| Keene to Smolyan | 4,651.73 mi (7,486.24 km) |
| Keene to Sofia | 4,549.07 mi (7,321.01 km) |
| Keene to Sopot | 4,608.48 mi (7,416.64 km) |
| Keene to Sozopol | 4,736.08 mi (7,621.99 km) |
| Keene to Sredets | 4,719.20 mi (7,594.81 km) |
| Keene to Stamboliyski | 4,621.60 mi (7,437.75 km) |
| Keene to Stara Zagora | 4,653.81 mi (7,489.58 km) |
| Keene to Svilengrad | 4,704.54 mi (7,571.23 km) |
| Keene to Svishtov | 4,591.56 mi (7,389.41 km) |
| Keene to Targovishte | 4,655.90 mi (7,492.95 km) |
| Keene to Teteven | 4,577.82 mi (7,367.29 km) |
| Keene to Troyan | 4,597.29 mi (7,398.63 km) |
| Keene to Tryavna | 4,629.32 mi (7,450.17 km) |
| Keene to Tutrakan | 4,622.95 mi (7,439.93 km) |
| Keene to Varna | 4,709.68 mi (7,579.50 km) |
