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