| Napa to Oberkirch | 5,711.52 mi (9,191.80 km) |
| Napa to Obernburg am Main | 5,667.78 mi (9,121.41 km) |
| Napa to Obernkirchen | 5,532.51 mi (8,903.71 km) |
| Napa to Oberschleissheim | 5,821.00 mi (9,368.00 km) |
| Napa to Oberstdorf | 5,834.20 mi (9,389.23 km) |
| Napa to Obertraubling | 5,795.75 mi (9,327.36 km) |
| Napa to Obertshausen | 5,647.04 mi (9,088.03 km) |
| Napa to Oberursel | 5,632.68 mi (9,064.92 km) |
| Napa to Ochsenfurt | 5,702.73 mi (9,177.66 km) |
| Napa to Ochsenhausen | 5,788.03 mi (9,314.93 km) |
| Napa to Ochtrup | 5,486.35 mi (8,829.43 km) |
| Napa to Odenthal | 5,548.24 mi (8,929.03 km) |
| Napa to Oelde | 5,531.65 mi (8,902.34 km) |
| Napa to Oelsnitz | 5,712.96 mi (9,194.12 km) |
| Napa to Oer-Erkenschwick | 5,518.62 mi (8,881.37 km) |
