| IN54 | I & C Field Airport | Culver IN |
| 4R1 | I H Bass Jr Memorial Airport | Lumberton MS |
| II44 | I U Health Starke Hospital Heliport | Knox IN |
| NV12 | I-l Ranch Airport | Tuscarora NV |
| WY22 | Iberlin Ranch Nr 1 Airport | Savageton WY |
| WY18 | Iberlin Ranch Nr 2 Airport | Midwest WY |
| WY02 | Iberlin Ranch Nr 3 Airport | Bill WY |
| WY23 | Iberlin Strip Airport | Sussex WY |
| 66VA | Ibm Building 110 Heliport | Manassas VA |
| WN81 | Ice Harbor Dam Heliport | Pasco WA |
| 1PS0 | Ickes Airport | Osterburg PA |
| 19AK | Icy Bay Airport | Icy Bay AK |
| 2AK8 | Icy Cape Afs Airport | Icy Cape AK |
| IDG | Ida Grove Muni Airport | Ida Grove IA |
| L87 | Ida's Heliport | Ida LA |
| U98 | Idaho City Usfs Airport | Idaho City ID |
| GIC | Idaho County Airport | Grangeville ID |
| IDA | Idaho Falls Rgnl Airport | Idaho Falls ID |
| NJ69 | Ideal Air Strip Airport | Hammonton NJ |
| FL63 | Idle Wild Airport | Ocala FL |
| 72CO | Idler Bro's Airport | Kirk CO |
| CO84 | Idlers Fld Airport | Kirk CO |
| 35MA | Idlewide Heliport | Beverly MA |
| XS11 | Idlewild Airport | Medina TX |
| 1NJ6 | Idylease Helistop Heliport | Newfoundland NJ |
| NJ90 | Iff R & D Heliport | Union Beach NJ |
| 2LA2 | Igh Heliport | New Iberia LA |
| IGG | Igiugig Airport | Igiugig AK |
| 43IS | Igoe Heliport | Seymour IL |
| BDR | Igor I Sikorsky Memorial Airport | Bridgeport CT |
| NM23 | Ihs Hospital Heliport | Mescalero NM |
| 4MD8 | Ijamsville Airport | Frederick MD |
| 34LL | Il Dept Of Corrections/lawrence County Heliport | Sumner IL |
| IL20 | Il Emergency Operations Center Heliport | Springfield IL |
| IS48 | Il State Police District 22 Heliport | Ullin IL |
| 2IL8 | Il.dept Of Transportation Heliport | Elgin IL |
| ME04 | Ilco Landing Area Seaplane Base | Clayton Lake ME |
| ILI | Iliamna Airport | Iliamna AK |
| IS44 | Illini Community Hospital Heliport | Pittsfield IL |
| 3S4 | Illinois Valley Airport | Cave Junction OR |
| IS49 | Illinois Valley Community Hospital Heliport | Peru IL |
| 81IL | Illinois Valley Parachute Club Airport | Minier IL |
| VYS | Illinois Valley Rgnl-walter A Duncan Field Airport | Peru IL |
| 7IL5 | Illinois Wing & Rotor Heliport | Villa Grove IL |
| 3MN6 | Immanuel - St Joseph's Hospital Heliport | Mankato MN |
| NE71 | Immanuel Medical Center Heliport | Omaha NE |
| IMM | Immokalee Rgnl Airport | Immokalee FL |
| NRS | Imperial Beach Nolf (ream Fld) Airport | Imperial Beach CA |
| IPL | Imperial County Airport | Imperial CA |
| IML | Imperial Muni Airport | Imperial NE |
| 3AZ9 | Ina Road Heliport | Tucson AZ |
| 93AZ | Inde Motorsports Ranch Airport | Willcox AZ |
| 2O7 | Independence Airport | Independence CA |
| 5WI6 | Independence Airport | Independence WI |
| 2AK9 | Independence Creek Airport | Independence Creek AK |
| IIB | Independence Muni Airport | Independence IA |
| IDP | Independence Muni Airport | Independence KS |
| 2MO3 | Independence Rgnl Health Center Heliport | Independence MO |
| 7S5 | Independence State Airport | Independence OR |
| 56G | Indian Creek Ranch Airport | Deckerville MI |
| S81 | Indian Creek Usfs Airport | Indian Creek ID |
| 31XA | Indian Falls Ranch Airport | Llano TX |
| FL75 | Indian Hammock Airport | Fort Drum FL |
| TN50 | Indian Hill Farm Airport | New Hope TN |
| 2AZ1 | Indian Hills Airpark Airport | Salome AZ |
| 2II0 | Indian Hills Flying Field Airport | Kokomo IN |
| 9CO4 | Indian Hills/fire Department Heliport | Indian Hills CO |
| 7NJ0 | Indian Mills Heliport | Medford NJ |
| UTO | Indian Mountain Lrrs Airport | Utopia Creek AK |
