What season did haruhi and kyon kiss?

Answer 1

For whatever reason, Haruhi "chose" Kyon. This is first said by Yuki, then restated by Mikuru, and Itsuki as well. She often relies on and trusts Kyon with anything. Kyon is the only person whom she has been open with, and when she briefly created a "new world", he was the only person she had brought over from the "old world". These are all made evident in the fourth novelThe Vanishment of Haruhi Suzumiya, where she remained at Kyon's side for the three days when he was in a coma due to a small accident. It's quite complicated, really. But in short, they get everything pretty much cleared up at the end. However, Haruhi has always liked Kyon from the start. That's why [in the anime], he was the only person Haruhi wanted to take with to the "new world" also it may be when kyon draws the symbol on the school field of haruhi after traveling back in time with mikuru.

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Answer 2

The first.

It happens when Haruhi creates that new world with just Kyon and herself in it. Kyon gets everything to return to normal by kissing Haruhi.