| Bucharest to Oberkirch | 900.42 mi (1,449.09 km) |
| Bucharest to Obernburg am Main | 877.84 mi (1,412.74 km) |
| Bucharest to Obernkirchen | 945.67 mi (1,521.92 km) |
| Bucharest to Oberschleissheim | 740.46 mi (1,191.65 km) |
| Bucharest to Oberstdorf | 786.38 mi (1,265.55 km) |
| Bucharest to Obertraubling | 729.47 mi (1,173.97 km) |
| Bucharest to Obertshausen | 895.87 mi (1,441.77 km) |
| Bucharest to Oberursel | 909.70 mi (1,464.02 km) |
| Bucharest to Ochsenfurt | 834.50 mi (1,343.01 km) |
| Bucharest to Ochsenhausen | 810.01 mi (1,303.58 km) |
| Bucharest to Ochtrup | 1,016.97 mi (1,636.66 km) |
| Bucharest to Odenthal | 989.27 mi (1,592.08 km) |
| Bucharest to Oelde | 969.17 mi (1,559.72 km) |
| Bucharest to Oelsnitz | 769.75 mi (1,238.80 km) |
| Bucharest to Oer-Erkenschwick | 999.13 mi (1,607.95 km) |
