Yes, you can use your ticket only on the date you requested. If you want to change the date there is no problem up to the date of travel however seats must be available. We may charge you a change fee anywhere from 5 % to 25% of your booking fee, depending on the time of year. If you purchased with another travel partner your charge will appear on your statement as a change fee. You are welcome to buy your ticket on the day if that is your preference, but please note that discounts online are not available on same-day purchases. Last minute sales are often available but guaranteed seats are not.