| Wallingford to Oberkirch | 459.60 mi (739.66 km) |
| Wallingford to Obernburg am Main | 464.81 mi (748.04 km) |
| Wallingford to Obernkirchen | 438.42 mi (705.57 km) |
| Wallingford to Oberschleissheim | 609.12 mi (980.28 km) |
| Wallingford to Oberstdorf | 586.95 mi (944.61 km) |
| Wallingford to Obertraubling | 613.40 mi (987.17 km) |
| Wallingford to Obertshausen | 446.88 mi (719.19 km) |
| Wallingford to Oberursel | 433.26 mi (697.27 km) |
| Wallingford to Ochsenfurt | 508.14 mi (817.77 km) |
| Wallingford to Ochsenhausen | 549.58 mi (884.47 km) |
| Wallingford to Ochtrup | 356.76 mi (574.14 km) |
| Wallingford to Odenthal | 357.86 mi (575.92 km) |
| Wallingford to Oelde | 397.10 mi (639.07 km) |
| Wallingford to Oelsnitz | 582.76 mi (937.86 km) |
| Wallingford to Oer-Erkenschwick | 359.12 mi (577.94 km) |
