| FLORIDA | ISM | ORLANDO KISSIMMEE GATEWAY |
| IOWA | ISB | SIBLEY MUNI |
| MICHIGAN | ISQ | MANISTIQUE SCHOOLCRAFT CO |
| NEW YORK | ISP | ISLIP LONG ISLAND MAC ARTHUR |
| NORTH CAROLINA | ISO | KINSTON RGNL JETPORT AT STALLINGS FLD |
| NORTH DAKOTA | ISN | WILLISTON SLOULIN FLD INTL |
| OHIO | ISZ | CINCINNATI-BLUE ASH |
| WISCONSIN | ISW | WISCONSIN RAPIDS ALEXANDER FLD SOUTH WOOD CO |