| Citrus Heights to Orbetello | 6,088.79 mi (9,798.96 km) |
| Citrus Heights to Oria | 6,382.17 mi (10,271.11 km) |
| Citrus Heights to Oristano | 6,150.36 mi (9,898.05 km) |
| Citrus Heights to Orta Nova | 6,280.78 mi (10,107.94 km) |
| Citrus Heights to Orte | 6,121.72 mi (9,851.96 km) |
| Citrus Heights to Ortona | 6,185.09 mi (9,953.93 km) |
| Citrus Heights to Orvieto | 6,099.09 mi (9,815.53 km) |
| Citrus Heights to Orzinuovi | 5,885.43 mi (9,471.69 km) |
| Citrus Heights to Osimo | 6,094.18 mi (9,807.63 km) |
| Citrus Heights to Ospitaletto | 5,880.75 mi (9,464.15 km) |
| Citrus Heights to Ostuni | 6,366.99 mi (10,246.69 km) |
| Citrus Heights to Ottaviano | 6,274.17 mi (10,097.30 km) |
| Citrus Heights to Ovada | 5,890.30 mi (9,479.52 km) |
| Citrus Heights to Ozieri | 6,125.70 mi (9,858.36 km) |
| Citrus Heights to Paceco | 6,382.06 mi (10,270.94 km) |
