Advance sales cease Friday
The U's take on the Spirerites at the Proact Stadium on Saturday afternoon, ahead of another trip North on Tuesday for the match at Sheffield United.
All advance purchases made in person at the Weston Homes Community Stadium or on the phone for Chesterfield will cease at 2pm on Friday afternoon.
Tickets will be available on the day at the Proact, from the ticket booth adjacent the turnstiles (cash only).
To get your tickets before you head up for the game, phone 0845 437 9089 or pop to the stadium between 10am and 2pm on Friday.