| Wil to Olympia Heights (Florida) | 4,902.43 mi (7,889.70 km) |
| Wil to Omaha (Nebraska) | 4,787.71 mi (7,705.08 km) |
| Wil to On Top of the World Designated Place (Florida) | 4,825.40 mi (7,765.73 km) |
| Wil to Onalaska (Wisconsin) | 4,484.63 mi (7,217.31 km) |
| Wil to Oneida (New York) | 3,918.72 mi (6,306.57 km) |
| Wil to Oneonta (New York) | 3,919.91 mi (6,308.49 km) |
| Wil to Ontario (California) | 5,909.14 mi (9,509.84 km) |
| Wil to Ontario (Oregon) | 5,314.96 mi (8,553.60 km) |
| Wil to Opa-locka (Florida) | 4,890.22 mi (7,870.05 km) |
| Wil to Opelika (Alabama) | 4,787.02 mi (7,703.96 km) |
| Wil to Opelousas (Louisiana) | 5,169.57 mi (8,319.62 km) |
| Wil to Orange (California) | 5,929.51 mi (9,542.62 km) |
| Wil to Orange (Texas) | 5,258.30 mi (8,462.41 km) |
| Wil to Orange City (Florida) | 4,790.07 mi (7,708.88 km) |
| Wil to Orangeburg (South Carolina) | 4,557.06 mi (7,333.87 km) |
