| Fort Worth to Octeville | 4,767.46 mi (7,672.49 km) |
| Fort Worth to Oignies | 4,922.46 mi (7,921.93 km) |
| Fort Worth to Oissel | 4,885.57 mi (7,862.56 km) |
| Fort Worth to Olivet | 4,967.05 mi (7,993.69 km) |
| Fort Worth to Ollioules | 5,298.87 mi (8,527.71 km) |
| Fort Worth to Olonne-sur-Mer | 4,858.50 mi (7,819.00 km) |
| Fort Worth to Oloron-Sainte-Marie | 5,017.76 mi (8,075.31 km) |
| Fort Worth to Onet Village | 5,116.21 mi (8,233.75 km) |
| Fort Worth to Onnaing | 4,948.41 mi (7,963.69 km) |
| Fort Worth to Orange | 5,218.14 mi (8,397.78 km) |
| Fort Worth to Orchies | 4,931.89 mi (7,937.11 km) |
| Fort Worth to Orleans | 4,966.09 mi (7,992.14 km) |
| Fort Worth to Orly | 4,957.11 mi (7,977.70 km) |
| Fort Worth to Ormesson-sur-Marne | 4,961.48 mi (7,984.73 km) |
| Fort Worth to Orsay | 4,950.49 mi (7,967.04 km) |
