| Watsonville to Oerlinghausen | 5,607.67 mi (9,024.68 km) |
| Watsonville to Oestrich-Winkel | 5,696.61 mi (9,167.81 km) |
| Watsonville to Offenburg | 5,777.92 mi (9,298.66 km) |
| Watsonville to Oftersheim | 5,746.96 mi (9,248.84 km) |
| Watsonville to Ohrdruf | 5,724.19 mi (9,212.19 km) |
| Watsonville to Ohringen | 5,781.43 mi (9,304.32 km) |
| Watsonville to Olbernhau | 5,799.29 mi (9,333.06 km) |
| Watsonville to Olching | 5,886.26 mi (9,473.02 km) |
| Watsonville to Oldenburg | 5,532.01 mi (8,902.91 km) |
| Watsonville to Oldenburg in Holstein | 5,535.20 mi (8,908.05 km) |
| Watsonville to Olfen | 5,587.13 mi (8,991.62 km) |
| Watsonville to Olpe | 5,637.01 mi (9,071.89 km) |
| Watsonville to Olsberg | 5,636.38 mi (9,070.88 km) |
| Watsonville to Oranienburg | 5,678.32 mi (9,138.38 km) |
| Watsonville to Ortenberg | 5,705.94 mi (9,182.82 km) |
