$465 Cheap Flights from Philadelphia (PHL) to San Sebastian (EAS)

View $465 flight on Tue, Dec 2, 2025Opens in a new window

Popular airlines from Philadelphia Intl. Airport (PHL) to San Sebastian (EAS)

  • notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
  • deals illustration

    Book smarter

    Save up to 30% on select hotels after you book a flight*
  • trophy illustration

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Philadelphia to San Sebastian (PHL-EAS)

Prices were available within the past 7 days and start at $465 for one-way flights and $584 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Wed, Jan 28 - Wed, Feb 4
PHL
Philadelphia
EAS
San Sebastián
$584 Roundtrip, found 1 day ago
$584
Roundtrip
found 1 day ago
Select British Airways flight, departing Wed, Jan 28 from Philadelphia to San Sebastián, returning Wed, Feb 4, priced at $584 found 1 day ago
Iberia
Wed, Jan 28 - Wed, Feb 4
PHL
Philadelphia
EAS
San Sebastián
$586 Roundtrip, found 1 day ago
$586
Roundtrip
found 1 day ago
Select Iberia flight, departing Wed, Jan 28 from Philadelphia to San Sebastián, returning Wed, Feb 4, priced at $586 found 1 day ago
Iberia
Wed, Jan 28 - Wed, Feb 4
PHL
Philadelphia
EAS
San Sebastián
$586 Roundtrip, found 1 day ago
$586
Roundtrip
found 1 day ago
Select Iberia flight, departing Wed, Jan 28 from Philadelphia to San Sebastián, returning Wed, Feb 4, priced at $586 found 1 day ago
British Airways
Wed, Jan 28 - Wed, Feb 4
PHL
Philadelphia
EAS
San Sebastián
$588 Roundtrip, found 1 day ago
$588
Roundtrip
found 1 day ago
Select British Airways flight, departing Wed, Jan 28 from Philadelphia to San Sebastián, returning Wed, Feb 4, priced at $588 found 1 day ago
Iberia
Wed, Jan 28 - Wed, Feb 4
PHL
Philadelphia
EAS
San Sebastián
$596 Roundtrip, found 1 day ago
$596
Roundtrip
found 1 day ago
Select Iberia flight, departing Wed, Jan 28 from Philadelphia to San Sebastián, returning Wed, Feb 4, priced at $596 found 1 day ago
Iberia
Tue, Dec 2 - Sun, Dec 7
PHL
Philadelphia
EAS
San Sebastián
$598 Roundtrip, found 5 days ago
$598
Roundtrip
found 5 days ago
Select Iberia flight, departing Tue, Dec 2 from Philadelphia to San Sebastián, returning Sun, Dec 7, priced at $598 found 5 days ago
Iberia
Wed, Jan 28 - Wed, Feb 4
PHL
Philadelphia
EAS
San Sebastián
$602 Roundtrip, found 1 day ago
$602
Roundtrip
found 1 day ago
Select Iberia flight, departing Wed, Jan 28 from Philadelphia to San Sebastián, returning Wed, Feb 4, priced at $602 found 1 day ago
Iberia
Wed, Jan 28 - Wed, Feb 4
PHL
Philadelphia
EAS
San Sebastián
$606 Roundtrip, found 1 day ago
$606
Roundtrip
found 1 day ago
Select Iberia flight, departing Wed, Jan 28 from Philadelphia to San Sebastián, returning Wed, Feb 4, priced at $606 found 1 day ago
American Airlines
Tue, Dec 16 - Wed, Dec 24
PHL
Philadelphia
EAS
San Sebastián
$884 Roundtrip, found 2 hours ago
$884
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Tue, Dec 16 from Philadelphia to San Sebastián, returning Wed, Dec 24, priced at $884 found 2 hours ago
Finnair
Fri, Apr 3 - Thu, Apr 9
PHL
Philadelphia
EAS
San Sebastián
$1,071 Roundtrip, found 2 hours ago
$1,071
Roundtrip
found 2 hours ago
Select Finnair flight, departing Fri, Apr 3 from Philadelphia to San Sebastián, returning Thu, Apr 9, priced at $1,071 found 2 hours ago

Frequently asked questions

How much does a flight from Philadelphia Intl. Airport (PHL) to San Sebastian Airport (EAS) cost?
Grab a cheap one-way flight from $465 or cheap return flight from $584 from Philadelphia Intl. Airport (PHL) to San Sebastian Airport (EAS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Philadelphia Intl. Airport (PHL) to San Sebastian Airport (EAS)?
January is the most affordable month to fly from PHL to EAS. Planning your trip for the off-season is often the key to landing a great deal.
What is the cheapest airline that flies from Philadelphia Intl. Airport (PHL) to San Sebastian Airport (EAS)?
Expedia's filter tool lets you easily compare airlines, flight times and fares all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest PHL to EAS flight.
How many flights per day from Philadelphia Intl. Airport (PHL) to San Sebastian Airport (EAS)?
There aren't any daily direct flights departing from Philadelphia Intl. Airport (PHL) to San Sebastian Airport (EAS). But you can choose flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be on your way in no time.
What day of the week has the most flights from PHL to EAS?
You'll typically find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Philadelphia Intl. Airport (PHL) to San Sebastian Airport (EAS)?
To avoid potential delays on the Philadelphia Intl. Airport (PHL) to San Sebastian Airport (EAS) route, fly before 3 PM. Departures after this hour have a 22% higher chance of being canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Philadelphia Intl. Airport (PHL) to San Sebastian Airport (EAS) last-minute?
Holding off until just before your departure to book a ticket from PHL to EAS generally means paying more. While it's possible to find some last-minute discounts, they're not always guaranteed. Keep your travel plans flexible for the best chance of landing a bargain.
Is it cheaper to book a PHL to EAS flight and hotel package?
Booking a PHL to EAS flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels in one place. Choose from our wide range of accommodations and then add car rentals, flights and activities to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Philadelphia Intl. Airport (PHL) to San Sebastian Airport (EAS)?
Usually, it's possible to cancel or reschedule your PHL to EAS flight. However, for bookings made more than 24 hours ago, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find more information on our Customer Service portal.

Travel information

Origin airport
Philadelphia Intl.
Destination airport
San Sebastian
Airlines serving
American Airlines, Iberia
Roundtrip price
$584
Distance
3675 mi

Book with confidence

Philadelphia to San Sebastian Flights

The cheapest times to fly from Philadelphia to San Sebastian

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Philadelphia to San Sebastian are during the month of January. You can find some of the cheapest flights from Philadelphia to San Sebastian with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Philadelphia to San Sebastian

Sunday is one of the best days to book for cheap flights from Philadelphia to San Sebastian: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Philadelphia to San Sebastian

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Philadelphia to San Sebastian in 2025. You can also book with separate airlines for your outbound and return journeys, from $465 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Philadelphia to San Sebastian flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Philadelphia to San Sebastian airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Philadelphia to San Sebastian Flights

Explore a world of travel with Expedia

*Available to One Key members.