Tickets on sale at Sixfields on Sunday.
The U's take on the Sky Blues on Sunday, looking to extend their unbeaten away record in the Sky Bet League One.
Northampton Town's Sixfields Stadium hosts the match, which kicks off at 3pm.
Tickets are available from the Weston Homes Community Stadium Ticket Office until 4 o'clock on Friday afternoon.
Seniors (60+) £11
NB: On the day sales are available at Sixfields on Sunday.