| Ercis to Oberkirch | 1,858.37 mi (2,990.76 km) |
| Ercis to Obernburg am Main | 1,825.60 mi (2,938.02 km) |
| Ercis to Obernkirchen | 1,865.25 mi (3,001.83 km) |
| Ercis to Oberschleissheim | 1,697.45 mi (2,731.78 km) |
| Ercis to Oberstdorf | 1,747.78 mi (2,812.78 km) |
| Ercis to Obertraubling | 1,680.18 mi (2,703.99 km) |
| Ercis to Obertshausen | 1,842.05 mi (2,964.49 km) |
| Ercis to Oberursel | 1,855.01 mi (2,985.35 km) |
| Ercis to Ochsenfurt | 1,782.52 mi (2,868.69 km) |
| Ercis to Ochsenhausen | 1,769.13 mi (2,847.15 km) |
| Ercis to Ochtrup | 1,943.14 mi (3,127.18 km) |
| Ercis to Odenthal | 1,928.92 mi (3,104.30 km) |
| Ercis to Oelde | 1,897.43 mi (3,053.61 km) |
| Ercis to Oelsnitz | 1,704.21 mi (2,742.67 km) |
| Ercis to Oer-Erkenschwick | 1,931.90 mi (3,109.08 km) |
