| Ada to Octeville | 1,042.23 mi (1,677.30 km) |
| Ada to Oignies | 851.17 mi (1,369.83 km) |
| Ada to Oissel | 917.99 mi (1,477.36 km) |
| Ada to Olivet | 871.45 mi (1,402.46 km) |
| Ada to Ollioules | 726.90 mi (1,169.83 km) |
| Ada to Olonne-sur-Mer | 1,046.08 mi (1,683.50 km) |
| Ada to Oloron-Sainte-Marie | 1,034.82 mi (1,665.38 km) |
| Ada to Onet Village | 859.65 mi (1,383.47 km) |
| Ada to Onnaing | 824.04 mi (1,326.17 km) |
| Ada to Orange | 756.60 mi (1,217.62 km) |
| Ada to Orchies | 840.67 mi (1,352.93 km) |
| Ada to Orleans | 871.19 mi (1,402.04 km) |
| Ada to Orly | 854.06 mi (1,374.47 km) |
| Ada to Ormesson-sur-Marne | 847.85 mi (1,364.48 km) |
| Ada to Orsay | 862.97 mi (1,388.81 km) |
