| Cedar Rapids to Octeville | 4,103.68 mi (6,604.23 km) |
| Cedar Rapids to Oignies | 4,249.04 mi (6,838.16 km) |
| Cedar Rapids to Oissel | 4,218.95 mi (6,789.75 km) |
| Cedar Rapids to Olivet | 4,305.00 mi (6,928.24 km) |
| Cedar Rapids to Ollioules | 4,648.80 mi (7,481.52 km) |
| Cedar Rapids to Olonne-sur-Mer | 4,208.46 mi (6,772.86 km) |
| Cedar Rapids to Oloron-Sainte-Marie | 4,381.38 mi (7,051.15 km) |
| Cedar Rapids to Onet Village | 4,467.62 mi (7,189.95 km) |
| Cedar Rapids to Onnaing | 4,274.46 mi (6,879.08 km) |
| Cedar Rapids to Orange | 4,566.05 mi (7,348.34 km) |
| Cedar Rapids to Orchies | 4,258.12 mi (6,852.78 km) |
| Cedar Rapids to Orleans | 4,303.88 mi (6,926.42 km) |
| Cedar Rapids to Orly | 4,290.86 mi (6,905.47 km) |
| Cedar Rapids to Ormesson-sur-Marne | 4,294.84 mi (6,911.88 km) |
| Cedar Rapids to Orsay | 4,284.72 mi (6,895.59 km) |
