| The Dalles to Octeville | 4,924.96 mi (7,925.96 km) |
| The Dalles to Oignies | 5,008.13 mi (8,059.81 km) |
| The Dalles to Oissel | 5,017.72 mi (8,075.24 km) |
| The Dalles to Olivet | 5,120.99 mi (8,241.44 km) |
| The Dalles to Ollioules | 5,497.25 mi (8,846.98 km) |
| The Dalles to Olonne-sur-Mer | 5,085.43 mi (8,184.20 km) |
| The Dalles to Oloron-Sainte-Marie | 5,301.10 mi (8,531.30 km) |
| The Dalles to Onet Village | 5,333.86 mi (8,584.02 km) |
| The Dalles to Onnaing | 5,028.69 mi (8,092.89 km) |
| The Dalles to Orange | 5,410.98 mi (8,708.12 km) |
| The Dalles to Orchies | 5,014.50 mi (8,070.07 km) |
| The Dalles to Orleans | 5,119.12 mi (8,238.42 km) |
| The Dalles to Orly | 5,086.51 mi (8,185.95 km) |
| The Dalles to Ormesson-sur-Marne | 5,088.23 mi (8,188.72 km) |
| The Dalles to Orsay | 5,083.33 mi (8,180.83 km) |
