HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Porto

$279+ 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 9/20. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — OPO
Jul 13 — Jul 201
Sun 7/13
Sun 7/20
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.

Cheapflights Tip: The best prices from Philadelphia to Porto are usually found in December or November, booked 42 days in advance, depart on a Sunday or Saturday and return on a Tuesday

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 July 8, 2025.

Round-trip from

$638
(United Airlines)

One-way from

$279
(Kiwi.com)

Popular in

June

Cheapest in

December

Average price

$872
From Philadelphia to Porto
Search Deals
One-way flight from Philadelphia to Porto
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($178 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

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 July 8, 2025.

This Kiwi.com deal was found by Cheapflights users on 7/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/35:30 pmPHL - OPO
1 stop16h 25mMultiple Airlines
Wed 12/106:45 amOPO - PHL
1 stop14h 15mMultiple Airlines
Deal found 7/8$552
This Ovago deal was found by Cheapflights users on 7/8. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/37:45 pmPHL - OPO
1 stop15h 20mBritish Airways
Fri 12/128:20 amOPO - PHL
1 stop12h 15mBritish Airways
Deal found 7/8$588
This United Airlines deal was found by Cheapflights users on 7/8. 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 12/25:40 pmPHL - OPO
1 stop13h 00mUnited Airlines
Thu 12/116:00 amOPO - PHL
1 stop15h 00mUnited Airlines
Deal found 7/8$602
This Iberia deal was found by Cheapflights users on 7/8. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/18:00 pmPHL - OPO
1 stop19h 00mIberia
Tue 12/168:20 amOPO - PHL
2 stops17h 00mIberia
Deal found 7/8$604
This Air Canada deal was found by Cheapflights users on 7/7. 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.
Sun 10/123:25 pmPHL - OPO
2 stops39h 00mAir Canada
Wed 10/226:00 amOPO - PHL
2 stops20h 38mAir Canada
Deal found 7/7$627
This Lufthansa deal was found by Cheapflights users on 7/7. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/145:35 pmPHL - OPO
1 stop17h 10mLufthansa
Thu 10/236:00 amOPO - PHL
1 stop15h 00mLufthansa
Deal found 7/7$633
This KLM deal was found by Cheapflights users on 7/7. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/156:15 pmPHL - OPO
2 stops16h 15mKLM
Sat 10/256:05 amOPO - PHL
2 stops16h 12mKLM
Deal found 7/7$677

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 July 8, 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

Wed 10/29

9:00 pm-8:00 pm

1 stop19h 00m

Porto

Wed 11/12

8:20 am-3:35 pm

1 stop12h 15m

$594

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Tue 11/4

5:40 pm-11:40 am

1 stop13h 00m

Porto

Thu 11/13

6:00 am-4:05 pm

1 stop15h 05m

$602

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 11/3

12:40 pm-2:55 pm

2 stops21h 15m

Porto

Thu 11/13

6:00 am-4:05 pm

1 stop15h 05m

$607

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Wed 10/29

4:35 pm-11:50 am

2 stops39h 15m

Porto

Tue 11/18

6:00 am-10:56 pm

2 stops21h 56m

$609

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Wed 10/29

1:00 pm-10:50 am

2 stops17h 50m

Porto

Mon 11/17

11:15 am-5:17 pm

2 stops35h 02m

$641

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 8/18

9:59 pm-11:30 am

3 stops32h 31m

Porto

Tue 9/2

12:50 pm-2:56 pm

3 stops31h 06m

$648

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Wed 10/15

6:15 pm-3:30 pm

2 stops16h 15m

Porto

Sat 10/25

6:05 am-5:17 pm

2 stops16h 12m

$677

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Sat 9/20

5:59 pm-9:15 am

2 stops58h 16m

$279

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 9/22

3:25 pm-9:35 am

1 stop13h 10m

$489

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Thu 9/25

10:47 am-7:35 am

2 stops15h 48m

$508

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/6

Showing 1-10 of 14 results
1
2

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 June 27, 2025.

Booking 40 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, January is the cheapest month in which you can book a flight from Philadelphia to Porto (average of $523). Flying from Philadelphia to Porto in June is currently the most expensive (average of $1,032). 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 July 8, 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 13% on airfare.

What is the cheapest day to fly from Philadelphia to Porto?

Use this chart to determine the cheapest time to fly round-trip from Philadelphia to Porto. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Philadelphia to Porto flight should consider departing on Friday at noon when fares are most often at their lowest. Wednesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 July 8, 2025.
See what other customers who have flown with Delta, United Airlines, and American Airlines 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.
Delta
8.0
Very good
7,958 reviews

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,958 reviews
Delta
8.0
Very good
7,958 reviews

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,844 reviews
Delta
8.0
Very good
7,958 reviews

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,958 reviews

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air Canada
7.1
Good
9,683 reviews
Delta
8.0
Very good
7,958 reviews

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
TAP AIR PORTUGAL
7.1
Good
1,912 reviews
Delta
8.0
Very good
7,958 reviews

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 ($638), Air Canada ($655), and Iberia ($671) offers the cheapest pricing from Philadelphia to Porto. United Airlines is currently priced 20% below the average price you’ll pay for this route.

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

    $489 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on American Airlines and Lufthansa, with prices starting from $508 and $534, 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 $523). Flying from Philadelphia to Porto in June is currently the most expensive (average of $1,032). 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 Philadelphia?

Book flights to Philadelphia if you plan to visit one of these locations
Aveiro
Coimbra
Matosinhos

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.

Alternative routes for Philadelphia to Porto

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Lisbon flights
Newark to Lisbon flights
LaGuardia to Lisbon flights
Dulles Intl to Lisbon flights
Newark to Porto flights
John F Kennedy Intl to Porto flights
Reagan-National to Lisbon flights
Philadelphia to Lisbon flights
John F Kennedy Intl to Ponta Delgada flights
LaGuardia to Porto flights
Newark to Ponta Delgada flights
Newark to Funchal flights
John F Kennedy Intl to Funchal flights
John F Kennedy Intl to Faro flights
Newark to Faro flights
Dulles Intl to Porto flights
LaGuardia to Funchal flights
Reagan-National to Porto flights
LaGuardia to Faro flights
Pittsburgh to Lisbon flights
LaGuardia to Ponta Delgada flights
Dulles Intl to Faro flights
Dulles Intl to Ponta Delgada flights
Reagan-National to Faro flights
Reagan-National to Ponta Delgada flights
Dulles Intl to Funchal flights
Pittsburgh to Porto flights
Reagan-National to Funchal flights
John F Kennedy Intl to Lajes flights
Newark to Porto Santo flights
Newark to Lajes flights
Philadelphia to Ponta Delgada flights
Allentown to Lisbon flights
LaGuardia to Lajes flights
Philadelphia to Funchal flights
Dulles Intl to Lajes flights
Philadelphia to Faro flights
John F Kennedy Intl to Horta flights
Newark to Horta flights
Pittsburgh to Ponta Delgada flights
Dulles Intl to Porto Santo flights
Harrisburg to Lisbon flights

Top 6 airlines flying from Philadelphia to Porto

Discover the top 6 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 July 8, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$567Average$848FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$601Average$832FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$616Average$764FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$617Average$818FlexibilityNo cancel feeOn-time76%
IberiaCheapest$657Average$896FlexibilityNo cancel feeOn-time77%
Air CanadaCheapest$673Average$702FlexibilityNo cancel feeOn-time67%

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.