It’s typically around 80-90 minutes if you’re a headliner/larger venue and ticket prices are more than $20 (£13) w/o fees. With the less expensive tickets or smaller acts/venues, sets are usually 45-60 minutes.
We got around 70 minutes in Madison last fall when Dino came. It would have been longer, but Murph fell ill during the show. The Cleveland show a few days later lasted for almost 90 minutes or so. That show was a damn scorcher. That show should have been officially released by the band. I mean damn (I’m digressing, sorry).