| Kempston to Olympia Heights (Florida) | 4,414.23 mi (7,104.01 km) |
| Kempston to Omaha (Nebraska) | 4,255.27 mi (6,848.20 km) |
| Kempston to On Top of the World Designated Place (Florida) | 4,323.79 mi (6,958.46 km) |
| Kempston to Onalaska (Wisconsin) | 3,952.40 mi (6,360.77 km) |
| Kempston to Oneida (New York) | 3,397.01 mi (5,466.96 km) |
| Kempston to Oneonta (New York) | 3,400.06 mi (5,471.86 km) |
| Kempston to Ontario (California) | 5,381.25 mi (8,660.28 km) |
| Kempston to Ontario (Oregon) | 4,795.96 mi (7,718.36 km) |
| Kempston to Opa-locka (Florida) | 4,401.75 mi (7,083.93 km) |
| Kempston to Opelika (Alabama) | 4,272.15 mi (6,875.36 km) |
| Kempston to Opelousas (Louisiana) | 4,648.56 mi (7,481.13 km) |
| Kempston to Orange (California) | 5,401.64 mi (8,693.10 km) |
| Kempston to Orange (Texas) | 4,735.71 mi (7,621.39 km) |
| Kempston to Orange City (Florida) | 4,291.05 mi (6,905.77 km) |
| Kempston to Orangeburg (South Carolina) | 4,048.01 mi (6,514.64 km) |
