| Rank | Country | Airports density |
181 | Saint Martin | 30,615 people per Airport |
223 | Saint Pierre and Miquelon | 2,944 people per Airport |
194 | Saint Vincent and the Grenadines | 17,312 people per Airport |
159 | Samoa | 48,291 people per Airport |
| San Marino | void |
132 | Sao Tome and Principe | 89,753 people per Airport |
120 | Saudi Arabia | 120,423 people per Airport |
30 | Senegal | 632,190 people per Airport |
73 | Serbia | 252,089 people per Airport |
213 | Seychelles | 6,371 people per Airport |
35 | Sierra Leone | 595,964 people per Airport |
36 | Singapore | 592,593 people per Airport |
167 | Sint Maarten | 37,429 people per Airport |
102 | Slovakia | 152,140 people per Airport |
118 | Slovenia | 125,006 people per Airport |
197 | Solomon Islands | 15,886 people per Airport |
97 | Somalia | 168,232 people per Airport |
133 | South Africa | 84,783 people per Airport |
| South Georgia and the South Sandwich Islands | void |
60 | South Sudan | 344,188 people per Airport |
| Southern Ocean | void |