| ALABAMA | ALX | ALEXANDER CITY THOMAS C RUSSELL FLD |
| ALASKA | ALZ | ALITAK SEAPLANE |
| COLORADO | ALS | ALAMOSA SAN LUIS VALLEY RGNL-BERGMAN FLD |
| ILLINOIS | ALN | ALTON-ST LOUIS ST LOUIS RGNL |
| IOWA | ALO | WATERLOO RGNL |
| MISSOURI | ALN_1 | ST LOUIS (ALTON, IL) ST LOUIS RGNL |
| NEW MEXICO | ALM | ALAMOGORDO-WHITE SANDS RGNL |
| NEW YORK | ALB | ALBANY INTL |
| TEXAS | ALI | ALICE INTL |
| WASHINGTON | ALW | WALLA WALLA RGNL |