| HYG | PAHY | Hydaburg Seaplane Base | Хайдаберг | |
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| HYI | KHYI | San Marcos Municipal Airport | - | |
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| HYW | KHYW | Conway Horry County Airport | - | |
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| I16 | KI16 | Kee Field | - | |
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| ICR | KICR | Winner Rgnl | - | |
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| IDG | KIDG | Ida Grove Muni | Айда Гров | |
|
| IDL | KIDL | Indianola Municipal Airport | - | |
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| IFA | KIFA | Iowa Falls Muni | Айова Фолс | |
|
| IGQ | KIGQ | Lansing Municipal Airport | - | |
|
| IGX | KIGX | Horace Williams Airport | - | |
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| IJD | KIJD | Windham Airport | - | |
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| IJX | KIJX | Jacksonville Muni | Джексонвилл | |
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| IKV | KIKV | Ankeny Regional Airport | - | |
|
| IOB | KIOB | Mount Sterling Montgomery County Airport | - | |
|
| IZG | KIZG | Eastern Slopes Regional Airport | - | |
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| JES | KJES | Jesup Wayne County Airport | - | |
|
| JGG | KJGG | Williamsburg Jamestown Airport | - | |
|
| JKA | KJKA | Jack Edwards Airport | - | |
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| JLA | JLA | Quartz Creek | Купер Лодж | |
|
| JRA | KJRA | West 30th St | - | |
|
| JSV | KJSV | Sallisaw Municipal Airport | - | |
|
| JYL | KJYL | Plantation Airpark | - | |
|
| JYO | KJYO | Leesburg Executive Airport | - | |
|
| JYR | KJYR | York Muni | - | |
|
| JZI | KJZI | Charleston Executive Airport | - | |
|
| JZP | KJZP | Pickens County Airport | - | |
|
| K83 | KK83 | Sabetha Municipal Airport | - | |
|
| KCL | KCL | Chignik Lagoon | Чигник | |
|
| KDK | PAKD | Kodiak Muni | - | |
|
| KEK | KEK | Ekwok | Эквок | |
|
| KGX | PAGX | Grayling | Грейлинг | |
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| KIB | KIB | Ivanof Bay | Айваноф Бэй | |
|
| KIC | KKIC | Mesa Del Rey | Кинг Сити | |
|
| KKU | KKU | Ekuk | Екук | |
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| KNB | KKNB | Kanab Muni | Канаб | |
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| KQA | KQA | Akutan Seaplane Base | Акутан | |
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| KWK | PAGG | Kwigillingok Airport | Квигиллингок | |
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| KWP | KWP | West Point Village | Вест Поинт | |
|
| KXA | KXA | Kasaan | Касан | |
|
| LCI | KLCI | Laconia Muni | Лакония | |
|
| LHD | PALH | Lake Hood Seaplane Base | - | |
|
| LHM | KLHM | Lincoln Regional Karl Harder Field | - | |
|
| LHX | KLHX | La Junta Municipal Airport | - | |
|
| LLQ | KLLQ | Monticello Municipal Ellis Field | - | |
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| LMS | KLMS | Louisville Winston County | Луисвил | |
|
| LPR | KLPR | Lorain County Regional Airport | - | |
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| LQR | KLQR | Larned Pawnee County Airport | - | |
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| LRJ | KLRJ | Le Mars Muni | Ле Марс | |
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| LRO | KLRO | Mt Pleasant Regional-Faison field | Латроп | |
|
| LVL | KLVL | Lawrenceville Muni | Лоренсевилл | |
|