| Morriston to Oberkirch | 574.23 mi (924.13 km) |
| Morriston to Obernburg am Main | 584.66 mi (940.92 km) |
| Morriston to Obernkirchen | 556.63 mi (895.80 km) |
| Morriston to Oberschleissheim | 726.84 mi (1,169.73 km) |
| Morriston to Oberstdorf | 700.50 mi (1,127.34 km) |
| Morriston to Obertraubling | 732.97 mi (1,179.60 km) |
| Morriston to Obertshausen | 567.02 mi (912.54 km) |
| Morriston to Oberursel | 553.53 mi (890.83 km) |
| Morriston to Ochsenfurt | 628.01 mi (1,010.68 km) |
| Morriston to Ochsenhausen | 665.08 mi (1,070.34 km) |
| Morriston to Ochtrup | 475.10 mi (764.60 km) |
| Morriston to Odenthal | 478.62 mi (770.26 km) |
| Morriston to Oelde | 516.66 mi (831.48 km) |
| Morriston to Oelsnitz | 703.52 mi (1,132.20 km) |
| Morriston to Oer-Erkenschwick | 479.20 mi (771.19 km) |
