| ALASKA | ONP | NEWPORT MUNI |
| CALIFORNIA | ONT | ONTARIO INTL |
| MICHIGAN | ONZ | DETROIT-GROSSE ILE GROSSE ILE MUNI |
| MINNESOTA | ONA | WINONA MUNI-MAX CONRAD FLD |
| NEBRASKA | ONL | THE ONEILL MUNI-JOHN L BAKER FLD |
| NEW MEXICO | ONM | SOCORRO MUNI |
| NORTH CAROLINA | ONX | CURRITUCK CO |
| OREGON | ONO | ONTARIO MUNI |
| OREGON | ONP_1 | NEWPORT MUNI |
| TEXAS | ONY | OLNEY MUNI |