| Wallasey to Olympia Heights (Florida) | 4,297.43 mi (6,916.05 km) |
| Wallasey to Omaha (Nebraska) | 4,118.58 mi (6,628.22 km) |
| Wallasey to On Top of the World Designated Place (Florida) | 4,202.04 mi (6,762.53 km) |
| Wallasey to Onalaska (Wisconsin) | 3,816.03 mi (6,141.31 km) |
| Wallasey to Oneida (New York) | 3,267.23 mi (5,258.10 km) |
| Wallasey to Oneonta (New York) | 3,271.17 mi (5,264.44 km) |
| Wallasey to Ontario (California) | 5,242.54 mi (8,437.05 km) |
| Wallasey to Ontario (Oregon) | 4,657.82 mi (7,496.03 km) |
| Wallasey to Opa-locka (Florida) | 4,284.86 mi (6,895.82 km) |
| Wallasey to Opelika (Alabama) | 4,145.10 mi (6,670.89 km) |
| Wallasey to Opelousas (Louisiana) | 4,518.68 mi (7,272.11 km) |
| Wallasey to Orange (California) | 5,262.93 mi (8,469.87 km) |
| Wallasey to Orange (Texas) | 4,605.08 mi (7,411.17 km) |
| Wallasey to Orange City (Florida) | 4,170.32 mi (6,711.48 km) |
| Wallasey to Orangeburg (South Carolina) | 3,923.49 mi (6,314.25 km) |
