| Ralph Wien Memorial Airport | Kotzebue | OTZ · PAOT | 2 |
| Range Regional Airport | Hibbing | HIB · KHIB | 2 |
| Rapid City Regional Airport | Rapid City | RAP · KRAP | 2 |
| Redding Municipal Airport | Redding | RDD · KRDD | 2 |
| Rhinelander Oneida County Airport | Rhinelander | RHI · KRHI | 2 |
| Rick Husband Amarillo International Airport | Amarillo | AMA · KAMA | 2 |
| Rickenbacker International Airport | Columbus | LCK · KLCK | 2 |
| Roanoke–Blacksburg Regional Airport | Roanoke | ROA · KROA | 2 |
| Roberts Field | Redmond | RDM · KRDM | 2 |
| Rochester International Airport | Rochester | RST · KRST | 2 |
| Rocky Mountain Metropolitan Airport | Denver | BJC · KBJC | 3 |
| Rogue Valley International-Medford Airport | Medford | MFR · KMFR | 1 |
| Roswell Air Center Airport | Roswell | ROW · KROW | 2 |
| Ruby Airport | Ruby | RBY · PARY | 1 |
| Rutland - Southern Vermont Regional Airport | Rutland | RUT · KRUT | 2 |
| Saint Cloud Regional Airport | Saint Cloud | STC · KSTC | 2 |
| Salem-Willamette Valley Airport/McNary Field | Salem | SLE · KSLE | 2 |
| Salina Municipal Airport | Salina | SLN · KSLN | 4 |
| Salisbury Ocean City Wicomico Regional Airport | Salisbury | SBY · KSBY | 2 |
| San Angelo Regional Mathis Field | San Angelo | SJT · KSJT | 3 |
| San Carlos Airport | San Carlos | SQL · KSQL | 1 |
| San Luis County Regional Airport | San Luis Obispo | SBP · KSBP | 2 |
| San Luis Valley Regional Airport/Bergman Field | Alamosa | ALS · KALS | 1 |
| Sand Point Airport | Sand Point | SDP · PASD | 1 |
| Santa Barbara Municipal Airport | Santa Barbara | SBA · KSBA | 3 |
| Santa Fe Municipal Airport | Santa Fe | SAF · KSAF | 3 |
| Santa Maria Public Airport Captain G Allan Hancock Field | Santa Maria | SMX · KSMX | 2 |
| Savoonga Airport | Savoonga | SVA · PASA | 1 |
| Scott AFB/Midamerica Airport | Belleville | BLV · KBLV | 2 |
| Seattle Paine Field International Airport | Everett | PAE · KPAE | 2 |
| Shenandoah Valley Regional Airport | Weyers Cave | SHD · KSHD | 1 |
| Sheridan County Airport | Sheridan | SHR · KSHR | 2 |
| Show Low Regional Airport | Show Low | SOW · KSOW | 2 |
| Shreveport Regional Airport | Shreveport | SHV · KSHV | 2 |
| Sidney - Richland Regional Airport | Sidney | SDY · KSDY | 2 |
| Sioux Falls Regional Airport | Sioux Falls | FSD · KFSD | 3 |
| Sioux Gateway Airport / Brigadier General Bud Day Field | Sioux City | SUX · KSUX | 2 |
| Sitka Rocky Gutierrez Airport | Sitka | SIT · PASI | 1 |
| South Arkansas Regional Airport at Goodwin Field | El Dorado | ELD · KELD | 1 |
| South Bend International Airport | South Bend | SBN · KSBN | 3 |
| Southeast Iowa Regional Airport | Burlington | BRL · KBRL | 2 |
| Southwest Georgia Regional Airport | Albany | ABY · KABY | 2 |
| Southwest Oregon Regional Airport | North Bend | OTH · KOTH | 2 |
| Southwest Wyoming Regional Airport | Rock Springs | RKS · KRKS | 2 |
| Springfield Branson National Airport | Springfield | SGF · KSGF | 2 |
| St George Airport | St George | STG · PAPB | 1 |
| St George Regional Airport | St George | SGU · KSGU | 1 |
| St Paul Island Airport | St Paul Island | SNP · PASN | 1 |
| State College Regional Airport | State College | SCE · KUNV | 1 |
