| Olen to Zulte | 63.63 mi (102.40 km) |
| Olen to Zwevegem | 70.27 mi (113.10 km) |
| Olen to Zwijndrecht | 22.85 mi (36.77 km) |
| Olen to Asenovgrad | 1,135.15 mi (1,826.85 km) |
| Olen to Aytos | 1,200.64 mi (1,932.24 km) |
| Olen to Balchik | 1,208.84 mi (1,945.44 km) |
| Olen to Bankya | 1,037.23 mi (1,669.25 km) |
| Olen to Bansko | 1,090.31 mi (1,754.68 km) |
| Olen to Berkovitsa | 1,013.00 mi (1,630.26 km) |
| Olen to Blagoevgrad | 1,067.08 mi (1,717.31 km) |
| Olen to Botevgrad | 1,053.72 mi (1,695.79 km) |
| Olen to Burgas | 1,217.77 mi (1,959.81 km) |
| Olen to Byala Slatina | 1,035.22 mi (1,666.03 km) |
| Olen to Chirpan | 1,144.93 mi (1,842.58 km) |
| Olen to Devnya | 1,192.57 mi (1,919.26 km) |
