| Ardrossan to Smolyan | 1,641.27 mi (2,641.36 km) |
| Ardrossan to Sofia | 1,537.02 mi (2,473.59 km) |
| Ardrossan to Sopot | 1,590.50 mi (2,559.67 km) |
| Ardrossan to Sozopol | 1,709.64 mi (2,751.41 km) |
| Ardrossan to Sredets | 1,694.39 mi (2,726.85 km) |
| Ardrossan to Stamboliyski | 1,607.98 mi (2,587.79 km) |
| Ardrossan to Stara Zagora | 1,633.66 mi (2,629.12 km) |
| Ardrossan to Svilengrad | 1,686.14 mi (2,713.57 km) |
| Ardrossan to Svishtov | 1,566.32 mi (2,520.75 km) |
| Ardrossan to Targovishte | 1,628.99 mi (2,621.61 km) |
| Ardrossan to Teteven | 1,560.11 mi (2,510.75 km) |
| Ardrossan to Troyan | 1,578.01 mi (2,539.57 km) |
| Ardrossan to Tryavna | 1,607.31 mi (2,586.72 km) |
| Ardrossan to Tutrakan | 1,593.24 mi (2,564.08 km) |
| Ardrossan to Varna | 1,680.08 mi (2,703.83 km) |
