How does KAYAK find such low prices on flights from Pennsylvania to San Sebastian?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Pennsylvania to San Sebastian.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Pennsylvania to San Sebastian?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Sebastian from Pennsylvania is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Pennsylvania to San Sebastian?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Sebastian with an airline and back to Pennsylvania with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Pennsylvania to San Sebastian?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Sebastian from Pennsylvania up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

$384 CHEAP FLIGHTS from Pennsylvania to San Sebastian

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Flight Deals

Cheap Flights from Pennsylvania to San Sebastian

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Recent round-trip flight deals from Pennsylvania to San Sebastian

Tue, Mar 16 - Sun, Mar 21

4:49 pm - 4:55 pmPHL Philadelphia-EAS San Sebastián

19h 06m2 stops Boston Logan Intl Madrid Barajas

9:30 pm - 2:50 pmEAS San Sebastián-PHL Philadelphia

46h 20m2 stops Madrid Barajas London Heathrow

$837Iberia

Tue, Mar 16 - Sun, Mar 21

4:49 pm - 4:55 pmPHL Philadelphia-EAS San Sebastián

19h 06m2 stops Boston Logan Intl Madrid Barajas

9:30 pm - 4:50 pmEAS San Sebastián-PHL Philadelphia

24h 20m1 stop Madrid Barajas

$874Iberia

Tue, Mar 16 - Sun, Mar 21

7:25 pm - 4:55 pmPHL Philadelphia-EAS San Sebastián

16h 30m1 stop Madrid Barajas

9:30 pm - 4:50 pmEAS San Sebastián-PHL Philadelphia

24h 20m1 stop Madrid Barajas

$875Multiple Airlines

Wed, Mar 17 - Sat, Mar 20

7:35 pm - 8:40 amPHL Philadelphia-EAS San Sebastián

32h 05m2 stops London Heathrow Madrid Barajas

9:30 pm - 2:50 pmEAS San Sebastián-PHL Philadelphia

46h 20m2 stops Madrid Barajas London Heathrow

$894Iberia

Thu, Nov 26 - Thu, Dec 3

4:25 pm - 1:00 pmPHL Philadelphia-EAS San Sebastián

14h 35m2 stops Boston Logan Intl Madrid Barajas

9:20 am - 3:35 pmEAS San Sebastián-PHL Philadelphia

12h 15m1 stop Madrid Barajas

$927Iberia

Thu, Nov 26 - Thu, Dec 3

4:25 pm - 1:00 pmPHL Philadelphia-EAS San Sebastián

14h 35m2 stops Boston Logan Intl Madrid Barajas

9:20 am - 9:00 pmEAS San Sebastián-PHL Philadelphia

17h 40m2 stops Madrid Barajas Chicago O'Hare Intl

$937American Airlines

Thu, Nov 26 - Thu, Dec 3

7:50 pm - 8:40 amPHL Philadelphia-EAS San Sebastián

30h 50m1 stop Madrid Barajas

9:30 pm - 3:35 pmEAS San Sebastián-PHL Philadelphia

24h 05m1 stop Madrid Barajas

$942Iberia

Wed, Mar 17 - Sat, Mar 20

7:35 pm - 8:40 amPHL Philadelphia-EAS San Sebastián

32h 05m2 stops London Heathrow Madrid Barajas

9:30 pm - 4:50 pmEAS San Sebastián-PHL Philadelphia

24h 20m1 stop Madrid Barajas

$1,035Iberia

Wed, Mar 17 - Sat, Mar 20

7:25 pm - 8:40 amPHL Philadelphia-EAS San Sebastián

32h 15m1 stop Madrid Barajas

9:30 pm - 4:50 pmEAS San Sebastián-PHL Philadelphia

24h 20m1 stop Madrid Barajas

$1,202Iberia

Thu, Nov 26 - Thu, Dec 3

9:15 am - 1:35 pmPHL Philadelphia-EAS San Sebastián

22h 20m3 stops Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl Barcelona-El Prat

2:10 pm - 12:44 amEAS San Sebastián-PHL Philadelphia

40h 34m3 stops Barcelona-El Prat Lisbon Humberto Delgado Chicago O'Hare Intl

$1,452Multiple Airlines

Useful Info

Cheapest flight	$384

Flight from Philadelphia to San Sebastian

How does KAYAK find such low prices on flights from Pennsylvania to San Sebastian?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Pennsylvania to San Sebastian.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Pennsylvania to San Sebastian?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Sebastian from Pennsylvania is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Pennsylvania to San Sebastian?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Sebastian with an airline and back to Pennsylvania with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Pennsylvania to San Sebastian?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Sebastian from Pennsylvania up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.