When do Boston Celtics Tickets go on Sale? 1.6k Views 0shares Facebook Twitter Email Pinterest All NBA tickets will go on sale at the same time. This day varies but it usually sometime in August when the schedule is announced. The secondary market will start to fill up after that.0shares Facebook Twitter Email Pinterest Written by Ticket ManI've been in the ticket industry for many years. I want to share with you the best ways to get the best prices for the best seats.