If you want to catch a,bus,from niagra falls usa,side you can catch a bus 2 dollars,exact money fro 3rd /niagra st number 40a . Takes 45 mins to buffalo. Then catch the bus number 24 from the same stop to the airport. This is 2 dollars again and 45 mins to the airport . Easy. Only ten minute wait. Between buses. Taxi is,60 / 70 dollars.