| Acqui Terme to Oerlinghausen | 503.81 mi (810.81 km) |
| Acqui Terme to Oestrich-Winkel | 368.50 mi (593.04 km) |
| Acqui Terme to Offenburg | 263.13 mi (423.47 km) |
| Acqui Terme to Oftersheim | 324.40 mi (522.08 km) |
| Acqui Terme to Ohrdruf | 437.83 mi (704.61 km) |
| Acqui Terme to Ohringen | 316.33 mi (509.08 km) |
| Acqui Terme to Olbernhau | 471.51 mi (758.81 km) |
| Acqui Terme to Olching | 278.65 mi (448.44 km) |
| Acqui Terme to Oldenburg | 585.18 mi (941.76 km) |
| Acqui Terme to Oldenburg in Holstein | 673.62 mi (1,084.08 km) |
| Acqui Terme to Olfen | 489.00 mi (786.98 km) |
| Acqui Terme to Olpe | 439.08 mi (706.63 km) |
| Acqui Terme to Olsberg | 461.12 mi (742.10 km) |
| Acqui Terme to Oranienburg | 598.66 mi (963.45 km) |
| Acqui Terme to Ortenberg | 393.38 mi (633.08 km) |