| Stillwater Regional Airport | Stillwater | SWO · KSWO | 2 |
| Stockton Metropolitan Airport | Stockton | SCK · KSCK | 2 |
| Tacoma Narrows Airport | Tacoma | TIW · KTIW | 1 |
| Tallahassee International Airport | Tallahassee | TLH · KTLH | 2 |
| Taos Regional Airport | Taos | TSM · KSKX | 1 |
| Telluride Regional Airport | Telluride | TEX · KTEX | 1 |
| Teterboro Airport | Teterboro | TEB · KTEB | 2 |
| Texarkana Regional Airport (Webb Field) | Texarkana | TXK · KTXK | 2 |
| The Eastern Iowa Airport | Cedar Rapids | CID · KCID | 2 |
| Thief River Falls Regional Airport | Thief River Falls | TVF · KTVF | 1 |
| Tom Madsen (Dutch Harbor) Airport | Unalaska | DUT · PADU | 1 |
| Trenton Mercer Airport | Ewing Township | TTN · KTTN | 2 |
| Tri Cities Airport | Pasco | PSC · KPSC | 3 |
| Tri-Cities Regional TN/VA Airport | Blountville | TRI · KTRI | 2 |
| Tri-State Airport / Milton J. Ferguson Field | Huntington | HTS · KHTS | 1 |
| Truckee Tahoe Airport | Truckee | TKF · KTRK | 2 |
| Tupelo Regional Airport | Tupelo | TUP · KTUP | 1 |
| Tweed New Haven Airport | New Haven | HVN · KHVN | 1 |
| Tyler Pounds Regional Airport | Tyler | TYR · KTYR | 3 |
| Unalakleet Airport | Unalakleet | UNK · PAUN | 2 |
| University of Illinois Willard Airport | Savoy | CMI · KCMI | 3 |
| Valdez Pioneer Field | Valdez | VDZ · PAVD | 1 |
| Valdosta Regional Airport | Valdosta | VLD · KVLD | 2 |
| Valley International Airport | Harlingen | HRL · KHRL | 3 |
| Vernal Regional Airport | Vernal | VEL · KVEL | 1 |
| Vero Beach Regional Airport | Vero Beach | VRB · KVRB | 3 |
| Veterans Airport of Southern Illinois | Marion | MWA · KMWA | 2 |
| Victoria Regional Airport | Victoria | VCT · KVCT | 2 |
| Waco Regional Airport | Waco | ACT · KACT | 2 |
| Waimea Kohala Airport | Waimea (Kamuela) | MUE · PHMU | 1 |
| Wainwright Airport | Wainwright | AIN · PAWI | 1 |
| Walla Walla Regional Airport | Walla Walla | ALW · KALW | 1 |
| Waterloo Regional Airport | Waterloo | ALO · KALO | 2 |
| Watertown International Airport | Watertown | ART · KART | 2 |
| Watertown Regional Airport | Watertown | ATY · KATY | 2 |
| Waynesville-St. Robert Regional Airport-Forney Field | Fort Leonard Wood | TBN · KTBN | 1 |
| Westchester County Airport | White Plains | HPN · KHPN | 2 |
| Westerly State Airport | Westerly | WST · KWST | 2 |
| Western Neb. Rgnl/William B. Heilig Airport | Scottsbluff | BFF · KBFF | 2 |
| Wichita Dwight D. Eisenhower National Airport | Wichita | ICT · KICT | 3 |
| Wichita Falls Municipal Airport / Sheppard Air Force Base | Wichita Falls | SPS · KSPS | 4 |
| Wiley Post Will Rogers Memorial Airport | Utqiaġvik | BRW · PABR | 1 |
| Wilkes-Barre/Scranton International Airport | Wilkes-Barre/Scranton | AVP · KAVP | 2 |
| Williamsport Regional Airport | Williamsport | IPT · KIPT | 2 |
| Williston Basin International Airport | Williston | XWA · KXWA | 1 |
| Wilmington Airport | Wilmington | ILG · KILG | 3 |
| Wilmington International Airport | Wilmington | ILM · KILM | 2 |
| Worcester Regional Airport | Worcester | ORH · KORH | 2 |
| Wrangell Airport | Wrangell | WRG · PAWG | 1 |
| Yakima Air Terminal McAllister Field | Yakima | YKM · KYKM | 2 |
| Yakutat Airport | Yakutat | YAK · PAYA | 2 |