| GGE | KGGE | Georgetown County Airport | Georgetown | |
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| SEE | KSEE | Gillespie Field | - | |
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| GDW | KGDW | Gladwin Zettel Memorial Airport | Gladwin | |
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| GLV | PAGL | Golovin Airport | Golovin | |
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| GRM | KCKC | Grand Marais Cook County Airport | Grand Marais | |
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| GPZ | KGPZ | Grand Rapids Itasca Co-Gordon Newstrom field | Grand Rapids | |
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| GNT | KGNT | Grants-Milan Municipal Airport | Grants | |
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| CBE | KCBE | Greater Cumberland Regional Airport | Cumberland | |
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| GXY | KGXY | Greeley–Weld County Airport | Greeley | |
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| GUC | KGUC | Gunnison Crested Butte Regional Airport | Gunnison | |
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| LZU | KLZU | Gwinnett County Briscoe Field | Lawrenceville | |
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| HAF | KHAF | Half Moon Bay Airport | Half Moon | |
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| DUC | KDUC | Halliburton Field | Duncan | |
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| PIM | KPIM | Harris County Airport | Pine Mountain | |
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| PHD | KPHD | Harry Clever Field | New Philadelphia | |
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| HVS | KHVS | Hartsville Regional Airport | Hartsville | |
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| HWD | KHWD | Hayward Executive Airport | Hayward | |
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| HZL | KHZL | Hazleton Municipal Airport | Hazleton | |
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| HKB | PAHV | Healy River Airport | Healy Lake | |
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| HSH | KHND | Henderson Executive Airport | - | |
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| TMA | KTMA | Henry Tift Myers Airport | Tifton | |
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| INJ | KINJ | Hillsboro Municipal Airport | - | |
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| HHH | KHXD | Hilton Head Airport | Hilton Head | |
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| HNH | PAOH | Hoonah Airport | Hoonah | |
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| HUS | PAHU | Hughes Airport | Hughes | |
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| IGG | PAIG | Igiugig Airport | Igiugig | |
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| VYS | KVYS | Illinois Valley Regional Airport-Walter A Duncan Field | Peru | |
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| IMM | KIMM | Immokalee Regional Airport | Immokalee | |
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| IDP | KIDP | Independence Municipal Airport | Independence | |
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| IYK | KIYK | Inyokern Airport | Inyokern | |
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| ECA | K6D9 | Iosco County Airport | East Tawas | |
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| IOW | KIOW | Iowa City Municipal Airport | Iowa City | |
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| JAS | KJAS | Jasper County Airport-Bell Field | Jasper | |
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| JEF | KJEF | Jefferson City Memorial Airport | Jefferson City | |
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| LXN | KLXN | Jim Kelly Field | Lexington | |
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| RAC | KRAC | John H Batten Airport | Racine | |
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| OJC | KOJC | Johnson County Executive Airport | - | |
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| JOT | KJOT | Joliet Regional Airport | Joliet | |
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| LUP | PHLU | Kalaupapa Airport | Kalaupapa | |
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| KLG | PALG | Kalskag Airport | Kalskag | |
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| KAL | PAKV | Kaltag Airport | Kaltag | |
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| KYK | PAKY | Karluk Airport | Karluk | |
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| KUK | PFKA | Kasigluk Airport | Kasigluk | |
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| EOK | KEOK | Keokuk Municipal Airport | Keokuk | |
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| ERV | KERV | Kerrville Municipal Louis Schreiner Field | Kerrville | |
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| KVC | PAVC | King Cove Airport | King Cove | |
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| KPN | PAKI | Kipnuk Airport | Kipnuk | |
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| RKD | KRKD | Knox County Regional Airport | Rockland | |
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| OBU | PAOB | Kobuk Airport | Kobuk | |
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| OKK | KOKK | Kokomo Municipal Airport | Kokomo | |
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