Pompey have sold their full allocation of tickets for the league visit to Crawley.
It means that Paul Cook's side will be backed by 2,300 supporters at Broadfield Stadium on Saturday, January 21 (3pm kick-off).
Supporters who have bought concession tickets are advised to bring proof of age identification with them to game.
Official coach travel is priced £18 for adults and £12 for children, and can be booked online here
or by calling Lucketts Travel on 01329 237000.