| Wittmund to Olympia Heights (Florida) | 4,731.65 mi (7,614.85 km) |
| Wittmund to Omaha (Nebraska) | 4,485.26 mi (7,218.33 km) |
| Wittmund to On Top of the World Designated Place (Florida) | 4,629.03 mi (7,449.70 km) |
| Wittmund to Onalaska (Wisconsin) | 4,186.79 mi (6,738.00 km) |
| Wittmund to Oneida (New York) | 3,675.51 mi (5,915.16 km) |
| Wittmund to Oneonta (New York) | 3,682.37 mi (5,926.21 km) |
| Wittmund to Ontario (California) | 5,560.32 mi (8,948.47 km) |
| Wittmund to Ontario (Oregon) | 4,946.39 mi (7,960.45 km) |
| Wittmund to Opa-locka (Florida) | 4,718.98 mi (7,594.46 km) |
| Wittmund to Opelika (Alabama) | 4,560.31 mi (7,339.11 km) |
| Wittmund to Opelousas (Louisiana) | 4,924.40 mi (7,925.05 km) |
| Wittmund to Orange (California) | 5,580.55 mi (8,981.03 km) |
| Wittmund to Orange (Texas) | 5,007.83 mi (8,059.33 km) |
| Wittmund to Orange City (Florida) | 4,599.07 mi (7,401.49 km) |
| Wittmund to Orangeburg (South Carolina) | 4,345.24 mi (6,993.00 km) |
