Hand
Payout
Probability of Landing
Flush
5:1
0.059
Straight
10:1
0.031
Three of a Kind
30:1
0.005
Straight Flush
40:1
0.002
As a general guideline, side bets in blackjack have high house edges and should be avoided. But if you insist on trying your luck, at least stick to the side bets that have the lowest house edge. Better yet, learn a counting system that is specific to the side bet and that can give you an edge.