| 15TN | Indian Path Medical Center Heliport | Kingsport TN |
| FL74 | Indian River Aerodrome Airport | Vero Beach FL |
| 3FD7 | Indian River Memorial Hospital Heliport | Vero Beach FL |
| 5PA7 | Indian Sleep Farm Heliport | Unionville PA |
| 3TN0 | Indian Springs Airport | Kingsport TN |
| 7XS7 | Indian Springs Ranch Airport | Fredericksburg TX |
| 30CA | Indian Valley Hospital Heliport | Greenville CA |
| IDI | Indiana County/jimmy Stewart Fld/ Airport | Indiana PA |
| PN32 | Indiana Rgnl Medical Center Heliport | Indiana PA |
| 8IN1 | Indiana University Health Arnett Heliport | Lafayette IN |
| 2IG6 | Indiana University Health Bloomington Heliport | Bloomington IN |
| 64IG | Indiana University Health Paoli Inc Heliport | Paoli IN |
| 5IN1 | Indiana University Health West Hospital Heliport | Avon IN |
| 8A4 | Indianapolis Downtown Heliport | Indianapolis IN |
| TYQ | Indianapolis Executive Airport | Indianapolis IN |
| IND | Indianapolis Intl Airport | Indianapolis IN |
| UMP | Indianapolis Metropolitan Airport | Indianapolis IN |
| MQJ | Indianapolis Rgnl Airport | Indianapolis IN |
| WS79 | Indianhead Medical Center Heliport | Shell Lake WI |
| IA71 | Indianola Heliport | Indianola IA |
| IDL | Indianola Muni Airport | Indianola MS |
| X58 | Indiantown Airport | Indiantown FL |
| 2XS2 | Indio-faith Airport | Carrizo Springs TX |
| 3NJ6 | Inductotherm Airport | Rancocas NJ |
| NM83 | Industrial Airpark Airport | Hobbs NM |
| TX10 | Industrial Helicopters Inc Heliport | Corpus Christi TX |
| XS87 | Industrial Helicopters Inc Heliport | Port O'connor TX |
| 10LA | Industrial Helicopters Inc. Airport | Scott LA |
| 38OH | Industry Air Park Airport | Baltimore OH |
| CN06 | Infineon Raceway Pad 2 Heliport | Sonoma CA |
| 9TX8 | Infomart Heliport | Dallas TX |
| FL12 | Ingalls Field Airport | Miccosukee FL |
| HSP | Ingalls Field Airport | Hot Springs VA |
| IL92 | Ingalls Memorial Hospital Heliport | Harvey IL |
| 30K | Ingalls Muni Airport | Ingalls KS |
| 7NA4 | Ingebretson Airspray Airport | Mayville ND |
| 4KS2 | Ingels Aerodrome Airport | De Soto KS |
| CTK | Ingersoll Airport | Canton IL |
| 1IS7 | Ingersoll Heliport | Rockford IL |
| MI34 | Ingham Medical Helistop Heliport | Lansing MI |
| SD43 | Ingle Airport | Cavour SD |
| MN66 | Ingleside Airport | Loretto MN |
| MU41 | Ingram Private Airport | Purdy MO |
| FD56 | Inhome Medical Landing Heliport | Crescent City FL |
| 4AK1 | Inigok Airport | Deadhorse AK |
| ND24 | Inkster Airport | Inkster ND |
| 2CL8 | Inland Valley Reg Med Ctr Heliport | Wildomar CA |
| AZ62 | Inn Place Hotel Heliport | Phoenix AZ |
| 1LS2 | Innis Community Health Center Heliport | Innis LA |
| ND45 | Innovis Health Heliport | Fargo ND |
| 9VA8 | Innsbrook Pavilion Heliport | Richmond VA |
| VG02 | Innsbrook Technical Center Heliport | Richmond VA |
| 9VA2 | Inova Alexandria Hospital Heliport | Alexandria VA |
| 74VA | Inova Fair Oaks Hospital Heliport | Fairfax VA |
| 72VA | Inova Fairfax Hospital Heliport | Fairfax VA |
| 7OR8 | Inshallah Intl Airport | Seneca OR |
| 43OR | Inspiration Airport | Bend OR |
| PR13 | Insular Government Number Two Heliport | San Juan PR |
| OK19 | Integris Baptist Medical Center Heliport | Oklahoma City OK |
| 5OK5 | Integris Clinton Rgnl Hospital Heliport | Clinton OK |
| 7OK3 | Integris Mayes County Medical Center Heliport | Pryor OK |
| 24OK | Integris Seminole Medical Center Heliport | Seminole OK |
| 50OK | Integris Southwest Medical Center Heliport | Oklahoma City OK |
| 31D | Inter County Airport | Irwin PA |
