| SVN | KSVN | Hunter Air Force Base | Savannah | |
| HSL | PAHS | Huslia Airport | Huslia | |
| HYG | - | Hydaburg Sea Plane Base | Hydaburg | |
| WHD | - | Hyder Sea Plane Base | Hyder | |
| IDA | KIDA | Idaho Falls Regional Airport | Idaho Falls | |
| IGG | - | Igiugig Airport | Igiugig | |
| BDR | KBDR | Igor I. Sikorsky Memorial Airport | Bridgeport | |
| ILI | PAIL | Iliamna Airport | Iliamna | |
| IPL | KIPL | Imperial County Airport | Imperial | |
| IDI | KIDI | Indiana County Airport | Indiana | |
| - | KTYQ | Indianapolis Executive Airport | Indianapolis | |
| - | KUMP | Indianapolis Metropolitan Airport | Indianapolis | |
| HSP | KHSP | Ingalls Field | Hot Springs | |
| - | KMRJ | Iowa County Airport | Mineral Point | |
| ITH | KITH | Ithaca Tompkins Regional Airport | Ithaca | |
| GUF | KJKA | Jack Edwards Airport | Gulf Shores | |
| JXN | KJXN | Jackson County Airport | Jackson | |
| JAC | KJAC | Jackson Hole Airport | Jackson | |
| CRG | KCRG | Jacksonville Executive at Craig Airport | Jacksonville | |
| TRM | KTRM | Jacqueline Cochran Regional Airport | Thermal | |
| JHW | KJHW | Jamestown Airport | Jamestown | |
| JMS | KJMS | Jamestown Airport | Jamestown | |
| JEF | KJEF | Jefferson City Memorial Airport | Jefferson City | |
| BPT | KBPT | Jefferson County Airport | Beaumont | |
| DUJ | KDUJ | Jefferson County Airport | Dubois | |
| TWD | - | Jefferson County International Airport | Port Townsend | |
| - | KJES | Jesup-Wayne County Airport | Jesup | |
| - | KJWN | John C. Tune Airport | Nashville | |
| OJC | KOJC | Johnson Executive Airport | Kansas City | |
| JBR | KJBR | Jonesboro Airport | Jonesboro | |
| JLN | KJLN | Joplin Airport | Joplin | |
| KAE | - | Kake Sea Plane Base | Kake | |
| JRF | PHJR | Kalaeloa Airport | Kapolei | |
| AZO | KAZO | Kalamazoo Battle Creek International Airport | Kalamazoo | |
| LUP | PHLU | Kalaupapa Airport | Kalaupapa | |
| KLG | - | Kalskag Municipal Airport | Kalskag | |
| KAL | - | Kaltag Airport | Kaltag | |
| MUE | PHMU | Kamuela Airport | Kamuela | |
| NGF | PHNG | Kaneohe Bay Marine Corps Air Station | Mokapu | |
| JHM | PHJH | Kapalua Airport | Kapalua | |
| KYK | PAKY | Karluk Airport | Karluk | |
| KKL | - | Karluk Lake Sea Plane Base | Karluk Lake | |
| KXA | - | Kasaan Sea Plane Base | Kasaan | |
| KUK | - | Kasigluk Airport | Kasigluk | |
| EAR | KEAR | Kearney Regional Airport | Kearney | |
| SKF | KSKF | Kelly Field Annex | San Antonio | |
| TMB | KTMB | Kendall-Tamiami Executive Airport | Miami | |
| KEH | - | Kenmore Air Harbor Airport | Kenmore Air Harbor | |
| ENW | KENW | Kenosha Regional Airport | Kenosha | |
| IYK | KIYK | Kern County Airport | Inyokern | |