| Tuscaloosa to Octeville | 4,342.01 mi (6,987.78 km) |
| Tuscaloosa to Oignies | 4,511.73 mi (7,260.92 km) |
| Tuscaloosa to Oissel | 4,463.52 mi (7,183.34 km) |
| Tuscaloosa to Olivet | 4,537.18 mi (7,301.89 km) |
| Tuscaloosa to Ollioules | 4,849.92 mi (7,805.19 km) |
| Tuscaloosa to Olonne-sur-Mer | 4,413.05 mi (7,102.12 km) |
| Tuscaloosa to Oloron-Sainte-Marie | 4,555.10 mi (7,330.73 km) |
| Tuscaloosa to Onet Village | 4,666.84 mi (7,510.55 km) |
| Tuscaloosa to Onnaing | 4,538.40 mi (7,303.84 km) |
| Tuscaloosa to Orange | 4,772.39 mi (7,680.41 km) |
| Tuscaloosa to Orchies | 4,521.72 mi (7,277.00 km) |
| Tuscaloosa to Orleans | 4,536.48 mi (7,300.76 km) |
| Tuscaloosa to Orly | 4,533.86 mi (7,296.54 km) |
| Tuscaloosa to Ormesson-sur-Marne | 4,538.79 mi (7,304.48 km) |
| Tuscaloosa to Orsay | 4,526.51 mi (7,284.71 km) |
