| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| SIBBERNSEN | airport | United States | 41.41 | -96.29 | 1280 | 0 | |
| SIBLEY MEMORIAL HOSPITAL | airport | United States | 38.94 | -77.11 | 289 | 0 | |
| SIBLEY MUNI | airport | United States | 43.37 | -95.76 | 1537 | 0 | |
| SICKLER AIRSTRIP | airport | United States | 38.43 | -96.09 | 1200 | 0 | |
| SIDNEY MUNI | airport | United States | 40.24 | -84.15 | 1044 | 0 | |
| SIDNEY MUNI | airport | United States | 42.30 | -75.42 | 1027 | 0 | |
| SIDNEY MUNI LLOYD W CARR FLD | airport | United States | 41.10 | -102.99 | 4313 | 0 | |
| SIDNEY RICHLAND MUNI | airport | United States | 47.71 | -104.19 | 1984 | 0 | |
| SIDS | airport | United States | 42.44 | -71.47 | 220 | 0 | |
| SIEFERT | airport | United States | 39.44 | -85.77 | 750 | 0 | |
| SIEG'S FARM | airport | United States | 43.89 | -94.49 | 1060 | 0 | |
| SIEGFRIED POINT | airport | United States | 36.49 | -94.99 | 740 | 0 | |
| SIEPSERS EYE PORT | airport | United States | 39.97 | -75.66 | 350 | 0 | |
| SIERRA AIRPARK | airport | United States | 28.88 | -82.43 | 115 | 0 | |
| SIERRA BLANCA | airport | United States | 31.17 | -105.36 | 4512 | 0 | |
| SIERRA BLANCA RGNL | airport | United States | 33.46 | -105.53 | 6814 | 0 | |
| SIERRA MEDICAL CENTER | airport | United States | 31.78 | -106.48 | 3905 | 0 | |
| SIERRA NEVADA MEMORIAL HOSPITAL | airport | United States | 39.23 | -121.05 | 2450 | 0 | |
| SIERRA PROVIDENCE HOSPITAL | airport | United States | 31.79 | -106.26 | 4002 | 0 | |
| SIERRA SKY PARK | airport | United States | 36.84 | -119.87 | 321 | 0 | |
| SIERRA VISTA COMMUNITY HOSPITAL | airport | United States | 31.55 | -110.27 | 4548 | 0 | |
| SIERRA VISTA HOSPITAL | airport | United States | 33.14 | -107.24 | 4250 | 0 | |
| SIERRA VISTA MUNI LIBBY AAF | airport | United States | 31.59 | -110.34 | 4719 | 0 | |
| SIERRAVILLE DEARWATER | airport | United States | 39.58 | -120.35 | 4984 | 0 | |
| SIG (FERNANDO LUIS RIBAS DOMINICCI) | airport | United States | 18.46 | -66.10 | 10 | 0 | |
| SIG FIELD | airport | United States | 41.55 | -92.53 | 929 | 0 | |
| SIGNAL PEAK LOOKOUT | airport | United States | 46.23 | -121.13 | 5111 | 0 | |
| SIK (SIKESTON MEM MUNI) | airport | United States | 36.90 | -89.56 | 315 | 0 | |
| SIKESTON MEM MUNI | airport | United States | 36.90 | -89.56 | 315 | 0 | |
| SIKORSKI RANCH | airport | United States | 46.11 | -104.42 | 3330 | 0 | |
| SIKORSKY | airport | United States | 41.25 | -73.10 | 20 | 0 | |
| SIKORSKY BRIDGEPORT | airport | United States | 41.16 | -73.20 | 7 | 0 | |
| SILER CITY MUNI | airport | United States | 35.70 | -79.50 | 614 | 0 | |
| SILERS PLANE VALLEY | airport | United States | 38.87 | -97.54 | 1204 | 0 | |
| SILETZ | airport | United States | 44.73 | -123.92 | 100 | 0 | |
| SILETZ BAY STATE | airport | United States | 44.88 | -124.03 | 69 | 0 | |
| SILLER BROS INC | airport | United States | 39.46 | -121.58 | 235 | 0 | |
| SILLS AIR PARK | airport | United States | 37.67 | -97.02 | 1295 | 0 | |
| SILLS-ANDERSON | airport | United States | 42.30 | -89.24 | 950 | 0 | |
| SILOAM SPRINGS MEMORIAL HOSPITAL | airport | United States | 36.18 | -94.54 | 1140 | 0 | |
| SILVA RANCH | airport | United States | 44.27 | -115.00 | 6400 | 0 | |
| SILVER BAY MUNI | airport | United States | 47.25 | -91.42 | 1089 | 0 | |
| SILVER CITY AIRPARK | airport | United States | 45.13 | -83.45 | 680 | 0 | |
| SILVER CREEK | airport | United States | 38.93 | -89.66 | 595 | 0 | |
| SILVER CREEK | airport | United States | 35.73 | -81.73 | 1020 | 0 | |
| SILVER CREEK RANCH | airport | United States | 40.32 | -123.25 | 2511 | 0 | |
| SILVER CROSS HOSPITAL | airport | United States | 41.54 | -88.05 | 610 | 0 | |
| SILVER LAKE | airport | United States | 43.64 | -86.45 | 772 | 0 | |
| SILVER LAKE | airport | United States | 45.58 | -91.93 | 1248 | 0 | |
| SILVER LAKE F S STRIP | airport | United States | 43.11 | -121.09 | 4492 | 0 | |
