| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| SLACK | airport | United States | 40.30 | -75.08 | 275 | 0 | |
| SLACK | airport | United States | 29.86 | -94.83 | 35 | 0 | |
| SLATE CREEK | airport | United States | 45.67 | -116.31 | 1660 | 0 | |
| SLATE HILL | airport | United States | 41.37 | -74.51 | 505 | 0 | |
| SLATE RUN | airport | United States | 38.78 | -81.31 | 1000 | 0 | |
| SLATER FLD | airport | United States | 38.76 | -75.75 | 45 | 0 | |
| SLATER MEMORIAL | airport | United States | 39.23 | -93.07 | 860 | 0 | |
| SLATINGTON | airport | United States | 40.76 | -75.60 | 380 | 0 | |
| SLATON MUNI | airport | United States | 33.48 | -101.66 | 3123 | 0 | |
| SLAUGHTER | airport | United States | 39.62 | -92.87 | 800 | 0 | |
| SLAUGHTER RANCH | airport | United States | 30.61 | -98.30 | 890 | 0 | |
| SLAY'S | airport | United States | 32.75 | -93.87 | 177 | 0 | |
| SLAYTON MUNI | airport | United States | 43.99 | -95.78 | 1623 | 0 | |
| SLB (STORM LAKE MUNI) | airport | United States | 42.60 | -95.24 | 1488 | 0 | |
| SLC (SALT LAKE CITY INTL) | airport | United States | 40.79 | -111.98 | 4227 | 0 | |
| SLE (MCNARY FLD) | airport | United States | 44.91 | -123.00 | 214 | 0 | |
| SLED | airport | United States | 34.07 | -81.12 | 275 | 0 | |
| SLEEPERS STRIP | airport | United States | 61.25 | -149.98 | 125 | 0 | |
| SLEEPY EYE MUNI | airport | United States | 44.25 | -94.72 | 1004 | 0 | |
| SLEEPY HOLLOW | airport | United States | 33.69 | -83.66 | 750 | 0 | |
| SLEEPY HOLLOW | airport | United States | 40.78 | -81.10 | 1050 | 0 | |
| SLEETMUTE | airport | United States | 61.70 | -157.17 | 190 | 0 | |
| SLG (SMITH FLD) | airport | United States | 36.19 | -94.49 | 1193 | 0 | |
| SLIDELL | airport | United States | 30.35 | -89.82 | 28 | 0 | |
| SLIGARS LANDING | airport | United States | 42.59 | -114.36 | 3800 | 0 | |
| SLINKARD AIRFIELD | airport | United States | 46.60 | -119.06 | 890 | 0 | |
| SLIP KNOT LANDING | airport | United States | 43.82 | -70.44 | 310 | 0 | |
| SLK (ADIRONDACK RGNL) | airport | United States | 44.39 | -74.21 | 1663 | 0 | |
| SLN (SALINA MUNI) | airport | United States | 38.79 | -97.65 | 1288 | 0 | |
| SLO (SALEM LECKRONE) | airport | United States | 38.64 | -88.96 | 573 | 0 | |
| SLOAN | airport | United States | 41.16 | -104.71 | 6085 | 0 | |
| SLOAN'S | airport | United States | 39.14 | -90.74 | 437 | 0 | |
| SLOAS | airport | United States | 41.27 | -80.77 | 885 | 0 | |
| SLOBOVIA OUTERNATIONAL | airport | United States | 32.50 | -90.29 | 250 | 0 | |
| SLOOP | airport | United States | 35.52 | -80.52 | 794 | 0 | |
| SLOULIN FLD INTL | airport | United States | 48.18 | -103.64 | 1982 | 0 | |
| SLQ (SLEETMUTE) | airport | United States | 61.70 | -157.17 | 190 | 0 | |
| SLR (SULPHUR SPRINGS MUNI) | airport | United States | 33.16 | -95.62 | 489 | 0 | |
| SLT (HARRIET ALEXANDER FLD) | airport | United States | 38.54 | -106.05 | 7523 | 0 | |
| SLUDER AIRSTRIP | airport | United States | 43.40 | -114.27 | 5017 | 0 |