| Tourcoing to Olympia Heights (Florida) | 4,586.92 mi (7,381.94 km) |
| Tourcoing to Omaha (Nebraska) | 4,439.73 mi (7,145.06 km) |
| Tourcoing to On Top of the World Designated Place (Florida) | 4,500.56 mi (7,242.96 km) |
| Tourcoing to Onalaska (Wisconsin) | 4,136.92 mi (6,657.73 km) |
| Tourcoing to Oneida (New York) | 3,579.44 mi (5,760.55 km) |
| Tourcoing to Oneonta (New York) | 3,581.98 mi (5,764.64 km) |
| Tourcoing to Ontario (California) | 5,562.37 mi (8,951.77 km) |
| Tourcoing to Ontario (Oregon) | 4,972.90 mi (8,003.11 km) |
| Tourcoing to Opa-locka (Florida) | 4,574.52 mi (7,361.98 km) |
| Tourcoing to Opelika (Alabama) | 4,452.80 mi (7,166.09 km) |
| Tourcoing to Opelousas (Louisiana) | 4,830.92 mi (7,774.62 km) |
| Tourcoing to Orange (California) | 5,582.75 mi (8,984.57 km) |
| Tourcoing to Orange (Texas) | 4,918.48 mi (7,915.53 km) |
| Tourcoing to Orange City (Florida) | 4,467.03 mi (7,188.99 km) |
| Tourcoing to Orangeburg (South Carolina) | 4,226.94 mi (6,802.60 km) |
