Pompey have sold their full allocation of tickets for their League One visit to Charlton.
It means that Kenny Jackett's side will be backed by 3,000 fans at The Valley on Saturday, March 9 (5.30pm 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.
Fans without a ticket will be able to watch the match live on Sky Sports Football.