| Olpe to Smolyan | 1,031.67 mi (1,660.31 km) |
| Olpe to Sofia | 927.55 mi (1,492.75 km) |
| Olpe to Sopot | 982.90 mi (1,581.82 km) |
| Olpe to Sozopol | 1,107.58 mi (1,782.48 km) |
| Olpe to Sredets | 1,090.86 mi (1,755.57 km) |
| Olpe to Stamboliyski | 999.00 mi (1,607.74 km) |
| Olpe to Stara Zagora | 1,027.10 mi (1,652.95 km) |
| Olpe to Svilengrad | 1,078.86 mi (1,736.26 km) |
| Olpe to Svishtov | 963.11 mi (1,549.97 km) |
| Olpe to Targovishte | 1,027.44 mi (1,653.50 km) |
| Olpe to Teteven | 952.34 mi (1,532.65 km) |
| Olpe to Troyan | 970.95 mi (1,562.59 km) |
| Olpe to Tryavna | 1,001.73 mi (1,612.14 km) |
| Olpe to Tutrakan | 995.69 mi (1,602.40 km) |
| Olpe to Varna | 1,082.15 mi (1,741.55 km) |
