No.
You can find the stable boy that waits around and is too scared to talk to princesses, though.

Prince Charmings don't really use online dating sites.

Charming people tend to go out and charm people, and are invited by charmed people to go out and enjoy life and do things...because they're charming.

You don't really read a lot of profiles or forums that are all "Hi! I'm really charming, I have absolutely no problems in life, no problem meeting people at all, have lots of friends, my life completely in order, with a lot of eclectic hobbies making me able to talk about anything with anyone, with lots and lots of time to focus solely on getting someone to fall in love with me."

...There's a reason for that.