| Triangle to Oberkirch | 4,106.73 mi (6,609.15 km) |
| Triangle to Obernburg am Main | 4,111.71 mi (6,617.16 km) |
| Triangle to Obernkirchen | 4,041.54 mi (6,504.23 km) |
| Triangle to Oberschleissheim | 4,258.75 mi (6,853.79 km) |
| Triangle to Oberstdorf | 4,232.08 mi (6,810.87 km) |
| Triangle to Obertraubling | 4,260.42 mi (6,856.49 km) |
| Triangle to Obertshausen | 4,092.69 mi (6,586.56 km) |
| Triangle to Oberursel | 4,078.44 mi (6,563.61 km) |
| Triangle to Ochsenfurt | 4,154.66 mi (6,686.29 km) |
| Triangle to Ochsenhausen | 4,197.76 mi (6,755.64 km) |
| Triangle to Ochtrup | 3,968.18 mi (6,386.17 km) |
| Triangle to Odenthal | 3,996.71 mi (6,432.08 km) |
| Triangle to Oelde | 4,015.78 mi (6,462.78 km) |
| Triangle to Oelsnitz | 4,214.97 mi (6,783.34 km) |
| Triangle to Oer-Erkenschwick | 3,985.58 mi (6,414.18 km) |
