| Willow Grove to Octeville | 3,509.89 mi (5,648.62 km) |
| Willow Grove to Oignies | 3,683.20 mi (5,927.55 km) |
| Willow Grove to Oissel | 3,632.00 mi (5,845.15 km) |
| Willow Grove to Olivet | 3,703.89 mi (5,960.83 km) |
| Willow Grove to Ollioules | 4,014.21 mi (6,460.25 km) |
| Willow Grove to Olonne-sur-Mer | 3,577.70 mi (5,757.75 km) |
| Willow Grove to Oloron-Sainte-Marie | 3,719.51 mi (5,985.98 km) |
| Willow Grove to Onet Village | 3,831.15 mi (6,165.64 km) |
| Willow Grove to Onnaing | 3,710.04 mi (5,970.72 km) |
| Willow Grove to Orange | 3,936.87 mi (6,335.78 km) |
| Willow Grove to Orchies | 3,693.34 mi (5,943.86 km) |
| Willow Grove to Orleans | 3,703.24 mi (5,959.78 km) |
| Willow Grove to Orly | 3,701.95 mi (5,957.71 km) |
| Willow Grove to Ormesson-sur-Marne | 3,707.01 mi (5,965.85 km) |
| Willow Grove to Orsay | 3,694.45 mi (5,945.64 km) |
