| Illingen to Oestrich-Winkel | 60.42 mi (97.23 km) |
| Illingen to Offenburg | 74.50 mi (119.89 km) |
| Illingen to Oftersheim | 68.93 mi (110.93 km) |
| Illingen to Ohrdruf | 191.44 mi (308.10 km) |
| Illingen to Ohringen | 110.97 mi (178.58 km) |
| Illingen to Olbernhau | 292.62 mi (470.92 km) |
| Illingen to Olching | 210.41 mi (338.61 km) |
| Illingen to Oldenburg | 265.10 mi (426.63 km) |
| Illingen to Oldenburg in Holstein | 377.32 mi (607.24 km) |
| Illingen to Olfen | 162.35 mi (261.28 km) |
| Illingen to Olpe | 118.48 mi (190.67 km) |
| Illingen to Olsberg | 150.23 mi (241.77 km) |
| Illingen to Oranienburg | 355.56 mi (572.22 km) |
| Illingen to Ortenberg | 111.95 mi (180.17 km) |
| Illingen to Oschatz | 298.14 mi (479.81 km) |
