| Ennis to Oberkirch | 801.74 mi (1,290.27 km) |
| Ennis to Obernburg am Main | 806.83 mi (1,298.47 km) |
| Ennis to Obernkirchen | 759.31 mi (1,221.99 km) |
| Ennis to Oberschleissheim | 952.41 mi (1,532.75 km) |
| Ennis to Oberstdorf | 928.41 mi (1,494.13 km) |
| Ennis to Obertraubling | 955.64 mi (1,537.95 km) |
| Ennis to Obertshausen | 788.36 mi (1,268.75 km) |
| Ennis to Oberursel | 774.41 mi (1,246.29 km) |
| Ennis to Ochsenfurt | 850.05 mi (1,368.02 km) |
| Ennis to Ochsenhausen | 892.26 mi (1,435.96 km) |
| Ennis to Ochtrup | 679.77 mi (1,093.98 km) |
| Ennis to Odenthal | 695.48 mi (1,119.26 km) |
| Ennis to Oelde | 724.80 mi (1,166.45 km) |
| Ennis to Oelsnitz | 918.85 mi (1,478.75 km) |
| Ennis to Oer-Erkenschwick | 690.20 mi (1,110.77 km) |
