| Simi Valley to Oerlinghausen | 5,685.90 mi (9,150.57 km) |
| Simi Valley to Oestrich-Winkel | 5,768.19 mi (9,283.00 km) |
| Simi Valley to Offenburg | 5,845.20 mi (9,406.94 km) |
| Simi Valley to Oftersheim | 5,818.07 mi (9,363.27 km) |
| Simi Valley to Ohrdruf | 5,803.61 mi (9,340.01 km) |
| Simi Valley to Ohringen | 5,854.03 mi (9,421.15 km) |
| Simi Valley to Olbernhau | 5,883.74 mi (9,468.96 km) |
| Simi Valley to Olching | 5,960.20 mi (9,592.02 km) |
| Simi Valley to Oldenburg | 5,612.52 mi (9,032.48 km) |
| Simi Valley to Oldenburg in Holstein | 5,623.84 mi (9,050.69 km) |
| Simi Valley to Olfen | 5,662.14 mi (9,112.33 km) |
| Simi Valley to Olpe | 5,711.01 mi (9,190.98 km) |
| Simi Valley to Olsberg | 5,712.59 mi (9,193.53 km) |
| Simi Valley to Oranienburg | 5,767.66 mi (9,282.16 km) |
| Simi Valley to Ortenberg | 5,780.66 mi (9,303.07 km) |
