| Wallingford Center to Oberkirch | 3,795.58 mi (6,108.40 km) |
| Wallingford Center to Obernburg am Main | 3,800.45 mi (6,116.23 km) |
| Wallingford Center to Obernkirchen | 3,730.64 mi (6,003.89 km) |
| Wallingford Center to Oberschleissheim | 3,947.50 mi (6,352.89 km) |
| Wallingford Center to Oberstdorf | 3,921.00 mi (6,310.24 km) |
| Wallingford Center to Obertraubling | 3,949.16 mi (6,355.55 km) |
| Wallingford Center to Obertshausen | 3,781.43 mi (6,085.62 km) |
| Wallingford Center to Oberursel | 3,767.18 mi (6,062.68 km) |
| Wallingford Center to Ochsenfurt | 3,843.40 mi (6,185.35 km) |
| Wallingford Center to Ochsenhausen | 3,886.59 mi (6,254.86 km) |
| Wallingford Center to Ochtrup | 3,657.13 mi (5,885.59 km) |
| Wallingford Center to Odenthal | 3,685.47 mi (5,931.20 km) |
| Wallingford Center to Oelde | 3,704.71 mi (5,962.16 km) |
| Wallingford Center to Oelsnitz | 3,903.85 mi (6,282.63 km) |
| Wallingford Center to Oer-Erkenschwick | 3,674.43 mi (5,913.42 km) |
