HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Porto

$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 10/27. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — OPO
Jun 24 — Jul 11
Wed 6/24
Wed 7/1
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Philadelphia to Porto 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 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 May 25, 2026.

This United Airlines deal was found by Cheapflights users on 5/21. 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 11/91:00 pm
PHL
-
OPO
2 stops15h 30m
United Airlines
Fri 11/206:00 am
OPO
-
PHL
2 stops38h 51m
United Airlines
Deal found 5/21$709
This American Airlines deal was found by Cheapflights users on 5/21. 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.
Mon 11/97:50 pm
PHL
-
OPO
1 stop19h 10m
Multiple Airlines
Fri 11/208:20 am
OPO
-
PHL
2 stops18h 06m
Multiple Airlines
Deal found 5/21$715
This KAYAK deal was found by Cheapflights users on 5/24. 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.
Sat 10/314:56 pm
PHL
-
OPO
2 stops45h 34m
SWISS
Mon 11/97:20 pm
OPO
-
PHL
2 stops31h 12m
SWISS
Deal found 5/24$723
This United Airlines deal was found by Cheapflights users on 5/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/133:25 pm
PHL
-
OPO
1 stop10h 35m
United Airlines
Fri 10/236:00 am
OPO
-
PHL
1 stop15h 05m
United Airlines
Deal found 5/22$726
This Air Canada deal was found by Cheapflights users on 5/22. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/133:25 pm
PHL
-
OPO
1 stop10h 35m
Air Canada
Fri 10/236:00 am
OPO
-
PHL
2 stops20h 32m
Air Canada
Deal found 5/22$730
This Air Canada deal was found by Cheapflights users on 5/22. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1310:30 am
PHL
-
OPO
2 stops15h 30m
Multiple Airlines
Fri 10/236:00 am
OPO
-
PHL
2 stops20h 32m
Multiple Airlines
Deal found 5/22$734
This United Airlines deal was found by Cheapflights users on 5/20. 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 10/203:25 pm
PHL
-
OPO
1 stop10h 35m
United Airlines
Wed 10/286:00 am
OPO
-
PHL
2 stops31h 24m
United Airlines
Deal found 5/20$736
This United Airlines deal was found by Cheapflights users on 5/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/66:10 am
PHL
-
OPO
2 stops22h 20m
United Airlines
Thu 12/106:00 am
OPO
-
PHL
1 stop15h 05m
United Airlines
Deal found 5/22$740
This Gotogate deal was found by Cheapflights users on 5/23. 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 Gotogate 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
Multiple Airlines
Wed 8/2611:20 am
OPO
-
PHL
1 stop15h 14m
Multiple Airlines
Deal found 5/23$747
This United Airlines deal was found by Cheapflights users on 5/24. 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 11/18:26 pm
PHL
-
OPO
2 stops32h 04m
United Airlines
Fri 11/66:00 am
OPO
-
PHL
2 stops33h 27m
United Airlines
Deal found 5/24$750
This United Airlines deal was found by Cheapflights users on 5/21. 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.
Thu 11/1910:10 am
PHL
-
OPO
2 stops18h 20m
United Airlines
Tue 11/246:00 am
OPO
-
PHL
1 stop15h 05m
United Airlines
Deal found 5/21$751

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 May 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$747
(Gotogate)

One-way from

$348
(United Airlines)

Popular in

February

Cheapest in

January

Average price

$860
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, 4% potential price rise
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 May 25, 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
Quickest round-trip

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Wed 8/19

10:05 am-7:00 am

1 stop15h 55m

Porto

Wed 8/26

2:25 pm-9:34 pm

1 stop12h 09m

$768

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Sat 9/19

7:40 pm-6:55 am

2 stops30h 15m

Porto

Tue 9/29

6:00 am-4:05 pm

1 stop15h 05m

$768

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Sun 10/25

7:29 pm-3:25 pm

2 stops15h 56m

Porto

Sun 11/1

11:25 am-11:02 pm

2 stops16h 37m

$774

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Sat 10/31

6:35 pm-11:45 am

2 stops37h 10m

Porto

Sun 11/8

6:00 am-10:27 am

2 stops33h 27m

$776

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Thu 10/15

9:40 am-8:30 am

2 stops17h 50m

Porto

Thu 10/22

5:00 am-10:38 pm

2 stops22h 38m

$792

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Fri 10/30

9:42 am-8:05 am

2 stops18h 23m

Porto

Sat 11/7

5:00 am-8:37 pm

2 stops20h 37m

$813

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 9/28

10:05 am-7:00 am

1 stop15h 55m

Porto

Thu 10/1

6:00 am-4:05 pm

1 stop15h 05m

$829

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Thu 9/17

6:56 pm-7:10 am

2 stops31h 14m

Porto

Fri 9/25

6:00 am-4:05 pm

1 stop15h 05m

$832

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Thu 8/6

6:10 am-6:55 am

2 stops19h 45m

Porto

Thu 8/20

11:50 am-9:34 pm

1 stop14h 44m

$833
Cheapest one-way

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Tue 10/27

11:39 am-9:30 am

2 stops17h 51m

$348

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/23

Showing 1-10 of 19 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 May.
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 February is currently the most expensive (average of $1,224). 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 May 25, 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
9,751 reviews

Food

6.6

Crew

8.1

Entertainment

7.1

Comfort

7.3

Overall

7.4

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
United Airlines
7.4
Good
9,751 reviews
United Airlines
7.4
Good
9,751 reviews

Food

6.6

Crew

8.1

Entertainment

7.1

Comfort

7.3

Overall

7.4

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
American Airlines
7.1
Good
11,631 reviews
United Airlines
7.4
Good
9,751 reviews

Food

6.6

Crew

8.1

Entertainment

7.1

Comfort

7.3

Overall

7.4

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
Iberia
7.0
Good
3,219 reviews
United Airlines
7.4
Good
9,751 reviews

Food

6.6

Crew

8.1

Entertainment

7.1

Comfort

7.3

Overall

7.4

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
Lufthansa
6.8
Okay
8,029 reviews
United Airlines
7.4
Good
9,751 reviews

Food

6.6

Crew

8.1

Entertainment

7.1

Comfort

7.3

Overall

7.4

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.

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 55m. United Airlines provides one of the quickest options available for as low as $768. 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), Iberia ($546), and Lufthansa ($549) offers the cheapest pricing from Philadelphia to Porto. United Airlines is currently priced 40% 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, 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 February is currently the most expensive (average of $1,224). 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

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

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 May 25, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$489Average$789FlexibilityNo cancel feeOn-time69%
IberiaCheapest$546Average$748FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$549Average$894FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$567Average$910FlexibilityNo cancel feeOn-time71%

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.