| Muskegon to Smolyan | 5,178.59 mi (8,334.13 km) |
| Muskegon to Sofia | 5,074.43 mi (8,166.50 km) |
| Muskegon to Sopot | 5,128.18 mi (8,253.00 km) |
| Muskegon to Sozopol | 5,244.39 mi (8,440.03 km) |
| Muskegon to Sredets | 5,230.17 mi (8,417.15 km) |
| Muskegon to Stamboliyski | 5,145.61 mi (8,281.06 km) |
| Muskegon to Stara Zagora | 5,171.05 mi (8,322.01 km) |
| Muskegon to Svilengrad | 5,223.72 mi (8,406.76 km) |
| Muskegon to Svishtov | 5,102.24 mi (8,211.26 km) |
| Muskegon to Targovishte | 5,163.67 mi (8,310.13 km) |
| Muskegon to Teteven | 5,097.81 mi (8,204.13 km) |
| Muskegon to Troyan | 5,115.59 mi (8,232.74 km) |
| Muskegon to Tryavna | 5,144.35 mi (8,279.04 km) |
| Muskegon to Tutrakan | 5,125.20 mi (8,248.21 km) |
| Muskegon to Varna | 5,211.75 mi (8,387.50 km) |
