The Owls are reminding Season Ticket holders that the online deadline for the Owls v Arsenal clash is Monday at 9.00am.
All seats unsold on Monday will then be released for general sale.
Sales are currently available to Season Ticket holders, Members and Owls Foundation Members.
Prices for the game on Tuesday 27 October are £25 for adults and £15 concessions around the ground.
Supporters are advised that the Ticket Office will be extremely busy on Monday and where possible, online booking is advised.