| ERV | KERV | Kerrville Airport | Kerrville | |
| MEI | KMEI | Key Field | Meridian | |
| KVC | - | King Cove Airport | King Cove | |
| AKN | PAKN | King Salmon Airport | King Salmon | |
| IGM | KIGM | Kingman Airport | Kingman | |
| ISO | KISO | Kinston Regional Jetport | Kinston | |
| KPN | PAKI | Kipnuk Sea Plane Base | Kipnuk | |
| IRK | KIRK | Kirksville Municipal Airport | Kirksville | |
| ISM | KISM | Kissimmee Gateway Airport | Kissimmee | |
| KKB | - | Kitui Bay Sea Plane Base | Kitui Bay | |
| KVL | - | Kivalina Airport | Kivalina | |
| KLW | PAKW | Klawock Airport | Klawock | |
| - | - | Knox County Airport | Mt Vernon | |
| RKD | KRKD | Knox County Regional Airport | Rockland | |
| OBU | - | Kobuk/Wien Airport | Kobuk | |
| KNK | - | Kokhanok Airport | Kokhanok | |
| OKK | KOKK | Kokomo Municipal Airport | Kokomo | |
| KGK | PAJZ | Koliganek Airport | Koliganek | |
| KKH | PADY | Kongiganak Airport | Kongiganak | |
| KOT | - | Kotlik Airport | Kotlik | |
| KKA | PAKK | Koyuk Airport | Koyuk | |
| KYU | - | Koyukuk Airport | Koyukuk | |
| KWT | - | Kwethluk Airport | Kwethluk | |
| KWK | - | Kwigillingok Airport | Kwigillingok | |
| KWN | PAQH | Kwinhagak Airport | Quinhagak | |
| LSE | KLSE | La Crosse Regional Airport | La Crosse | |
| LGD | KLGD | La Grande/Union County Airport | La Grande | |
| LCI | KLCI | Laconia Municipal Airport | Laconia | |
| LFT | KLFT | Lafayette Regional Airport | Lafayette | |
| MFD | KMFD | Lahm Municipal Airport | Mansfield | |
| LCH | KLCH | Lake Charles Regional Airport | Lake Charles | |
| LCQ | KLCQ | Lake City Gateway Airport | Lake City | |
| LKV | KLKV | Lake County Airport | Lakeview | |
| HII | KHII | Lake Havasu City Municipal Airport | Lake Havasu City | |
| LMA | - | Lake Minchumina Airport | Lake Minchumina | |
| LKP | KLKP | Lake Placid Airport | Lake Placid | |
| TVL | KTVL | Lake Tahoe Airport | South Lake Tahoe | |
| LKE | - | Lake Union Sea Plane Base | Seattle | |
| NEW | KNEW | Lakefront Airport | New Orleans | |
| LAL | KLAL | Lakeland Municipal Airport | Lakeland | |
| LAA | KLAA | Lamar Municipal Airport | Lamar | |
| LNY | PHNY | Lanai Airport | Lanai | |
| LNS | KLNS | Lancaster Airport | Lancaster | |
| LFI | KLFI | Langley Air Force Base | Hampton | |
| LRD | KLRD | Laredo International Airport | Laredo | |
| KLN | - | Larsen Sea Plane Base | Larsen Bay | |
| LRU | KLRU | Las Cruces Municipal Airport | Las Cruces | |
| LVS | KLVS | Las Vegas Airport | Las Vegas | |
| DLF | KDLF | Laughlin Air Force Base | Del Rio | |
| IFP | KIFP | Laughlin Bullhead International Airport | Bullhead City | |