| - | - | Schuy-Rush | Rushville | |
| - | KZER | Schuylkill Co | Pottsville | |
| - | - | Scobey Border Stn/East Poplar* | Scobey | |
| - | - | Scotia Municipal | Scotia | |
| - | - | Scott | Parsons | |
| - | - | Scott | Oroville | |
| - | - | Scott | Mineral Wells | |
| - | - | Scott | Tallulah | |
| - | KTQK | Scott City Municipal | Scott City | |
| - | - | Scott Field | Mangum | |
| - | - | Scott Municipal | West Union | |
| - | - | Scott Valley | Ft Jones | |
| - | - | Scottsboro Mun-Word | Scottsboro | |
| - | - | Scottsburg | Scottsburg | |
| SCR | - | Scranton Municipal Airport | Scranton | |
| SCB | KSCB | Scribner State Airport | Scribner | |
| - | - | Seagraves | Seagraves | |
| - | - | Seamans | Factoryville | |
| - | - | Searchlight | Searchlight | |
| SRC | KSRC | Searcy Airport | Searcy | |
| - | - | Searcy Co | Marshall | |
| OGA | KOGA | Searle Field | Ogallala | |
| - | - | Seaside Municipal | Seaside | |
| - | - | Sebastian Municipal | Sebastian | |
| - | - | Sebewaing | Sebewaing | |
| SEF | KSEF | Sebring Air Terminal | Sebring | |
| DMO | KDMO | Sedalia Airport | Sedalia | |
| - | - | Sedan City | Sedan | |
| - | - | Seeley Lake | Seeley Lake | |
| - | - | Seiling | Seiling | |
| - | - | Sekiu | Sekiu | |
| SES | - | Selfield Airport | Selma | |
| MMS | KMMS | Selfs Airport | Marks | |
| - | - | Seligman | Seligman | |
| - | - | Sells | Sells | |
| - | - | Selma | Selma | |
| - | - | Seminole Municipal | Seminole | |
| - | KSSN | Seneca Aaf | Romulus | |
| - | - | Seneca Co | Tiffin | |
| - | - | Seneca Municipal | Seneca | |
| SQV | - | Sequim Valley Airport | Sequim | |
| - | - | Sequoia | Visalia | |
| - | - | Seven Springs | Seven Springs Borough | |
| SWD | PAWD | Seward Airport | Seward | |
| - | KSWT | Seward Municipal | Seward | |
| GSB | KGSB | Seymour Johnson Air Force Base | Goldsboro | |
| - | - | Seymour Municipal | Seymour | |
| - | - | Shades State Park | Waveland | |
| - | - | Shady Acres | Spanaway | |
| - | - | Shamrock | Brooklyn | |