| Ontario to Smolyan | 6,690.39 mi (10,767.14 km) |
| Ontario to Sofia | 6,588.05 mi (10,602.44 km) |
| Ontario to Sopot | 6,628.28 mi (10,667.18 km) |
| Ontario to Sozopol | 6,716.24 mi (10,808.74 km) |
| Ontario to Sredets | 6,708.08 mi (10,795.61 km) |
| Ontario to Stamboliyski | 6,653.34 mi (10,707.52 km) |
| Ontario to Stara Zagora | 6,664.30 mi (10,725.15 km) |
| Ontario to Svilengrad | 6,718.27 mi (10,812.02 km) |
| Ontario to Svishtov | 6,585.91 mi (10,599.00 km) |
| Ontario to Targovishte | 6,638.53 mi (10,683.69 km) |
| Ontario to Teteven | 6,599.91 mi (10,621.53 km) |
| Ontario to Troyan | 6,613.54 mi (10,643.47 km) |
| Ontario to Tryavna | 6,634.54 mi (10,677.25 km) |
| Ontario to Tutrakan | 6,591.07 mi (10,607.31 km) |
| Ontario to Varna | 6,672.76 mi (10,738.78 km) |
