| Troutdale to Octeville | 4,963.42 mi (7,987.86 km) |
| Troutdale to Oignies | 5,044.20 mi (8,117.86 km) |
| Troutdale to Oissel | 5,055.18 mi (8,135.53 km) |
| Troutdale to Olivet | 5,158.85 mi (8,302.37 km) |
| Troutdale to Ollioules | 5,535.53 mi (8,908.57 km) |
| Troutdale to Olonne-sur-Mer | 5,125.51 mi (8,248.71 km) |
| Troutdale to Oloron-Sainte-Marie | 5,342.29 mi (8,597.59 km) |
| Troutdale to Onet Village | 5,373.09 mi (8,647.15 km) |
| Troutdale to Onnaing | 5,064.54 mi (8,150.59 km) |
| Troutdale to Orange | 5,449.29 mi (8,769.78 km) |
| Troutdale to Orchies | 5,050.46 mi (8,127.94 km) |
| Troutdale to Orleans | 5,156.95 mi (8,299.31 km) |
| Troutdale to Orly | 5,123.72 mi (8,245.82 km) |
| Troutdale to Ormesson-sur-Marne | 5,125.35 mi (8,248.46 km) |
| Troutdale to Orsay | 5,120.65 mi (8,240.88 km) |
