Commercial Airports in Ohio

Akron Akron Canton Regional Arpt CAK

Cincinnati Cincinnati No Kentucky Intl Arpt CVG

Cleveland Hopkins Intl Arpt CLE

Columbus Port Columbus Intl Arpt CMH

Dayton Dayton International Airport DAY

Toledo Toledo Express Arpt TOL

Youngstown Youngstown Municipal YNG

I think Toledo is the closest to the park which is in Findlay, OH. According to yahoo maps it's about an hour away.