| Piera to Oberkirch | 574.28 mi (924.22 km) |
| Piera to Obernburg am Main | 675.72 mi (1,087.46 km) |
| Piera to Obernkirchen | 818.81 mi (1,317.75 km) |
| Piera to Oberschleissheim | 667.62 mi (1,074.42 km) |
| Piera to Oberstdorf | 584.48 mi (940.63 km) |
| Piera to Obertraubling | 720.78 mi (1,159.98 km) |
| Piera to Obertshausen | 681.19 mi (1,096.26 km) |
| Piera to Oberursel | 683.19 mi (1,099.49 km) |
| Piera to Ochsenfurt | 689.82 mi (1,110.15 km) |
| Piera to Ochsenhausen | 604.62 mi (973.04 km) |
| Piera to Ochtrup | 781.06 mi (1,257.00 km) |
| Piera to Odenthal | 704.89 mi (1,134.42 km) |
| Piera to Oelde | 773.61 mi (1,245.01 km) |
| Piera to Oelsnitz | 790.86 mi (1,272.77 km) |
| Piera to Oer-Erkenschwick | 745.90 mi (1,200.41 km) |
