| Mason to Octeville | 3,926.60 mi (6,319.26 km) |
| Mason to Oignies | 4,089.01 mi (6,580.62 km) |
| Mason to Oissel | 4,046.44 mi (6,512.12 km) |
| Mason to Olivet | 4,124.49 mi (6,637.73 km) |
| Mason to Ollioules | 4,449.33 mi (7,160.51 km) |
| Mason to Olonne-sur-Mer | 4,009.71 mi (6,453.01 km) |
| Mason to Oloron-Sainte-Marie | 4,164.04 mi (6,701.38 km) |
| Mason to Onet Village | 4,266.36 mi (6,866.05 km) |
| Mason to Onnaing | 4,115.37 mi (6,623.05 km) |
| Mason to Orange | 4,369.62 mi (7,032.22 km) |
| Mason to Orchies | 4,098.75 mi (6,596.29 km) |
| Mason to Orleans | 4,123.64 mi (6,636.36 km) |
| Mason to Orly | 4,117.52 mi (6,626.51 km) |
| Mason to Ormesson-sur-Marne | 4,122.16 mi (6,633.97 km) |
| Mason to Orsay | 4,110.55 mi (6,615.29 km) |
