| College Park to Octeville | 3,635.02 mi (5,850.01 km) |
| College Park to Oignies | 3,808.42 mi (6,129.06 km) |
| College Park to Oissel | 3,757.17 mi (6,046.58 km) |
| College Park to Olivet | 3,828.92 mi (6,162.05 km) |
| College Park to Ollioules | 4,138.53 mi (6,660.32 km) |
| College Park to Olonne-sur-Mer | 3,702.28 mi (5,958.24 km) |
| College Park to Oloron-Sainte-Marie | 3,843.11 mi (6,184.89 km) |
| College Park to Onet Village | 3,955.49 mi (6,365.75 km) |
| College Park to Onnaing | 3,835.25 mi (6,172.24 km) |
| College Park to Orange | 4,061.36 mi (6,536.12 km) |
| College Park to Orchies | 3,818.56 mi (6,145.38 km) |
| College Park to Orleans | 3,828.28 mi (6,161.01 km) |
| College Park to Orly | 3,827.09 mi (6,159.11 km) |
| College Park to Ormesson-sur-Marne | 3,832.16 mi (6,167.27 km) |
| College Park to Orsay | 3,819.58 mi (6,147.03 km) |
