| Arenys de Mar to Oerlinghausen | 773.01 mi (1,244.05 km) |
| Arenys de Mar to Oestrich-Winkel | 637.72 mi (1,026.31 km) |
| Arenys de Mar to Offenburg | 543.17 mi (874.15 km) |
| Arenys de Mar to Oftersheim | 611.96 mi (984.85 km) |
| Arenys de Mar to Ohrdruf | 748.11 mi (1,203.97 km) |
| Arenys de Mar to Ohringen | 624.51 mi (1,005.05 km) |
| Arenys de Mar to Olbernhau | 811.09 mi (1,305.33 km) |
| Arenys de Mar to Olching | 626.28 mi (1,007.91 km) |
| Arenys de Mar to Oldenburg | 841.02 mi (1,353.49 km) |
| Arenys de Mar to Oldenburg in Holstein | 958.08 mi (1,541.88 km) |
| Arenys de Mar to Olfen | 736.39 mi (1,185.11 km) |
| Arenys de Mar to Olpe | 698.50 mi (1,124.13 km) |
| Arenys de Mar to Olsberg | 731.00 mi (1,176.42 km) |
| Arenys de Mar to Oranienburg | 918.64 mi (1,478.41 km) |
| Arenys de Mar to Ortenberg | 681.34 mi (1,096.52 km) |
