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$368+ 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 10/24. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — OPO
Sep 3 — Sep 101
Thu 9/3
Thu 9/10
1 adult, Economy
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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 August 4, 2026.

This Expedia deal was found by Cheapflights users on 8/1. 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 11/23:20 pm -
2 stops15h 45m
Sun 11/86:00 am -
1 stop15h 05m
Deal found 8/1$730
This Expedia deal was found by Cheapflights users on 8/3. 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.
Wed 10/2110:05 am -
1 stop15h 55m
Sat 10/3112:05 pm -
2 stops33h 00m
Deal found 8/3$741
This FlightHub deal was found by Cheapflights users on 8/3. 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.
Sun 10/256:40 pm -
1 stop16h 40m
Sun 11/17:20 pm -
2 stops49h 45m
Deal found 8/3$744
This Expedia deal was found by Cheapflights users on 7/31. 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.
Sun 11/15:40 pm -
1 stop16h 40m
Sat 11/74:10 pm -
1 stop28h 55m
Deal found 7/31$756
This FlightHub deal was found by Cheapflights users on 8/3. 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.
Sun 11/19:15 am -
2 stops28h 15m
Sun 11/86:00 am -
1 stop15h 05m
Deal found 8/3$758
This FlightHub deal was found by Cheapflights users on 7/31. 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.
Sun 10/256:40 pm -
1 stop13h 05m
Sun 11/16:00 am -
1 stop15h 05m
Deal found 7/31$759
This Justfly.com deal was found by Cheapflights users on 8/3. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/15:40 pm -
1 stop13h 05m
Sun 11/86:00 am -
1 stop15h 05m
Deal found 8/3$760

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 August 4, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$730
(Expedia)

One-way from

$368
(Kiwi.com)

Popular in

February

Cheapest in

January

Average price

$885
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, 9% potential price rise
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($35 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 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 August 4, 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

Mon 11/2

6:46 pm-9:30 am

2 stops33h 44m

Porto

Sun 11/8

6:00 am-2:17 pm

2 stops37h 17m

$766

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Sun 10/25

6:40 pm-6:30 pm

2 stops19h 50m

Porto

Sun 11/1

6:35 pm-4:05 pm

2 stops50h 30m

$796

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Thu 9/24

6:10 am-3:45 pm

2 stops28h 35m

Porto

Fri 10/2

6:00 am-9:42 am

2 stops32h 42m

$847

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Sat 9/12

6:56 pm-9:45 am

2 stops33h 49m

Porto

Mon 9/21

12:10 pm-9:43 am

2 stops50h 33m

$867

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Sat 10/31

9:45 am-9:30 am

2 stops19h 45m

Porto

Sun 11/8

12:35 pm-10:16 am

2 stops26h 41m

$869

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Sun 9/6

7:40 pm-9:45 am

2 stops33h 05m

Porto

Sat 9/19

12:20 pm-2:47 pm

1 stop31h 27m

$880

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 9/14

11:04 am-9:45 am

2 stops17h 41m

Porto

Mon 9/21

6:00 am-4:05 pm

1 stop15h 05m

$886
Quickest round-trip

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Thu 9/17

5:40 pm-3:45 pm

1 stop17h 05m

Porto

Thu 10/1

6:00 am-4:05 pm

1 stop15h 05m

$899

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Fri 9/18

6:56 pm-9:45 am

2 stops33h 49m

Porto

Thu 10/1

6:00 am-4:05 pm

1 stop15h 05m

$907

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Tue 8/25

3:25 pm-7:00 am

1 stop10h 35m

Porto

Sun 8/30

12:15 pm-9:43 pm

2 stops38h 28m

$908

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/3

Showing 1-10 of 17 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 August.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 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, January is the cheapest month in which you can book a flight from Philadelphia to Porto (average of $496). Flying from Philadelphia to Porto in December is currently the most expensive (average of $3,950). 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?

Airfare is below average for this route at the moment.

Philadelphia to Porto flights typically cost between $789 and $925 in November.
The cheapest round-trip price found within the last 5 days was $730 on Multiple Airlines (Nov 2-Nov 8).

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 August 4, 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
10,059 reviews

Comfort

7.3

Overall

7.4

Boarding

7.7

Entertainment

7.1

Food

6.7

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Dawn,Aug 2026

ORD - DEN

I missed my connecting flight because our plane took off ten minutes late and then when we got to the airport another plane was in our shoot waiting to get fueled up and that took 30 minutes so I missed my connecting flight. I asked if I could get off and they assured me the plane would most likely wait for me since they know what time the planes get in because of an app. I was not happy. I had to wait till 7:25 to board the next flight and then that was delayed. Gates changed till 9:20. Terrible
United Airlines
7.4
Good
10,059 reviews
United Airlines
7.4
Good
10,059 reviews

Comfort

7.3

Overall

7.4

Boarding

7.7

Entertainment

7.1

Food

6.7

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Dawn,Aug 2026

ORD - DEN

I missed my connecting flight because our plane took off ten minutes late and then when we got to the airport another plane was in our shoot waiting to get fueled up and that took 30 minutes so I missed my connecting flight. I asked if I could get off and they assured me the plane would most likely wait for me since they know what time the planes get in because of an app. I was not happy. I had to wait till 7:25 to board the next flight and then that was delayed. Gates changed till 9:20. Terrible
American Airlines
7.1
Good
11,853 reviews
United Airlines
7.4
Good
10,059 reviews

Comfort

7.3

Overall

7.4

Boarding

7.7

Entertainment

7.1

Food

6.7

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Dawn,Aug 2026

ORD - DEN

I missed my connecting flight because our plane took off ten minutes late and then when we got to the airport another plane was in our shoot waiting to get fueled up and that took 30 minutes so I missed my connecting flight. I asked if I could get off and they assured me the plane would most likely wait for me since they know what time the planes get in because of an app. I was not happy. I had to wait till 7:25 to board the next flight and then that was delayed. Gates changed till 9:20. Terrible
Iberia
7.0
Good
3,267 reviews
United Airlines
7.4
Good
10,059 reviews

Comfort

7.3

Overall

7.4

Boarding

7.7

Entertainment

7.1

Food

6.7

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Dawn,Aug 2026

ORD - DEN

I missed my connecting flight because our plane took off ten minutes late and then when we got to the airport another plane was in our shoot waiting to get fueled up and that took 30 minutes so I missed my connecting flight. I asked if I could get off and they assured me the plane would most likely wait for me since they know what time the planes get in because of an app. I was not happy. I had to wait till 7:25 to board the next flight and then that was delayed. Gates changed till 9:20. Terrible

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.

  • 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 ($695) offers the cheapest pricing from Philadelphia to Porto. United Airlines is currently priced 41% below the average price you’ll pay for this route.

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

    $287 is the cheapest one-way deal found within the past few days, from Iberia. You may also be able to find cheap deals on United Airlines and Air Canada, with prices starting from $321 and $321, 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, January is the cheapest month in which you can book a flight from Philadelphia to Porto (average of $496). Flying from Philadelphia to Porto in December is currently the most expensive (average of $3,950). 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
Arcos de Valdevez
Coimbra
Aveiro

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Top 3 airlines flying from Philadelphia to Porto

Discover the top 3 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 August 4, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$489Average$789FlexibilityNo cancel feeOn-time69%
IberiaCheapest$546Average$748FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$695Average$1,224FlexibilityNo cancel feeOn-time71%

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