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$856+ Cheap flights from Philadelphia (PHL) to San Sebastian (EAS)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/6. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — EAS
Feb 20 — Feb 271
Fri 2/20
Fri 2/27
1 adult, Economy
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Cheap flight deals from Philadelphia to San Sebastian

Cheapest flights from Philadelphia to San Sebastian
Explore the most affordable flight options available from Philadelphia to San Sebastian. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2026.

This American Airlines deal was found by Cheapflights users on 1/19. 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.
Fri 3/67:45 pm
PHL
-
EAS
1 stop19h 05m
American Airlines
Fri 3/139:20 am
EAS
-
PHL
2 stops17h 49m
American Airlines
Deal found 1/19$856
This Trip.com deal was found by Cheapflights users on 1/19. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/67:45 pm
PHL
-
EAS
1 stop19h 05m
Iberia
Fri 3/139:30 pm
EAS
-
PHL
1 stop24h 25m
Iberia
Deal found 1/19$1,074
This Iberia deal was found by Cheapflights users on 1/20. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/237:50 pm
PHL
-
EAS
2 stops19h 00m
Iberia
Tue 1/279:20 am
EAS
-
PHL
2 stops16h 07m
Iberia
Deal found 1/20$1,886

Find flight deals from Philadelphia to San Sebastian

Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) to San Sebastian (EAS). 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 January 21, 2026.

Most accurate provider

Expedia
2 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$856
(American Airlines)
Provider with most accurate pricing for Philadelphia-San Sebastián flight deals.
Search Deals
Provider most trusted by Cheapflights users for Philadelphia-San Sebastián flights.
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From Philadelphia to San Sebastián
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Philadelphia to San Sebastian 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 January 21, 2026.
Use the filters below to find and compare flights from Philadelphia to San Sebastian that are best for you.

Fly from

Philadelphia

Fly to

San Sebastian

Route

Depart

Return

Price

PhiladelphiaSan Sebastian

PHL - EAS

PHLEAS

Philadelphia

Fri 3/6

7:45 pm-8:50 pm

1 stop19h 05m

San Sebastián

Fri 3/13

9:20 am-10:09 pm

2 stops17h 49m

$856

PhiladelphiaSan Sebastian

PHL - EAS

PHLEAS

Philadelphia

Fri 3/6

7:45 pm-8:50 pm

1 stop19h 05m

San Sebastián

Fri 3/13

9:30 pm-4:55 pm

1 stop24h 25m

$1,074

PhiladelphiaSan Sebastian

PHL - EAS

PHLEAS

Philadelphia

Fri 5/22

10:20 pm-8:40 am

2 stops28h 20m

$3,200

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Compare providers for flights from Philadelphia to San Sebastian

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 San Sebastian in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars

*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-San Sebastian flights, users find the pricing of Expedia to be most consistent on Cheapflights vs. Expedia Users can find the same prices on Philadelphia-San Sebastian flight deals on Cheapflights vs. Expedia 90-95% of the time. Price accuracy is based on data collected from Philadelphia-San Sebastian flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Philadelphia-San Sebastian flights, Cheapflights users trust Expedia the most. Expedia 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-San Sebastian 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 San Sebastian

Have a flexible travel schedule? Discover the best time to fly to San Sebastian 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 San Sebastian

What is the cheapest month to book a flight from Philadelphia to San Sebastian?

Currently, October is the cheapest month in which you can book a flight from Philadelphia to San Sebastian (average of $361). Flying from Philadelphia to San Sebastian in June is currently the most expensive (average of $733). 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.

Related info for your journey

Find useful and relevant information for your journey from Philadelphia to San Sebastian. 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 San Sebastian?

    Departing from Philadelphia to San Sebastian will take you 19h 05m. There are 3673 mi between Philadelphia and San Sebastian.

  • Can I find deals for flights from Philadelphia to San Sebastian that include hotel bookings?

    Yes. In addition to deals on Philadelphia to San Sebastian flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Philadelphia to San Sebastian?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to San Sebastian.

  • Can I find deals for business class flights from Philadelphia to San Sebastian?

    Yes. Cheapflights offers flight deals from Philadelphia to San Sebastian 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 San Sebastian?

    Currently, October is the cheapest month in which you can book a flight from Philadelphia to San Sebastian (average of $361). Flying from Philadelphia to San Sebastian in June is currently the most expensive (average of $733). 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.

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