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$272+ 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 10/3. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — OPO
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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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 3, 2025.

Round-trip from

$627
(CrystalTravel)

One-way from

$272
(Kiwi.com)

Popular in

June

Cheapest in

December

Average price

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

This CrystalTravel deal was found by Cheapflights users on 7/2. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/215:35 pmPHL - OPO
1 stop12h 40mLufthansa
Thu 9/46:00 amOPO - PHL
1 stop15h 00mLufthansa
Deal found 7/2$627
This Gotogate deal was found by Cheapflights users on 7/3. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/33:30 pmPHL - OPO
2 stops16h 20mMultiple Airlines
Sat 11/156:00 amOPO - PHL
2 stops21h 56mMultiple Airlines
Deal found 7/3$634
This United Airlines deal was found by Cheapflights users on 7/1. 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.
Thu 8/211:03 pmPHL - OPO
2 stops15h 42mUnited Airlines
Thu 9/412:10 pmOPO - PHL
2 stops28h 46mUnited Airlines
Deal found 7/1$636
This Air Canada deal was found by Cheapflights users on 7/3. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/203:25 pmPHL - OPO
1 stop13h 10mAir Canada
Mon 9/296:00 amOPO - PHL
2 stops20h 38mAir Canada
Deal found 7/3$638
This British Airways deal was found by Cheapflights users on 7/3. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/37:45 pmPHL - OPO
1 stop15h 55mBritish Airways
Sat 11/158:40 pmOPO - PHL
1 stop23h 55mBritish Airways
Deal found 7/3$654
This Iberia deal was found by Cheapflights users on 7/2. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/11:35 pmPHL - OPO
2 stops18h 10mIberia
Tue 11/118:20 amOPO - PHL
2 stops17h 00mIberia
Deal found 7/2$658
This American Airlines deal was found by Cheapflights users on 7/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2710:47 amPHL - OPO
2 stops15h 48mAmerican Airlines
Sun 10/58:15 amOPO - PHL
2 stops18h 30mAmerican Airlines
Deal found 7/2$670
This Delta deal was found by Cheapflights users on 7/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/81:00 pmPHL - OPO
2 stops21h 30mDelta
Wed 10/156:15 amOPO - PHL
2 stops20h 58mDelta
Deal found 7/1$708
This Air France deal was found by Cheapflights users on 7/1. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/191:38 pmPHL - OPO
2 stops13h 47mAir France
Tue 8/266:35 amOPO - PHL
2 stops16h 15mAir France
Deal found 7/1$787
This oojo deal was found by Cheapflights users on 7/2. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2710:20 amPHL - OPO
1 stop19h 35mTAP AIR PORTUGAL
Fri 10/311:00 amOPO - PHL
2 stops27h 22mTAP AIR PORTUGAL
Deal found 7/2$801

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 3, 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

Thu 8/21

5:35 pm-11:15 am

1 stop12h 40m

Porto

Thu 9/4

6:00 am-4:00 pm

1 stop15h 00m

$627

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 11/3

3:30 pm-12:50 pm

2 stops16h 20m

Porto

Sat 11/15

6:00 am-10:56 pm

2 stops21h 56m

$634

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Thu 8/21

1:03 pm-9:45 am

2 stops15h 42m

Porto

Thu 9/4

12:10 pm-11:56 am

2 stops28h 46m

$636

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Sat 9/20

3:25 pm-9:35 am

1 stop13h 10m

Porto

Mon 9/29

6:00 am-9:38 pm

2 stops20h 38m

$638

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 11/3

7:45 pm-4:40 pm

1 stop15h 55m

Porto

Sat 11/15

8:40 pm-3:35 pm

1 stop23h 55m

$654

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Sat 11/1

1:35 pm-11:45 am

2 stops18h 10m

Porto

Tue 11/11

8:20 am-8:20 pm

2 stops17h 00m

$658

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Sat 9/27

10:47 am-7:35 am

2 stops15h 48m

Porto

Sun 10/5

8:15 am-9:45 pm

2 stops18h 30m

$670

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Wed 10/8

1:00 pm-3:30 pm

2 stops21h 30m

Porto

Wed 10/15

6:15 am-10:13 pm

2 stops20h 58m

$708

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Tue 8/19

1:38 pm-8:25 am

2 stops13h 47m

Porto

Tue 8/26

6:35 am-5:50 pm

2 stops16h 15m

$787

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Sat 9/27

10:20 am-10:55 am

1 stop19h 35m

Porto

Fri 10/3

11:00 am-9:22 am

2 stops27h 22m

$801

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Showing 1-10 of 18 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 $1,033). 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 3, 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 3, 2025.
See what other customers who have flown with Delta, KLM, and Air France 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
7,982 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Overall

8.0

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
7,982 reviews
Delta
8.0
Very good
7,982 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Overall

8.0

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!
KLM
7.8
Good
1,367 reviews
Delta
8.0
Very good
7,982 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Overall

8.0

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 France
7.5
Good
1,465 reviews
Delta
8.0
Very good
7,982 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Overall

8.0

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
8,861 reviews
Delta
8.0
Very good
7,982 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Overall

8.0

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
7,982 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Overall

8.0

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, Lufthansa ($627), United Airlines ($636), and Iberia ($658) offers the cheapest pricing from Philadelphia to Porto. Lufthansa is currently priced 22% below the average price you’ll pay for this route.

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

    $437 is the cheapest one-way deal found within the past few days, from TAP AIR PORTUGAL. You may also be able to find cheap deals on British Airways and Air Canada, with prices starting from $442 and $454, 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 $1,033). 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

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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 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 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$567Average$868FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$601Average$832FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$612Average$702FlexibilityNo cancel feeOn-time67%
British AirwaysCheapest$616Average$764FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$617Average$818FlexibilityNo cancel feeOn-time76%
IberiaCheapest$657Average$896FlexibilityNo cancel feeOn-time77%

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