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