The best place to get tickets for "The Tonight Show Starring Jimmy Fallon" is Tonightshowtix.com, a site operated by NBC; tickets are complimentary and not for sale. Tickets are also available at NBC Studios, though infrequently and only under specific conditions.
The network generally releases tickets for "The Tonight Show Starring Jimmy Fallon" month by month, with tickets for specific dates available until the date in question sells out. Standby tickets are also available at NBC Studios and given out to potential audience members in a standby line in the event that people who purchased tickets do not attend the show. The show also offers tickets to watch Fallon practice his monologue and sketches from the show prior to the taping, though these tickets are in very limited supply.