My wife got a warrant on me for stalking after I left the country. Now I am trying to come back to USA. Could I be arrested, if I fly in ? Instead,if I cross the Canadian border and come to USA in Buffalo, NY,could I be stopped?

Hello r:

When you go through customs, they check with their computer... Now, I don't know what's on it, but if it DOESN'T have your warrants listed, they might as well be playing video games.

excon

You can be caught anywhere at the border. They will hold and detain you. At that point the agency with the warrant will decide if they want to pay to have you brought in. If they will not pay, you will be released.
Best bet, come into the country as far from the area where the warrant is. If the warrant is in NY come in to the US in California or somewhere.