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