| SILVER SPRINGS | airport | United States | 39.40 | -119.25 | 4269 | 0 | |
| SILVER SPRINGS | airport | United States | 39.40 | -119.25 | 4269 | 0 | |
| SILVER WEST | airport | United States | 38.01 | -105.37 | 8290 | 0 | |
| SILVER WINGS | airport | United States | 30.22 | -99.14 | 2110 | 0 | |
| SILVERHILL NOLF | airport | United States | 30.56 | -87.81 | 129 | 0 | |
| SILVERTON JUNCTION | airport | United States | 37.80 | -107.67 | 9272 | 0 | |
| SILVERTON MUNI | airport | United States | 34.47 | -101.30 | 3267 | 0 | |
| SILVERWOOD | airport | United States | 47.91 | -116.71 | 2350 | 0 | |
| SILVERWOOD | airport | United States | 36.01 | -95.84 | 632 | 0 | |
| SIMANDL FIELD/PRIVATE | airport | United States | 42.87 | -88.16 | 805 | 0 | |
| SIMARON RANCH | airport | United States | 30.15 | -95.97 | 310 | 0 | |
| SIMMONS | airport | United States | 42.13 | -70.84 | 90 | 0 | |
| SIMMONS AAF | airport | United States | 35.13 | -78.94 | 242 | 0 | |
| SIMON | airport | United States | 41.10 | -100.74 | 2789 | 0 | |
| SIMONS | airport | United States | 39.72 | -104.73 | 5525 | 0 | |
| SIMONS AIRFIELD | airport | United States | 46.15 | -89.32 | 1735 | 0 | |
| SIMONSON FIELD | airport | United States | 38.15 | -104.71 | 5130 | 0 | |
| SIMPSON | airport | United States | 42.61 | -111.73 | 5598 | 0 | |
| SIMPSON | airport | United States | 41.96 | -97.47 | 1650 | 0 | |
| SIMPSON | airport | United States | 39.09 | -80.03 | 1960 | 0 | |
| SIMPSON FIELD | airport | United States | 30.63 | -89.73 | 175 | 0 | |
| SIMPSONVILLE | airport | United States | 38.33 | -77.87 | 400 | 0 | |
| SIMSBURY | airport | United States | 41.92 | -72.78 | 195 | 0 | |
| SIMTAG FARMS | airport | United States | 45.75 | -119.95 | 550 | 0 | |
| SINAI HOSPITAL | airport | United States | 39.35 | -76.66 | 410 | 0 | |
| SINAI II | airport | United States | 39.36 | -76.66 | 320 | 0 | |
| SINDT | airport | United States | 40.29 | -98.82 | 1990 | 0 | |
| SINELE STRIP | airport | United States | 40.55 | -91.27 | 695 | 0 | |
| SINGING RIVER HOSPITAL | airport | United States | 30.38 | -88.53 | 16 | 0 | |
| SINGLETON | airport | United States | 38.21 | -79.71 | 2060 | 0 | |
| SINGLETON'S LANDING STRIP | airport | United States | 41.35 | -86.63 | 685 | 0 | |
| SIOUX CENTER MUNI | airport | United States | 43.13 | -96.19 | 1448 | 0 | |
| SIOUX GATEWAY COL BUD DAY FLD | airport | United States | 42.40 | -96.38 | 1098 | 0 | |
| SIOUX VALLEY HOSPITAL | airport | United States | 44.31 | -94.48 | 879 | 0 | |
| SIPLE | airport | United States | 39.72 | -75.88 | 419 | 0 | |
| SIROHI | airport | United States | 24.90 | 72.85 | 1000 | 0 | |
| SISKIYOU CO | airport | United States | 41.78 | -122.47 | 2648 | 0 | |
| SISSETON MUNI | airport | United States | 45.67 | -97.00 | 1161 | 0 | |
| SISTERS EAGLE AIR | airport | United States | 44.30 | -121.54 | 3168 | 0 | |
| SIT (SITKA ROCKY GUTIERREZ) | airport | United States | 57.05 | -135.36 | 21 | 0 | |
| SITKA | airport | United States | 57.05 | -135.35 | 0 | 0 | |
| SITKA ROCKY GUTIERREZ | airport | United States | 57.05 | -135.36 | 21 | 0 | |
| SITTON FIELD | airport | United States | 33.12 | -97.32 | 682 | 0 | |
| SITUK | airport | United States | 59.55 | -139.51 | 50 | 0 | |
| SIV (SULLIVAN CO) | airport | United States | 39.11 | -87.45 | 540 | 0 | |
| SIX 666 RANCH | airport | United States | 33.64 | -100.35 | 1775 | 0 | |
| SIX FLAGS GREAT ADVENTURE | airport | United States | 40.15 | -74.43 | 120 | 0 | |
| SIX MILE VOLUNTEER FIRE DEPARTMENT | airport | United States | 31.25 | -93.78 | 240 | 0 | |
| SIX OAKS | airport | United States | 35.47 | -82.45 | 2015 | 0 | |
| SIX PONDS | airport | United States | 42.84 | -74.18 | 1125 | 0 | |
| SIX SPRINGS RANCH | airport | United States | 44.48 | -120.92 | 3780 | 0 | |
| SIX-MILE LAKE | airport | United States | 61.29 | -149.81 | 85 | 0 | |
| SIXTY SIX | airport | United States | 35.90 | -83.58 | 1010 | 0 | |
| SIY (SISKIYOU CO) | airport | United States | 41.78 | -122.47 | 2648 | 0 |