| IATA | ICAO | Airport name | City | Delays |
|---|---|---|---|---|
| - | - | Kingdon | Lodi | |
| - | - | Kingfisher | Kingfisher | |
| - | - | Kingman Municipal | Kingman | |
| - | KLNL | Kings Land O'Lakes | Land O'Lakes | |
| - | - | Kingston-Ulster | Kingston | |
| - | - | Kinsley Municipal | Kinsley | |
| - | - | Kirbyville | Kirbyville | |
| - | - | Kirk Air Base | Lancaster | |
| PGR | KPGR | Kirk Field | Paragould | |
| - | - | Kirkwood | Kirkwood | |
| IRS | KIRS | Kirsch Municipal | Sturgis | |
| - | KITR | Kit Carson Co | Burlington | |
| - | - | Kittie Hill | Leander | |
| - | - | Kittyhawk | Allen | |
| - | - | Kizer | Prescott | |
| KZH | - | Kizhuyak Airport | Kizhuyak | |
| KBK | - | Klagbay Airport | Klagbay | |
| - | KIKG | Kleberg Co | Kingsville | |
| - | - | Kline Kill | Ghent | |
| - | - | Kneeland | Eureka | |
| - | - | Knox Airport | Quaker Street | |
| - | KOXV | Knoxville Municipal | Knoxville | |
| - | KDKX | Knoxville-Downtown I | Knoxville | |
| - | - | Kobelt | Wallkill | |
| - | - | Koch | Poseyville | |
| WDY | - | Kodiak FSS Airport | Kodiak | |
| KDK | - | Kodiak Municipal Airport | Kodiak | |
| - | - | Kokhanok | Kokhanok | |
| - | - | Koons | Salem | |
| - | - | Kooskia Municipal | Kooskia | |
| - | - | Krassel Usfs | Mc Call | |
| - | - | Kroelinger | Vineland | |
| KUW | - | Kugururok River Airport | Kugururok River | |
| LKK | - | Kulik Lake Airport | Kulik Lake | |
| UUK | - | Kuparuk Airport | Kuparuk | |
| - | - | Kure | Kure I | |
| - | - | Kutztown | Kutztown | |
| - | - | La Belle Municipal | La Belle | |
| - | KLHX | La Junta Municipal | La Junta | |
| - | - | La Moure Rott Municipal | La Moure | |
| - | - | La Porte Municipal Airport | La Porte | |
| WLB | - | Labouchere Bay Airport | Labouchere Bay | |
| - | - | Lackey Aviation | Wharton | |
| - | - | Lafayette Municipal | Lafayette | |
| - | - | Lago Vista-Allen | Lago Vista | |
| LGF | KLGF | Laguna Army Air Field | Yuma | |
| - | - | Laidlaw Corrals | Kimama | |
| - | - | Lake Andes Municipal | Lake Andes | |
| - | - | Lake Anna | Bumpass | |
| - | - | Lake Barkley State Park | Cadiz |