Airport 4Y1 is Raether Airport, Howell, Michigan USA
Similar to 4Y1
04A - Frank Sikes Airport, Luverne, Alabama USA04F - De Leon Municipal Airport, De Leon, Texas USA
04G - Lansdowne Airport, Youngstown, Ohio USA
04I - Columbus Southwest Airport, Columbus, Ohio USA
04J - former code for Darlington County Jetport, Darlington, South Carolina USA now UDG
04LS - Louisiana National Guard Heliport, Baton Rouge, Louisiana USA
04M - Calhoun County Airport, Pittsboro, Mississippi USA
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