612:35 pm
OPO
-
PHL
2 stops35h 05m
United Airlines
Deal found 4/8$829
This United Airlines deal was found by Cheapflights users on 4/8. 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 9/206:00 am
PHL
-
OPO
2 stops22h 45m
United Airlines
Tue 10/1312:35 pm
OPO
-
PHL
2 stops25h 49m
United Airlines
Deal found 4/8$830
This United Airlines deal was found by Cheapflights users on 4/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/1410:00 am
PHL
-
OPO
2 stops20h 10m
United Airlines
Fri 4/2412:35 pm
OPO
-
PHL
2 stops17h 24m
United Airlines
Deal found 4/5$834
This United Airlines deal was found by Cheapflights users on 4/9. 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 12/78:26 pm
PHL
-
OPO
2 stops37h 49m
United Airlines
Fri 12/1112:30 pm
OPO
-
PHL
1 stop32h 35m
United Airlines
Deal found 4/9$836

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 April 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$799
(United Airlines)

One-way from

$395
(United Airlines)

Popular in

February

Cheapest in

January

Average price

$877
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
High demand for flights, 13% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
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 April 10, 2026.
Use the filters below to find and compare flights from Philadelphia to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Sat 9/19

8:30 pm-6:55 am

2 stops29h 25m

Porto

Tue 9/29

12:15 pm-5:22 pm

2 stops34h 07m

$799

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Wed 8/19

3:25 pm-7:00 am

1 stop10h 35m

Porto

Sun 8/30

12:15 pm-2:49 pm

1 stop31h 34m

$827

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Thu 8/6

6:00 am-6:55 am

2 stops19h 55m

Porto

Thu 8/20

11:50 am-7:19 pm

2 stops36h 29m

$885

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 9/21

9:40 am-3:25 pm

2 stops24h 45m

Porto

Mon 10/12

4:25 pm-5:15 pm

2 stops29h 50m

$915

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Sat 9/19

3:25 pm-10:55 am

1 stop14h 30m

Porto

Tue 9/29

9:00 am-9:50 am

2 stops29h 50m

$954

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Fri 5/8

12:38 pm-3:25 pm

2 stops21h 47m

Porto

Tue 5/12

5:00 am-10:12 pm

2 stops22h 12m

$958
Quickest round-trip

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Tue 5/12

12:38 pm-6:20 pm

2 stops24h 42m

Porto

Wed 5/20

5:00 am-4:30 pm

2 stops16h 30m

$959

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Wed 5/13

5:18 pm-10:00 pm

2 stops23h 42m

Porto

Mon 5/18

4:20 pm-5:51 pm

2 stops30h 31m

$975
Cheapest one-way

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 7/27

9:21 am-6:55 am

2 stops16h 34m

$395

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 7/20

8:30 pm-11:45 am

1 stop10h 15m

$405

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/5

Showing 1-10 of 18 resultsSorted by cheapest first
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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star

*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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Philadelphia-Porto flight deals on Cheapflights vs. FlightHub >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 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 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, April is the cheapest month in which you can book a flight from Philadelphia to Porto (average of $375). Flying from Philadelphia to Porto in July is currently the most expensive (average of $547). 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.

How much does it cost to fly round-trip from Philadelphia to Porto?

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 April 10, 2026.
See what other customers who have flown with United Airlines,American Airlines, andIberia 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
9,557 reviews

Entertainment

7.1

Comfort

7.3

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,557 reviews
United Airlines
7.4
Good
9,557 reviews

Entertainment

7.1

Comfort

7.3

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
American Airlines
7.1
Good
11,564 reviews
United Airlines
7.4
Good
9,557 reviews

Entertainment

7.1

Comfort

7.3

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Iberia
7.0
Good
3,174 reviews
United Airlines
7.4
Good
9,557 reviews

Entertainment

7.1

Comfort

7.3

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Lufthansa
6.8
Okay
7,900 reviews
United Airlines
7.4
Good
9,557 reviews

Entertainment

7.1

Comfort

7.3

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

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 29h 25m. United Airlines provides one of the quickest options available for as low as $799. Philadelphia and Porto are separated by a distance of 3403 mi.

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

    According to our current data, United Airlines ($489), Iberia ($546), and American Airlines ($567) offers the cheapest pricing from Philadelphia to Porto. United Airlines is currently priced 38% 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, April is the cheapest month in which you can book a flight from Philadelphia to Porto (average of $375). Flying from Philadelphia to Porto in July is currently the most expensive (average of $547). 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
Vila Nova de Gaia
Aveiro
Arcos de Valdevez
Coimbra

Browse thousands of different options on Cheapflights for your next trip

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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 April 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$489Average$682FlexibilityNo cancel feeOn-time69%
IberiaCheapest$546Average$748FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$567Average$893FlexibilityNo cancel feeOn-time71%
LufthansaCheapest$568Average$934FlexibilityNo cancel feeOn-time76%

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