| Rank | Country | Airports density |
207 | Saint Helena |  7,601 people per Airport |
189 | Saint Kitts and Nevis |  19,810 people per Airport |
127 | Saint Lucia |  86,442 people per Airport |
178 | Saint Martin |  29,376 people per Airport |
220 | Saint Pierre and Miquelon |  3,522 people per Airport |
190 | Saint Vincent and the Grenadines |  19,739 people per Airport |
147 | Samoa |  54,271 people per Airport |
| San Marino |  void |
123 | Sao Tome and Principe |  103,089 people per Airport |
111 | Saudi Arabia |  132,214 people per Airport |
23 | Senegal |  642,663 people per Airport |
55 | Serbia |  350,312 people per Airport |
| Serbia and Montenegro | void |
213 | Seychelles |  5,484 people per Airport |
26 | Sierra Leone |  629,478 people per Airport |
31 | Singapore |  576,021 people per Airport |
96 | Slovakia |  155,869 people per Airport |
101 | Slovenia |  143,408 people per Airport |
194 | Solomon Islands |  16,610 people per Airport |
102 | Somalia |  142,667 people per Airport |
143 | South Africa |  60,146 people per Airport |
| South Georgia and the South Sandwich Islands | void |
| Southern Ocean | void |
67 | Spain |  262,929 people per Airport |
| Spratly Islands | void |
10 | Sri Lanka |  1,173,821 people per Airport |
48 | Sudan |  398,203 people per Airport |
200 | Suriname |  9,520 people per Airport |
228 | Svalbard |  542 people per Airport |
141 | Swaziland |  62,712 people per Airport |
166 | Sweden |  36,182 people per Airport |
118 | Switzerland |  116,639 people per Airport |
76 | Syria |  219,418 people per Airport |
34 | Taiwan |  559,048 people per Airport |