Around 5,000 set to descend on north west.
Sunderland will be backed by another bumper away following this weekend with the trip to Wigan now sold out.
A small number of remaining seats were snapped up on Tuesday with the club's allocation of 4,852 seats now completely gone.
The sell-out means the Black Cats will have taken nearly 10,000 fans across each of their two most recent away games.
Supporters are advised not to travel to the DW Stadium without a valid match ticket.