Pompey have sold their full allocation of tickets for the midweek visit to Luton.
It means that Kenny Jackett's side will be backed by 1,000 fans at Kenilworth Road on Tuesday, January 29 (7.45pm kick-off).
Supporters who have bought concession tickets are advised to bring proof of age identification with them to the game.
Official coach travel can be booked online here or by calling Lucketts Travel on 01329 237000.
Tickets are currently on sale for Pompey's remaining home games this season, including the FA Cup clash with QPR. Click here to buy online.