| CZT | KCZT | Carrizo Springs Airport | Carrizo Springs | |
| - | - | Carrizozo Municipal | Carrizozo | |
| - | - | Carroll | De Soto | |
| - | KJKL | Carroll | Jackson | |
| CIN | KCIN | Carroll Airport | Carroll | |
| - | - | Carroll Co | Berryville | |
| - | KHZD | Carroll Co | Huntingdon | |
| - | KDMW | Carroll Co Regional/Poage | Westminster | |
| - | KTSO | Carroll Co-Tolson | Carrollton | |
| CSN | KCXP | Carson City Airport | Carson City | |
| - | - | Carter | Pulaski | |
| - | - | Carter Memorial | Luling | |
| - | KVPC | Cartersville | Cartersville | |
| - | - | Carthage | Carthage | |
| - | - | Carthage-Leake Co | Carthage | |
| - | - | Caruthersville Memorial | Caruthersville | |
| - | - | Casa De Aero Park | Hampshire | |
| CGZ | KCGZ | Casa Grande Municipal Airport | Casa Grande | |
| - | - | Cascabel | Tucson | |
| - | - | Cascade | Cascade | |
| CZK | KCZK | Cascade Locks State Airport | Cascade Locks | |
| ATU | - | Casco Cove Airport | Attu Island | |
| PVZ | KPVZ | Casement Airport | Painesville | |
| - | - | Casey Municipal | Casey | |
| - | - | Cashmere-Dryden | Cashmere | |
| - | - | Casselton Regional | Casselton | |
| - | - | Cassville Municipal | Cassville | |
| - | - | Cassville Municipal | Cassville | |
| MER | KMER | Castle Air Force Base | Merced | |
| - | - | Castroville Municipal | Castroville | |
| - | - | Caswell | Yanceyville | |
| SPQ | - | Catalina Sea Plane Base | San Pedro | |
| - | - | Causey | Liberty | |
| - | - | Cavalier Municipal | Cavalier | |
| - | - | Cavanaugh Bay | Coolin | |
| - | - | Cawker City | Cawker City | |
| - | - | Cecil Co | Elkton | |
| - | - | Cedar Air Park | Olathe | |
| - | - | Cedar Mills | Gordonville | |
| - | - | Cedars North | Battle Ground | |
| - | - | Cedarville | Cedarville | |
| CWS | - | Center Island Airport | Center Island | |
| - | - | Center Municipal | Center | |
| JOC | - | Centerport Heliport | Santa Ana | |
| - | KTVK | Centerville Municipal | Centerville | |
| GHM | KGHM | Centerville Municipal Airport | Centerville | |
| JDX | - | Central Business District Heliport | Houston | |
| - | - | Central City Municipal | Central City | |
| - | - | Central Co | Iola | |
| - | - | Central Colorado Regional | Buena Vista | |