| Montclair to Octeville | 5,457.09 mi (8,782.34 km) |
| Montclair to Oignies | 5,570.29 mi (8,964.52 km) |
| Montclair to Oissel | 5,561.88 mi (8,950.99 km) |
| Montclair to Olivet | 5,658.54 mi (9,106.54 km) |
| Montclair to Ollioules | 6,024.08 mi (9,694.82 km) |
| Montclair to Olonne-sur-Mer | 5,592.30 mi (8,999.94 km) |
| Montclair to Oloron-Sainte-Marie | 5,788.26 mi (9,315.30 km) |
| Montclair to Onet Village | 5,849.56 mi (9,413.95 km) |
| Montclair to Onnaing | 5,593.34 mi (9,001.61 km) |
| Montclair to Orange | 5,938.43 mi (9,556.97 km) |
| Montclair to Orchies | 5,577.97 mi (8,976.88 km) |
| Montclair to Orleans | 5,656.99 mi (9,104.05 km) |
| Montclair to Orly | 5,633.15 mi (9,065.68 km) |
| Montclair to Ormesson-sur-Marne | 5,635.95 mi (9,070.19 km) |
| Montclair to Orsay | 5,628.54 mi (9,058.26 km) |
