| Vandalia to Olympia (Washington) | 1,981.26 mi (3,188.53 km) |
| Vandalia to Olympia Heights (Florida) | 1,003.02 mi (1,614.21 km) |
| Vandalia to Omaha (Nebraska) | 629.23 mi (1,012.65 km) |
| Vandalia to On Top of the World Designated Place (Florida) | 752.18 mi (1,210.52 km) |
| Vandalia to Onalaska (Wisconsin) | 454.62 mi (731.63 km) |
| Vandalia to Oneida (New York) | 493.46 mi (794.14 km) |
| Vandalia to Oneonta (New York) | 506.63 mi (815.35 km) |
| Vandalia to Ontario (California) | 1,876.82 mi (3,020.45 km) |
| Vandalia to Ontario (Oregon) | 1,697.20 mi (2,731.37 km) |
| Vandalia to Opa-locka (Florida) | 992.24 mi (1,596.85 km) |
| Vandalia to Opelika (Alabama) | 503.04 mi (809.56 km) |
| Vandalia to Opelousas (Louisiana) | 784.12 mi (1,261.92 km) |
| Vandalia to Orange (California) | 1,894.45 mi (3,048.82 km) |
| Vandalia to Orange (Texas) | 863.52 mi (1,389.71 km) |
| Vandalia to Orange City (Florida) | 773.97 mi (1,245.58 km) |
