| Napa to Oerlinghausen | 5,537.61 mi (8,911.92 km) |
| Napa to Oestrich-Winkel | 5,628.48 mi (9,058.17 km) |
| Napa to Offenburg | 5,711.04 mi (9,191.04 km) |
| Napa to Oftersheim | 5,678.94 mi (9,139.37 km) |
| Napa to Ohrdruf | 5,653.69 mi (9,098.73 km) |
| Napa to Ohringen | 5,712.94 mi (9,194.09 km) |
| Napa to Olbernhau | 5,727.26 mi (9,217.14 km) |
| Napa to Olching | 5,817.28 mi (9,362.01 km) |
| Napa to Oldenburg | 5,461.32 mi (8,789.15 km) |
| Napa to Oldenburg in Holstein | 5,462.13 mi (8,790.45 km) |
| Napa to Olfen | 5,518.05 mi (8,880.44 km) |
| Napa to Olpe | 5,568.20 mi (8,961.15 km) |
| Napa to Olsberg | 5,566.91 mi (8,959.07 km) |
| Napa to Oranienburg | 5,604.95 mi (9,020.29 km) |
| Napa to Ortenberg | 5,636.86 mi (9,071.65 km) |
