If I have a straight, what are the odds someone has a flush?

If I have a straight, and there are three harts on the board, what are the odds someone has a flush. Lets say there is only one other person in that poker game.

To determine if they have a flush, we need more info on how the hand played out.
The odds to flop a flush are 118-1. That is less than 1 percent.

I want to know if there are three harts on the board, not three harts on the flop.

Poker Hand Ranking Probability

I found this image online and its helped me by bringing me back down to reality where it concerns the actual Probability Of Hitting my Outs, Flushes, Straights... ect Oh this is Five Card...

PokerSki said:

If I have a straight, and there are three harts on the board, what are the odds someone has a flush. Lets say there is only one other person in that poker game.

Click to expand...

In poker terms chances of hitting a flush is small.

Chance that your opponent is dealt 2 suited cards 25%
Odds of these two cards making a flush by the river is around 6%

Depends ultimately though not on the %age chance but opponent behavior. If villain is a rock, you have to have solid rock balls to call huge bet sizes unless you have some other tell.. If villain is a lose goose, its an easy call.