| Tralee to Oberkirch | 821.96 mi (1,322.81 km) |
| Tralee to Obernburg am Main | 832.63 mi (1,339.99 km) |
| Tralee to Obernkirchen | 793.29 mi (1,276.67 km) |
| Tralee to Oberschleissheim | 975.35 mi (1,569.67 km) |
| Tralee to Oberstdorf | 947.53 mi (1,524.90 km) |
| Tralee to Obertraubling | 981.16 mi (1,579.02 km) |
| Tralee to Obertshausen | 814.70 mi (1,311.13 km) |
| Tralee to Oberursel | 801.02 mi (1,289.12 km) |
| Tralee to Ochsenfurt | 875.97 mi (1,409.73 km) |
| Tralee to Ochsenhausen | 913.04 mi (1,469.40 km) |
| Tralee to Ochtrup | 712.91 mi (1,147.32 km) |
| Tralee to Odenthal | 724.12 mi (1,165.36 km) |
| Tralee to Oelde | 756.96 mi (1,218.21 km) |
| Tralee to Oelsnitz | 948.53 mi (1,526.51 km) |
| Tralee to Oer-Erkenschwick | 721.26 mi (1,160.75 km) |
