| Wyoming to Oerlinghausen | 4,138.02 mi (6,659.49 km) |
| Wyoming to Oestrich-Winkel | 4,186.95 mi (6,738.24 km) |
| Wyoming to Offenburg | 4,242.57 mi (6,827.75 km) |
| Wyoming to Oftersheim | 4,232.65 mi (6,811.79 km) |
| Wyoming to Ohrdruf | 4,255.63 mi (6,848.78 km) |
| Wyoming to Ohringen | 4,273.47 mi (6,877.49 km) |
| Wyoming to Olbernhau | 4,355.22 mi (7,009.05 km) |
| Wyoming to Olching | 4,380.94 mi (7,050.44 km) |
| Wyoming to Oldenburg | 4,078.83 mi (6,564.24 km) |
| Wyoming to Oldenburg in Holstein | 4,128.93 mi (6,644.87 km) |
| Wyoming to Olfen | 4,100.76 mi (6,599.53 km) |
| Wyoming to Olpe | 4,142.88 mi (6,667.32 km) |
| Wyoming to Olsberg | 4,154.27 mi (6,685.65 km) |
| Wyoming to Oranienburg | 4,268.59 mi (6,869.62 km) |
| Wyoming to Ortenberg | 4,212.59 mi (6,779.51 km) |
