| Cannock to Olympia Heights (Florida) | 4,344.64 mi (6,992.02 km) |
| Cannock to Omaha (Nebraska) | 4,179.46 mi (6,726.19 km) |
| Cannock to On Top of the World Designated Place (Florida) | 4,252.26 mi (6,843.36 km) |
| Cannock to Onalaska (Wisconsin) | 3,876.60 mi (6,238.79 km) |
| Cannock to Oneida (New York) | 3,322.68 mi (5,347.33 km) |
| Cannock to Oneonta (New York) | 3,326.00 mi (5,352.68 km) |
| Cannock to Ontario (California) | 5,306.30 mi (8,539.67 km) |
| Cannock to Ontario (Oregon) | 4,722.49 mi (7,600.11 km) |
| Cannock to Opa-locka (Florida) | 4,332.12 mi (6,971.88 km) |
| Cannock to Opelika (Alabama) | 4,198.72 mi (6,757.19 km) |
| Cannock to Opelousas (Louisiana) | 4,574.22 mi (7,361.50 km) |
| Cannock to Orange (California) | 5,326.70 mi (8,572.50 km) |
| Cannock to Orange (Texas) | 4,661.15 mi (7,501.40 km) |
| Cannock to Orange City (Florida) | 4,219.91 mi (6,791.29 km) |
| Cannock to Orangeburg (South Carolina) | 3,975.45 mi (6,397.87 km) |
