| Elkridge to Octeville | 3,618.54 mi (5,823.48 km) |
| Elkridge to Oignies | 3,791.78 mi (6,102.27 km) |
| Elkridge to Oissel | 3,740.65 mi (6,020.00 km) |
| Elkridge to Olivet | 3,812.52 mi (6,135.66 km) |
| Elkridge to Ollioules | 4,122.48 mi (6,634.49 km) |
| Elkridge to Olonne-sur-Mer | 3,686.12 mi (5,932.24 km) |
| Elkridge to Oloron-Sainte-Marie | 3,827.31 mi (6,159.47 km) |
| Elkridge to Onet Village | 3,939.43 mi (6,339.90 km) |
| Elkridge to Onnaing | 3,818.60 mi (6,145.44 km) |
| Elkridge to Orange | 4,045.24 mi (6,510.18 km) |
| Elkridge to Orchies | 3,801.91 mi (6,118.58 km) |
| Elkridge to Orleans | 3,811.87 mi (6,134.62 km) |
| Elkridge to Orly | 3,810.60 mi (6,132.57 km) |
| Elkridge to Ormesson-sur-Marne | 3,815.66 mi (6,140.71 km) |
| Elkridge to Orsay | 3,803.10 mi (6,120.50 km) |
