| Llanelli to Oberkirch | 583.79 mi (939.52 km) |
| Llanelli to Obernburg am Main | 594.36 mi (956.52 km) |
| Llanelli to Obernkirchen | 565.88 mi (910.70 km) |
| Llanelli to Oberschleissheim | 736.50 mi (1,185.28 km) |
| Llanelli to Oberstdorf | 710.01 mi (1,142.65 km) |
| Llanelli to Obertraubling | 742.66 mi (1,195.20 km) |
| Llanelli to Obertshausen | 576.71 mi (928.13 km) |
| Llanelli to Oberursel | 563.22 mi (906.42 km) |
| Llanelli to Ochsenfurt | 637.70 mi (1,026.28 km) |
| Llanelli to Ochsenhausen | 674.67 mi (1,085.78 km) |
| Llanelli to Ochtrup | 484.38 mi (779.54 km) |
| Llanelli to Odenthal | 488.24 mi (785.75 km) |
| Llanelli to Oelde | 526.07 mi (846.62 km) |
| Llanelli to Oelsnitz | 713.13 mi (1,147.68 km) |
| Llanelli to Oer-Erkenschwick | 488.68 mi (786.45 km) |
