Flights from Chicago to San Sebastian are found to be more expensive on Thursday. This shouldn't discourage you from searching as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to San Sebastian.
A simple way to save on the total cost of your ticket is to fly from Chicago to San Sebastian in the afternoon. If you’re flexible enough to do this you can expect to save up to 13% on your trip compared to booking a flight in the morning.