| Glenn Heights to Smolyan | 6,110.87 mi (9,834.50 km) |
| Glenn Heights to Sofia | 6,006.84 mi (9,667.07 km) |
| Glenn Heights to Sopot | 6,061.45 mi (9,754.96 km) |
| Glenn Heights to Sozopol | 6,178.96 mi (9,944.08 km) |
| Glenn Heights to Sredets | 6,164.50 mi (9,920.81 km) |
| Glenn Heights to Stamboliyski | 6,078.30 mi (9,782.08 km) |
| Glenn Heights to Stara Zagora | 6,104.67 mi (9,824.52 km) |
| Glenn Heights to Svilengrad | 6,157.15 mi (9,908.97 km) |
| Glenn Heights to Svishtov | 6,036.51 mi (9,714.82 km) |
| Glenn Heights to Targovishte | 6,098.24 mi (9,814.17 km) |
| Glenn Heights to Teteven | 6,031.02 mi (9,705.98 km) |
| Glenn Heights to Troyan | 6,049.03 mi (9,734.97 km) |
| Glenn Heights to Tryavna | 6,078.20 mi (9,781.93 km) |
| Glenn Heights to Tutrakan | 6,060.14 mi (9,752.86 km) |
| Glenn Heights to Varna | 6,146.75 mi (9,892.24 km) |
