| Welby to Octeville | 4,703.22 mi (7,569.10 km) |
| Welby to Oignies | 4,830.59 mi (7,774.08 km) |
| Welby to Oissel | 4,812.87 mi (7,745.56 km) |
| Welby to Olivet | 4,905.42 mi (7,894.51 km) |
| Welby to Ollioules | 5,263.06 mi (8,470.07 km) |
| Welby to Olonne-sur-Mer | 4,826.33 mi (7,767.22 km) |
| Welby to Oloron-Sainte-Marie | 5,013.50 mi (8,068.44 km) |
| Welby to Onet Village | 5,085.18 mi (8,183.81 km) |
| Welby to Onnaing | 4,854.77 mi (7,813.00 km) |
| Welby to Orange | 5,178.35 mi (8,333.75 km) |
| Welby to Orchies | 4,838.91 mi (7,787.47 km) |
| Welby to Orleans | 4,904.04 mi (7,892.30 km) |
| Welby to Orly | 4,884.71 mi (7,861.17 km) |
| Welby to Ormesson-sur-Marne | 4,888.02 mi (7,866.51 km) |
| Welby to Orsay | 4,879.43 mi (7,852.68 km) |
