| Oro Valley to Smolyan | 6,598.53 mi (10,619.31 km) |
| Oro Valley to Sofia | 6,494.71 mi (10,452.22 km) |
| Oro Valley to Sopot | 6,540.64 mi (10,526.15 km) |
| Oro Valley to Sozopol | 6,640.33 mi (10,686.58 km) |
| Oro Valley to Sredets | 6,629.77 mi (10,669.58 km) |
| Oro Valley to Stamboliyski | 6,562.85 mi (10,561.89 km) |
| Oro Valley to Stara Zagora | 6,579.65 mi (10,588.92 km) |
| Oro Valley to Svilengrad | 6,633.52 mi (10,675.62 km) |
| Oro Valley to Svishtov | 6,504.39 mi (10,467.81 km) |
| Oro Valley to Targovishte | 6,560.84 mi (10,558.65 km) |
| Oro Valley to Teteven | 6,511.27 mi (10,478.87 km) |
| Oro Valley to Troyan | 6,526.64 mi (10,503.62 km) |
| Oro Valley to Tryavna | 6,550.86 mi (10,542.59 km) |
| Oro Valley to Tutrakan | 6,516.43 mi (10,487.18 km) |
| Oro Valley to Varna | 6,600.64 mi (10,622.71 km) |
