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$331+ 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 3/10. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — OPO
Mar 5 — Mar 121
Thu 3/5
Thu 3/12
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 February 3, 2026.

This Mytrip deal was found by Cheapflights users on 2/2. 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.
Wed 3/113:30 pm
PHL
-
OPO
2 stops17h 45m
Multiple Airlines
Mon 3/1612:30 pm
OPO
-
PHL
1 stop32h 35m
Multiple Airlines
Deal found 2/2$486
This Air France deal was found by Cheapflights users on 2/3. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/1812:16 pm
PHL
-
OPO
2 stops17h 14m
Multiple Airlines
Wed 2/255:00 am
OPO
-
PHL
2 stops19h 25m
Multiple Airlines
Deal found 2/3$495
This United Airlines deal was found by Cheapflights users on 2/1. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/221:27 pm
PHL
-
OPO
2 stops21h 13m
United Airlines
Fri 5/86:00 am
OPO
-
PHL
1 stop15h 05m
United Airlines
Deal found 2/1$499
This Iberia deal was found by Cheapflights users on 2/1. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/148:15 pm
PHL
-
OPO
1 stop18h 45m
Iberia
Fri 4/248:20 am
OPO
-
PHL
1 stop14h 15m
Iberia
Deal found 2/1$500
This United Airlines deal was found by Cheapflights users on 2/2. 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 4/147:45 pm
PHL
-
OPO
2 stops38h 55m
United Airlines
Fri 4/246:00 am
OPO
-
PHL
1 stop15h 05m
United Airlines
Deal found 2/2$505
This FlightHub deal was found by Cheapflights users on 2/2. 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.
Mon 3/93:30 pm
PHL
-
OPO
2 stops16h 35m
Multiple Airlines
Mon 3/304:35 pm
OPO
-
PHL
1 stop28h 30m
Multiple Airlines
Deal found 2/2$507
This Iberia deal was found by Cheapflights users on 2/3. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/187:45 pm
PHL
-
OPO
1 stop19h 15m
Iberia
Wed 2/258:40 pm
OPO
-
PHL
1 stop23h 45m
Iberia
Deal found 2/3$508
This American Airlines deal was found by Cheapflights users on 2/3. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/181:46 pm
PHL
-
OPO
2 stops16h 59m
American Airlines
Wed 2/258:40 pm
OPO
-
PHL
1 stop23h 45m
American Airlines
Deal found 2/3$512
This United Airlines deal was found by Cheapflights users on 2/1. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1310:05 am
PHL
-
OPO
1 stop15h 55m
United Airlines
Wed 10/286:00 am
OPO
-
PHL
2 stops31h 24m
United Airlines
Deal found 2/1$517

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 February 3, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$486
(Mytrip)

One-way from

$331
(Kiwi.com)

Popular in

May

Cheapest in

November

Average price

$867
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. 6% potential increase in price ($50 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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 February 3, 2026.
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

Wed 2/18

12:16 pm-10:30 am

2 stops17h 14m

Porto

Wed 2/25

5:00 am-7:25 pm

2 stops19h 25m

$495

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Wed 4/22

1:27 pm-3:40 pm

2 stops21h 13m

Porto

Fri 5/8

6:00 am-4:05 pm

1 stop15h 05m

$499

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 3/16

4:35 pm-2:55 pm

2 stops18h 20m

Porto

Mon 3/23

4:15 pm-5:05 pm

1 stop28h 50m

$524

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 5/4

9:25 am-3:25 pm

2 stops25h 00m

Porto

Fri 5/8

5:00 am-11:07 pm

2 stops23h 07m

$533

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Sun 3/1

6:27 am-9:30 am

2 stops22h 03m

Porto

Sun 3/8

6:00 am-4:05 pm

1 stop15h 05m

$538

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 5/4

9:25 am-3:25 pm

2 stops25h 00m

Porto

Mon 5/11

4:20 pm-7:25 pm

2 stops32h 05m

$544

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Wed 3/11

12:10 pm-3:25 pm

2 stops23h 15m

Porto

Mon 3/16

12:30 pm-10:14 am

2 stops25h 44m

$559

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Thu 3/19

6:40 pm-11:40 am

1 stop13h 00m

Porto

Thu 3/26

12:30 pm-1:51 pm

2 stops53h 21m

$576

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Tue 4/14

10:33 am-3:40 pm

2 stops24h 07m

Porto

Fri 4/24

6:00 am-4:05 pm

1 stop15h 05m

$584

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Sun 5/3

6:00 am-3:25 pm

2 stops28h 25m

Porto

Mon 5/11

4:20 pm-10:14 pm

2 stops34h 54m

$594

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/2

Showing 1-10 of 21 results
1
2
3

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 February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
OvagoPrice Accuracy2 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

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 January 30, 2026.

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, April is the cheapest month in which you can book a flight from Philadelphia to Porto (average of $377). Flying from Philadelphia to Porto in June is currently the most expensive (average of $629). 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.

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 February 3, 2026.
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
9,236 reviews

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Comfort

7.3

Entertainment

7.1

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
9,236 reviews
United Airlines
7.4
Good
9,236 reviews

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Comfort

7.3

Entertainment

7.1

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
7.2
Good
11,218 reviews
United Airlines
7.4
Good
9,236 reviews

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Comfort

7.3

Entertainment

7.1

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
3,103 reviews
United Airlines
7.4
Good
9,236 reviews

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Comfort

7.3

Entertainment

7.1

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
7,759 reviews
United Airlines
7.4
Good
9,236 reviews

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Comfort

7.3

Entertainment

7.1

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
British Airways
6.7
Okay
7,712 reviews
United Airlines
7.4
Good
9,236 reviews

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Comfort

7.3

Entertainment

7.1

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 18h 20m. United Airlines provides one of the quickest options available for as low as $524. 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 American Airlines ($567) offers the cheapest pricing from Philadelphia to Porto. United Airlines is currently priced 37% below the average price you’ll pay for this route.

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

    $331 is the cheapest one-way deal found within the past few days, from Iberia. You may also be able to find cheap deals on Lufthansa and United Airlines, with prices starting from $456 and $478, 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, April is the cheapest month in which you can book a flight from Philadelphia to Porto (average of $377). Flying from Philadelphia to Porto in June is currently the most expensive (average of $629). 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

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Alternative routes for Philadelphia to Porto

See prices for flight routes from nearby airports that may be better suited for you.
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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 February 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$489Average$795FlexibilityNo cancel feeOn-time69%
IberiaCheapest$546Average$855FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$567Average$860FlexibilityNo cancel feeOn-time71%
LufthansaCheapest$576Average$892FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$616Average$885FlexibilityNo cancel feeOn-time70%

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