| Wyoming to Orbetello | 4,614.57 mi (7,426.43 km) |
| Wyoming to Oria | 4,956.15 mi (7,976.15 km) |
| Wyoming to Oristano | 4,613.01 mi (7,423.93 km) |
| Wyoming to Orta Nova | 4,842.67 mi (7,793.53 km) |
| Wyoming to Orte | 4,660.85 mi (7,500.92 km) |
| Wyoming to Ortona | 4,745.75 mi (7,637.54 km) |
| Wyoming to Orvieto | 4,638.81 mi (7,465.44 km) |
| Wyoming to Orzinuovi | 4,440.98 mi (7,147.06 km) |
| Wyoming to Osimo | 4,660.50 mi (7,500.35 km) |
| Wyoming to Ospitaletto | 4,440.16 mi (7,145.75 km) |
| Wyoming to Ostuni | 4,943.54 mi (7,955.85 km) |
| Wyoming to Ottaviano | 4,814.77 mi (7,748.62 km) |
| Wyoming to Ovada | 4,420.74 mi (7,114.49 km) |
| Wyoming to Ozieri | 4,601.84 mi (7,405.94 km) |
| Wyoming to Paceco | 4,862.13 mi (7,824.84 km) |
