| Glen Rock to Octeville | 3,434.63 mi (5,527.50 km) |
| Glen Rock to Oignies | 3,607.43 mi (5,805.59 km) |
| Glen Rock to Oissel | 3,556.64 mi (5,723.86 km) |
| Glen Rock to Olivet | 3,628.90 mi (5,840.16 km) |
| Glen Rock to Ollioules | 3,940.43 mi (6,341.52 km) |
| Glen Rock to Olonne-sur-Mer | 3,503.55 mi (5,638.43 km) |
| Glen Rock to Oloron-Sainte-Marie | 3,646.68 mi (5,868.77 km) |
| Glen Rock to Onet Village | 3,757.35 mi (6,046.86 km) |
| Glen Rock to Onnaing | 3,634.24 mi (5,848.74 km) |
| Glen Rock to Orange | 3,862.86 mi (6,216.68 km) |
| Glen Rock to Orchies | 3,617.55 mi (5,821.88 km) |
| Glen Rock to Orleans | 3,628.24 mi (5,839.09 km) |
| Glen Rock to Orly | 3,626.66 mi (5,836.54 km) |
| Glen Rock to Ormesson-sur-Marne | 3,631.70 mi (5,844.65 km) |
| Glen Rock to Orsay | 3,619.19 mi (5,824.52 km) |
