| ALASKA | RDM | REDMOND, OR ROBERTS FLD |
| ALASKA | RDV | RED DEVIL |
| CALIFORNIA | RDD | REDDING MUNI |
| IOWA | RDK | RED OAK MUNI |
| NORTH CAROLINA | RDU | RALEIGH-DURHAM INTL |
| NORTH DAKOTA | RDR | GRAND FORKS AFB |
| OREGON | RDM_1 | REDMOND ROBERTS FLD |
| PENNSYLVANIA | RDG | READING RGNL-CARL A SPAATZ FLD |