Different winning combination have different chances of coming out. Only one of 40,000 combinations can be a Royal Flush. The chance of getting Straight Flush is 10,000:1. Only one of 423 combinations can be a Four of a Kind. 86:1 is a chance of getting a Full House. The chance of getting Flush is 93:1. 85:1 is a chance of getting a Straight. Only one of 13 combinations can be a Three of a Kind. 8:1 is a chance of getting a Two Pairs. The chance of getting High Pair is 5:1. American Poker Flush.