| Syston to Olympia Heights (Florida) | 4,383.82 mi (7,055.08 km) |
| Syston to Omaha (Nebraska) | 4,213.20 mi (6,780.50 km) |
| Syston to On Top of the World Designated Place (Florida) | 4,290.93 mi (6,905.58 km) |
| Syston to Onalaska (Wisconsin) | 3,910.62 mi (6,293.53 km) |
| Syston to Oneida (New York) | 3,359.74 mi (5,406.98 km) |
| Syston to Oneonta (New York) | 3,363.31 mi (5,412.72 km) |
| Syston to Ontario (California) | 5,336.20 mi (8,587.78 km) |
| Syston to Ontario (Oregon) | 4,749.71 mi (7,643.92 km) |
| Syston to Opa-locka (Florida) | 4,371.30 mi (7,034.93 km) |
| Syston to Opelika (Alabama) | 4,236.47 mi (6,817.94 km) |
| Syston to Opelousas (Louisiana) | 4,611.26 mi (7,421.11 km) |
| Syston to Orange (California) | 5,356.59 mi (8,620.59 km) |
| Syston to Orange (Texas) | 4,697.97 mi (7,560.65 km) |
| Syston to Orange City (Florida) | 4,258.70 mi (6,853.72 km) |
| Syston to Orangeburg (South Carolina) | 4,013.69 mi (6,459.42 km) |
