| Frederick to Octeville | 3,636.75 mi (5,852.79 km) |
| Frederick to Oignies | 3,808.59 mi (6,129.33 km) |
| Frederick to Oissel | 3,758.60 mi (6,048.89 km) |
| Frederick to Olivet | 3,831.34 mi (6,165.95 km) |
| Frederick to Ollioules | 4,143.50 mi (6,668.32 km) |
| Frederick to Olonne-sur-Mer | 3,706.54 mi (5,965.09 km) |
| Frederick to Oloron-Sainte-Marie | 3,849.69 mi (6,195.49 km) |
| Frederick to Onet Village | 3,960.41 mi (6,373.66 km) |
| Frederick to Onnaing | 3,835.36 mi (6,172.42 km) |
| Frederick to Orange | 4,065.88 mi (6,543.41 km) |
| Frederick to Orchies | 3,818.67 mi (6,145.55 km) |
| Frederick to Orleans | 3,830.67 mi (6,164.86 km) |
| Frederick to Orly | 3,828.73 mi (6,161.74 km) |
| Frederick to Ormesson-sur-Marne | 3,833.73 mi (6,169.80 km) |
| Frederick to Orsay | 3,821.30 mi (6,149.79 km) |
