| Kirkwall to Smolyan | 1,690.49 mi (2,720.58 km) |
| Kirkwall to Sofia | 1,586.91 mi (2,553.89 km) |
| Kirkwall to Sopot | 1,632.37 mi (2,627.04 km) |
| Kirkwall to Sozopol | 1,736.58 mi (2,794.76 km) |
| Kirkwall to Sredets | 1,724.49 mi (2,775.30 km) |
| Kirkwall to Stamboliyski | 1,654.59 mi (2,662.81 km) |
| Kirkwall to Stara Zagora | 1,671.84 mi (2,690.56 km) |
| Kirkwall to Svilengrad | 1,725.61 mi (2,777.10 km) |
| Kirkwall to Svishtov | 1,597.90 mi (2,571.57 km) |
| Kirkwall to Targovishte | 1,656.31 mi (2,665.57 km) |
| Kirkwall to Teteven | 1,602.94 mi (2,579.68 km) |
| Kirkwall to Troyan | 1,618.46 mi (2,604.66 km) |
| Kirkwall to Tryavna | 1,643.38 mi (2,644.76 km) |
| Kirkwall to Tutrakan | 1,614.59 mi (2,598.43 km) |
| Kirkwall to Varna | 1,700.40 mi (2,736.53 km) |
