| Westhoughton to Olympia Heights (Florida) | 4,316.55 mi (6,946.82 km) |
| Westhoughton to Omaha (Nebraska) | 4,131.70 mi (6,649.32 km) |
| Westhoughton to On Top of the World Designated Place (Florida) | 4,220.31 mi (6,791.94 km) |
| Westhoughton to Onalaska (Wisconsin) | 3,829.40 mi (6,162.82 km) |
| Westhoughton to Oneida (New York) | 3,283.58 mi (5,284.42 km) |
| Westhoughton to Oneonta (New York) | 3,287.79 mi (5,291.19 km) |
| Westhoughton to Ontario (California) | 5,252.48 mi (8,453.05 km) |
| Westhoughton to Ontario (Oregon) | 4,665.77 mi (7,508.83 km) |
| Westhoughton to Opa-locka (Florida) | 4,303.97 mi (6,926.58 km) |
| Westhoughton to Opelika (Alabama) | 4,162.18 mi (6,698.39 km) |
| Westhoughton to Opelousas (Louisiana) | 4,534.94 mi (7,298.28 km) |
| Westhoughton to Orange (California) | 5,272.87 mi (8,485.86 km) |
| Westhoughton to Orange (Texas) | 4,621.10 mi (7,436.94 km) |
| Westhoughton to Orange City (Florida) | 4,188.78 mi (6,741.19 km) |
| Westhoughton to Orangeburg (South Carolina) | 3,941.19 mi (6,342.74 km) |
