| Alkmaar to Oberkirch | 318.72 mi (512.93 km) |
| Alkmaar to Obernburg am Main | 270.71 mi (435.67 km) |
| Alkmaar to Obernkirchen | 185.63 mi (298.75 km) |
| Alkmaar to Oberschleissheim | 425.91 mi (685.43 km) |
| Alkmaar to Oberstdorf | 436.19 mi (701.98 km) |
| Alkmaar to Obertraubling | 410.89 mi (661.27 km) |
| Alkmaar to Obertshausen | 249.92 mi (402.20 km) |
| Alkmaar to Oberursel | 235.27 mi (378.63 km) |
| Alkmaar to Ochsenfurt | 309.06 mi (497.38 km) |
| Alkmaar to Ochsenhausen | 389.43 mi (626.73 km) |
| Alkmaar to Ochtrup | 106.99 mi (172.18 km) |
| Alkmaar to Odenthal | 149.76 mi (241.01 km) |
| Alkmaar to Oelde | 154.11 mi (248.01 km) |
| Alkmaar to Oelsnitz | 353.48 mi (568.87 km) |
| Alkmaar to Oer-Erkenschwick | 126.23 mi (203.14 km) |
