| Ukiah to Octeville | 5,348.54 mi (8,607.64 km) |
| Ukiah to Oignies | 5,440.05 mi (8,754.92 km) |
| Ukiah to Oissel | 5,444.88 mi (8,762.69 km) |
| Ukiah to Olivet | 5,546.60 mi (8,926.38 km) |
| Ukiah to Ollioules | 5,920.83 mi (9,528.65 km) |
| Ukiah to Olonne-sur-Mer | 5,502.10 mi (8,854.78 km) |
| Ukiah to Oloron-Sainte-Marie | 5,712.43 mi (9,193.27 km) |
| Ukiah to Onet Village | 5,753.83 mi (9,259.90 km) |
| Ukiah to Onnaing | 5,461.30 mi (8,789.11 km) |
| Ukiah to Orange | 5,834.50 mi (9,389.73 km) |
| Ukiah to Orchies | 5,446.78 mi (8,765.75 km) |
| Ukiah to Orleans | 5,544.81 mi (8,923.50 km) |
| Ukiah to Orly | 5,514.51 mi (8,874.75 km) |
| Ukiah to Ormesson-sur-Marne | 5,516.53 mi (8,878.00 km) |
| Ukiah to Orsay | 5,510.94 mi (8,869.00 km) |
