| ALASKA | SLE | SALEM, OR MCNARY FLD |
| ALASKA | SLQ | SLEETMUTE |
| ARKANSAS | SLG | SILOAM SPRINGS SMITH FLD |
| CALIFORNIA | SLI | LOS ALAMITOS AAF |
| ILLINOIS | SLO | SALEM-LECKRONE |
| IOWA | SLB | STORM LAKE MUNI |
| KANSAS | SLN | SALINA MUNI |
| MICHIGAN | SLH | CHEBOYGAN CO |
| NEW YORK | SLK | SARANAC LAKE ADIRONDACK RGNL |
| OREGON | SLE_1 | SALEM McNARY FLD |
| TEXAS | SLR | SULPHUR SPRINGS MUNI |
| UTAH | SLC | SALT LAKE CITY INTL |