| Grand Forks to Octeville | 4,033.75 mi (6,491.69 km) |
| Grand Forks to Oignies | 4,155.66 mi (6,687.90 km) |
| Grand Forks to Oissel | 4,141.31 mi (6,664.80 km) |
| Grand Forks to Olivet | 4,235.74 mi (6,816.76 km) |
| Grand Forks to Ollioules | 4,597.71 mi (7,399.30 km) |
| Grand Forks to Olonne-sur-Mer | 4,163.83 mi (6,701.04 km) |
| Grand Forks to Oloron-Sainte-Marie | 4,357.80 mi (7,013.20 km) |
| Grand Forks to Onet Village | 4,421.77 mi (7,116.15 km) |
| Grand Forks to Onnaing | 4,179.52 mi (6,726.28 km) |
| Grand Forks to Orange | 4,512.41 mi (7,262.03 km) |
| Grand Forks to Orchies | 4,163.79 mi (6,700.98 km) |
| Grand Forks to Orleans | 4,234.28 mi (6,814.42 km) |
| Grand Forks to Orly | 4,212.97 mi (6,780.12 km) |
| Grand Forks to Ormesson-sur-Marne | 4,216.08 mi (6,785.13 km) |
| Grand Forks to Orsay | 4,207.96 mi (6,772.06 km) |
