| Cockermouth to Olympia Heights (Florida) | 4,274.74 mi (6,879.52 km) |
| Cockermouth to Omaha (Nebraska) | 4,064.74 mi (6,541.57 km) |
| Cockermouth to On Top of the World Designated Place (Florida) | 4,173.51 mi (6,716.62 km) |
| Cockermouth to Onalaska (Wisconsin) | 3,763.21 mi (6,056.30 km) |
| Cockermouth to Oneida (New York) | 3,227.91 mi (5,194.82 km) |
| Cockermouth to Oneonta (New York) | 3,233.26 mi (5,203.42 km) |
| Cockermouth to Ontario (California) | 5,177.94 mi (8,333.09 km) |
| Cockermouth to Ontario (Oregon) | 4,587.85 mi (7,383.43 km) |
| Cockermouth to Opa-locka (Florida) | 4,262.07 mi (6,859.15 km) |
| Cockermouth to Opelika (Alabama) | 4,109.49 mi (6,613.58 km) |
| Cockermouth to Opelousas (Louisiana) | 4,478.62 mi (7,207.64 km) |
| Cockermouth to Orange (California) | 5,198.31 mi (8,365.88 km) |
| Cockermouth to Orange (Texas) | 4,563.77 mi (7,344.68 km) |
| Cockermouth to Orange City (Florida) | 4,143.06 mi (6,667.61 km) |
| Cockermouth to Orangeburg (South Carolina) | 3,891.51 mi (6,262.78 km) |
