| Merriam to Smolyan | 5,691.82 mi (9,160.09 km) |
| Merriam to Sofia | 5,587.54 mi (8,992.27 km) |
| Merriam to Sopot | 5,639.76 mi (9,076.32 km) |
| Merriam to Sozopol | 5,752.67 mi (9,258.03 km) |
| Merriam to Sredets | 5,739.22 mi (9,236.38 km) |
| Merriam to Stamboliyski | 5,658.22 mi (9,106.03 km) |
| Merriam to Stara Zagora | 5,681.90 mi (9,144.14 km) |
| Merriam to Svilengrad | 5,734.93 mi (9,229.48 km) |
| Merriam to Svishtov | 5,611.57 mi (9,030.94 km) |
| Merriam to Targovishte | 5,672.05 mi (9,128.28 km) |
| Merriam to Teteven | 5,609.54 mi (9,027.69 km) |
| Merriam to Troyan | 5,626.85 mi (9,055.54 km) |
| Merriam to Tryavna | 5,654.71 mi (9,100.37 km) |
| Merriam to Tutrakan | 5,632.17 mi (9,064.10 km) |
| Merriam to Varna | 5,718.41 mi (9,202.88 km) |
