| Alfter to Olympia Heights (Florida) | 4,750.21 mi (7,644.72 km) |
| Alfter to Omaha (Nebraska) | 4,575.93 mi (7,364.24 km) |
| Alfter to On Top of the World Designated Place (Florida) | 4,660.72 mi (7,500.70 km) |
| Alfter to Onalaska (Wisconsin) | 4,274.45 mi (6,879.06 km) |
| Alfter to Oneida (New York) | 3,731.18 mi (6,004.76 km) |
| Alfter to Oneonta (New York) | 3,734.91 mi (6,010.76 km) |
| Alfter to Ontario (California) | 5,680.49 mi (9,141.87 km) |
| Alfter to Ontario (Oregon) | 5,079.64 mi (8,174.89 km) |
| Alfter to Opa-locka (Florida) | 4,737.76 mi (7,624.69 km) |
| Alfter to Opelika (Alabama) | 4,608.08 mi (7,415.99 km) |
| Alfter to Opelousas (Louisiana) | 4,982.66 mi (8,018.82 km) |
| Alfter to Orange (California) | 5,700.82 mi (9,174.59 km) |
| Alfter to Orange (Texas) | 5,069.11 mi (8,157.94 km) |
| Alfter to Orange City (Florida) | 4,627.91 mi (7,447.90 km) |
| Alfter to Orangeburg (South Carolina) | 4,384.73 mi (7,056.55 km) |