| MO29 | Inter-state Airport | Pleasant Hill MO |
| 3TS4 | Intermedics Heliport | Angleton TX |
| UT11 | Intermountain Medical Center Heliport | Murray UT |
| 09I | International Falls Seaplane Base | International Falls MN |
| MN83 | International Falls Memorial Heliport | International Falls MN |
| CL49 | International Tower Heliport | Los Angeles CA |
| GA54 | Interstate North Heliport | Atlanta GA |
| NH86 | Intervale Airport | Henniker NH |
| JY12 | Intl Crossroads Heliport | Mahwah NJ |
| S28 | Intl Peace Garden Airport | Dunseith ND |
| 1TN8 | Into The Wind Airport | Seymour TN |
| FL87 | Intra Coastal Police Sub-station Heliport | North Miami Beach FL |
| INF | Inverness Airport | Inverness FL |
| 4CL7 | Inyo County Sheriff Search & Rescue Heliport | Bishop CA |
| IYK | Inyokern Airport | Inyokern CA |
| WI64 | Iola Emergency Heliport | Iola WI |
| S23 | Ione Muni Airport | Ione WA |
| Y70 | Ionia County Airport | Ionia MI |
| 6D9 | Iosco County Airport | East Tawas MI |
| 31LA | Iota Volunteer Fire Department Heliport | Iota LA |
| IOW | Iowa City Muni Airport | Iowa City IA |
| MRJ | Iowa County Airport | Mineral Point WI |
| IFA | Iowa Falls Muni Airport | Iowa Falls IA |
| IA98 | Iowa Lutheran Hospital Life Flight Heliport | Des Moines IA |
| IA64 | Iowa Methodist Medical Center Heliport | Des Moines IA |
| CA12 | Ipp Adelanto Heliport | Adelanto CA |
| WY14 | Ipy Ranch Airport | Hulett WY |
| 0T3 | Ira Biffle Airfield Airport | Marble Hill MO |
| 52AR | Ira's Airstrip Airport | Greenbrier AR |
| 2F0 | Iraan Muni Airport | Iraan TX |
| II94 | Irion Airport | Noblesville IN |
| 33CT | Irish Hills Farms Airport | Bethlehem CT |
| 24WI | Irlbeck Airport | Somerset WI |
| 50D | Iron County Airport | Crystal Falls MI |
| 22OR | Iron Crown Airport | Silverton OR |
| 72CL | Iron Mountain Pumping Plant Airport | Desert Center CA |
| 5TE5 | Iron Mountain Ranch Airport | Marathon TX |
| T58 | Ironhead Airport | Sanger TX |
| 5MO1 | Irons Airport | Moberly MO |
| MY38 | Irons Point Seaplane Base | Tower MN |
| 02NH | Iroquois Landing Seaplane Base | Dummer NH |
| IS89 | Iroquois Memorial Hospital Heliport | Watseka IL |
| 8AN6 | Isaacson Airport | Medical Lake WA |
| 3Y7 | Isabel Muni Airport | Isabel SD |
| 21NC | Isbell Heliport | Hertford NC |
| 4A9 | Isbell Field Airport | Fort Payne AL |
| 14XS | Isbell Ranch Airport | Davilla TX |
| HZX | Isedor Iverson Airport | Mc Gregor MN |
| WV08 | Island Airport | Chesapeake WV |
| MA65 | Island Air Service Seaplane Base | Rochester MA |
| 2AR9 | Island Health Clinic Heliport | Holiday Island AR |
| 2R3 | Island Lake Seaplane Base | Kenai AK |
| 29A | Island Lake Seaplane Base | Wasilla AK |
| 4WI2 | Island View Airport | Crandon WI |
| MY72 | Isle Private Airport | Isle MN |
| TN43 | Isle-a-port Airport | Memphis TN |
| 57B | Islesboro Airport | Islesboro ME |
| 24IA | Isley Field Airport | Cedar Falls IA |
| WA56 | Israel's Farm Airport | Sedro Woolley WA |
| ITH | Ithaca Tompkins Rgnl Airport | Ithaca NY |
| CT89 | Itt Heliport | Shelton CT |
| MN60 | Itzen Air Strip Airport | Herman MN |
| 15M | Iuka Airport | Iuka MS |
| 16MS | Iuka Hospital Heliport | Iuka MS |
| 7IN5 | Iv Health La Porte Hospital Heliport | La Porte IN |
| SC34 | Iva Field Airport | Iva SC |
| KIB | Ivanof Bay Seaplane Base | Ivanof Bay AK |
| OK96 | Ives Airport | Wellston OK |
| WY40 | Ivinson Memorial Hospital Heliport | Laramie WY |
| 9MO6 | Ivy Bend Airport | Stover MO |
| VA65 | Ivy Hill Airport | Lynchburg VA |
| IG01 | Iwc Heliport | Indianapolis IN |
