| North Adams to Smolyan | 4,695.87 mi (7,557.27 km) |
| North Adams to Sofia | 4,593.15 mi (7,391.96 km) |
| North Adams to Sopot | 4,652.45 mi (7,487.40 km) |
| North Adams to Sozopol | 4,779.80 mi (7,692.35 km) |
| North Adams to Sredets | 4,762.98 mi (7,665.27 km) |
| North Adams to Stamboliyski | 4,665.67 mi (7,508.68 km) |
| North Adams to Stara Zagora | 4,697.73 mi (7,560.26 km) |
| North Adams to Svilengrad | 4,748.51 mi (7,641.99 km) |
| North Adams to Svishtov | 4,635.31 mi (7,459.81 km) |
| North Adams to Targovishte | 4,699.59 mi (7,563.27 km) |
| North Adams to Teteven | 4,621.79 mi (7,438.05 km) |
| North Adams to Troyan | 4,641.23 mi (7,469.33 km) |
| North Adams to Tryavna | 4,673.18 mi (7,520.75 km) |
| North Adams to Tutrakan | 4,666.50 mi (7,510.00 km) |
| North Adams to Varna | 4,753.24 mi (7,649.60 km) |
