- Cloud Nine AirportIdent: ND98Serves: Lincoln
- Cloud Nine West AirportIdent: 46MIServes: Webberville
- Cloudmont AirparkIdent: AL09Serves: Mentone
- Clover Fields AirportIdent: OA19Serves: North Canton
- Clover Knoll AirportIdent: II07Serves: Cloverdale
- Clover Valley AirportIdent: 3WI5Serves: Whitewater
- Cloverdale Municipal AirportIdent: KO60Serves: Cloverdale
- Cloverleaf Ranch AirportIdent: 15LLServes: Tiskilwa
- Cloverleaf-East Bemidji AirportIdent: MY54Serves: Bemidji
- Cluck Ranch AirportIdent: K2E3Serves: Gruver
- Clum AirportIdent: 8OI5Serves: Thornville
- Clute's Hilltop AirportIdent: 69NCServes: Forest City
- Clyde Valley AirportIdent: 3NC0Serves: Morganton
- Cmelak FieldIdent: MA18Serves: Sheffield
- Coal Creek AirportIdent: L20Serves: Yukon Charley Rivers
- Coal FieldIdent: US-0199Serves: Lexington
- Coates AirportIdent: 79GAServes: Fort Gaines
- Coca Cola AirportIdent: OG49Serves: Corvalis
- Cochise College AirportIdent: KP03Serves: Douglas
- Cochise County AirportIdent: KP33Serves: Willcox
- Cochran AirportIdent: 0NK6Serves: Marathon
- Cochran AirportIdent: 1KS1Serves: Richmond
- Cochran AirportIdent: K48AServes: Cochran
- Cochran County AirportIdent: KF85Serves: Morton
- Cockfield AerodromeIdent: SC60Serves: Scranton
- Coffey County AirportIdent: KUKLServes: Burlington
- Coffeyville Municipal AirportIdent: KCFVServes: Coffeyville
- Coffman AirportIdent: 09KSServes: Wellsville
- Cokeville Municipal AirportIdent: KU06Serves: Cokeville
- Colberg AirportIdent: 5AK6Serves: Palmer
- Colby AirportIdent: US-8413Serves: Winchester
- Colby FieldIdent: OK24Serves: Lone Grove
- Cold Meadows US Forest Service AirportIdent: KU81Serves: Warren
- Cold Water AirportIdent: UT89Serves: Mendon
- Coldbrook FieldIdent: US-6788Serves: Climax
- Coldfoot AirportIdent: PACXServes: Coldfoot
- Cole Farm AirportIdent: 06NHServes: Kensington
- Cole Landing Area AirportIdent: 2OK7Serves: Newcastle
- Cole Memorial AirportIdent: 57NEServes: Merriman
- Coleman AirportIdent: WS28Serves: Portage
- Coleman Cattle Company Nr 1 AirportIdent: 75TAServes: Ackerly
- Coleman FieldIdent: GA95Serves: Fayetteville
- Coleman Municipal AirportIdent: KCOMServes: Coleman
- Coles County Memorial AirportIdent: KMTOServes: Mattoon
- Colle FieldIdent: 34MSServes: Gautier
- College Park AirportIdent: KCGSServes: College Park
- Collegedale Municipal AirportIdent: KFGUServes: Apison
- Collier AirparkIdent: 2AL1Serves: Magnolia Springs
- Collier/Pine Barren AirparkIdent: FD89Serves: Century
- Collins FieldIdent: US-52NKServes: Sylvan Beach
- Collins-Flege AirparkIdent: 77OHServes: Mason
- Colonel James Jabara AirportIdent: KAAOServes: Wichita
- Colonial Acres AirportIdent: 4LL8Serves: Sycamore
- Colonial Air ParkIdent: 01TNServes: Collierville
- Colorado Air and Space PortIdent: KFTGServes: Denver
- Colorado Antique FieldIdent: 8CO7Serves: Niwot
- Colorado City Municipal AirportIdent: KAZCServes: Colorado City
- Colorado Creek AirportIdent: KCRServes: Colorado Creek
- Colorado Plains Regional AirportIdent: KAKOServes: Akron
- Colstrip AirportIdent: KM46Serves: Colstrip