| Redruth to Oberkirch | 609.10 mi (980.25 km) |
| Redruth to Obernburg am Main | 637.11 mi (1,025.32 km) |
| Redruth to Obernkirchen | 634.82 mi (1,021.64 km) |
| Redruth to Oberschleissheim | 767.98 mi (1,235.95 km) |
| Redruth to Oberstdorf | 730.23 mi (1,175.19 km) |
| Redruth to Obertraubling | 781.88 mi (1,258.32 km) |
| Redruth to Obertshausen | 621.55 mi (1,000.29 km) |
| Redruth to Oberursel | 609.27 mi (980.53 km) |
| Redruth to Ochsenfurt | 679.92 mi (1,094.22 km) |
| Redruth to Ochsenhausen | 700.38 mi (1,127.15 km) |
| Redruth to Ochtrup | 553.49 mi (890.76 km) |
| Redruth to Odenthal | 543.00 mi (873.88 km) |
| Redruth to Oelde | 590.65 mi (950.56 km) |
| Redruth to Oelsnitz | 765.48 mi (1,231.93 km) |
| Redruth to Oer-Erkenschwick | 551.10 mi (886.91 km) |
