The chance to flop a flush with 2 suited cards is .84% or 118/1. It doesnt mean this is the chance someone flopped a flush on a suited flop though. If there are more people in the pot there is a better chance someone did flop a flush and im sure in a limped pot there is a higher chance because people like to limp with suited connecting cards. In a raised pot the suited hands can be narrowed down more to like AKs AQs and maybe AJs or KQs