Yes cat panting is normal and usually nothing to worry about.
Cats can pant just like dogs do when they've become out of breath due to over exerting themselves by playing, exercising etc.
Also if the cat gets too warm or too hot then the cat can start panting and after they cool down and rest then the panting should stop.
My two cats pant all the time when they run and chase each other or when they get too hot and then after around 30 minutes to an hour they'll stop panting.