| Truckee to Orbetello | 6,018.69 mi (9,686.15 km) |
| Truckee to Oria | 6,313.45 mi (10,160.51 km) |
| Truckee to Oristano | 6,079.03 mi (9,783.25 km) |
| Truckee to Orta Nova | 6,211.67 mi (9,996.71 km) |
| Truckee to Orte | 6,051.94 mi (9,739.66 km) |
| Truckee to Ortona | 6,115.84 mi (9,842.50 km) |
| Truckee to Orvieto | 6,029.30 mi (9,703.21 km) |
| Truckee to Orzinuovi | 5,815.77 mi (9,359.58 km) |
| Truckee to Osimo | 6,024.97 mi (9,696.25 km) |
| Truckee to Ospitaletto | 5,811.17 mi (9,352.17 km) |
| Truckee to Ostuni | 6,298.31 mi (10,136.16 km) |
| Truckee to Ottaviano | 6,204.57 mi (9,985.29 km) |
| Truckee to Ovada | 5,820.11 mi (9,366.56 km) |
| Truckee to Ozieri | 6,054.61 mi (9,743.96 km) |
| Truckee to Paceco | 6,311.26 mi (10,156.98 km) |
