| Illzach to Oestrich-Winkel | 156.07 mi (251.17 km) |
| Illzach to Offenburg | 54.45 mi (87.63 km) |
| Illzach to Oftersheim | 123.45 mi (198.67 km) |
| Illzach to Ohrdruf | 259.83 mi (418.15 km) |
| Illzach to Ohringen | 138.93 mi (223.59 km) |
| Illzach to Olbernhau | 335.48 mi (539.91 km) |
| Illzach to Olching | 185.74 mi (298.93 km) |
| Illzach to Oldenburg | 372.40 mi (599.32 km) |
| Illzach to Oldenburg in Holstein | 475.65 mi (765.48 km) |
| Illzach to Olfen | 271.85 mi (437.50 km) |
| Illzach to Olpe | 224.54 mi (361.37 km) |
| Illzach to Olsberg | 251.70 mi (405.07 km) |
| Illzach to Oranienburg | 430.58 mi (692.95 km) |
| Illzach to Ortenberg | 193.87 mi (312.01 km) |
| Illzach to Oschatz | 354.43 mi (570.39 km) |
