| Killarney to Oberkirch | 811.37 mi (1,305.78 km) |
| Killarney to Obernburg am Main | 823.70 mi (1,325.62 km) |
| Killarney to Obernkirchen | 787.34 mi (1,267.11 km) |
| Killarney to Oberschleissheim | 965.46 mi (1,553.76 km) |
| Killarney to Oberstdorf | 936.59 mi (1,507.30 km) |
| Killarney to Obertraubling | 972.06 mi (1,564.38 km) |
| Killarney to Obertshausen | 805.95 mi (1,297.05 km) |
| Killarney to Oberursel | 792.37 mi (1,275.20 km) |
| Killarney to Ochsenfurt | 867.05 mi (1,395.38 km) |
| Killarney to Ochsenhausen | 902.57 mi (1,452.54 km) |
| Killarney to Ochtrup | 706.69 mi (1,137.30 km) |
| Killarney to Odenthal | 716.22 mi (1,152.64 km) |
| Killarney to Oelde | 750.32 mi (1,207.52 km) |
| Killarney to Oelsnitz | 940.85 mi (1,514.16 km) |
| Killarney to Oer-Erkenschwick | 714.22 mi (1,149.43 km) |
