Can I fly if I have a warrant? How?

Domestic should be fine. You should hire a lawyer to go to court to recall the warrant. A lawyer can do this without you present, so it is less risky for you.

I have had a lot of clients get picked up at the airport that had outstanding warrants, some they didn't even know about. Even if you are flying intrastate, I would imagine it would still show up and you run the risk of being hauled way by the police. I do not think it is a good idea to fly if you have an outstanding warrant.

Where, domestic or international. commercial or private? Actually you best bet is to take care of the warrant. What is it for. Engage and attorney with all of the facts.