| Omagh to Oberkirch | 779.24 mi (1,254.07 km) |
| Omagh to Obernburg am Main | 766.70 mi (1,233.89 km) |
| Omagh to Obernkirchen | 692.55 mi (1,114.55 km) |
| Omagh to Oberschleissheim | 918.98 mi (1,478.95 km) |
| Omagh to Oberstdorf | 907.04 mi (1,459.73 km) |
| Omagh to Obertraubling | 914.05 mi (1,471.02 km) |
| Omagh to Obertshausen | 746.87 mi (1,201.97 km) |
| Omagh to Oberursel | 732.28 mi (1,178.50 km) |
| Omagh to Ochsenfurt | 808.77 mi (1,301.59 km) |
| Omagh to Ochsenhausen | 866.41 mi (1,394.35 km) |
| Omagh to Ochtrup | 617.62 mi (993.97 km) |
| Omagh to Odenthal | 648.42 mi (1,043.54 km) |
| Omagh to Oelde | 665.09 mi (1,070.35 km) |
| Omagh to Oelsnitz | 864.25 mi (1,390.87 km) |
| Omagh to Oer-Erkenschwick | 635.09 mi (1,022.07 km) |
