| Aveiro to Oerlinghausen | 1,133.22 mi (1,823.75 km) |
| Aveiro to Oestrich-Winkel | 1,031.97 mi (1,660.80 km) |
| Aveiro to Offenburg | 976.38 mi (1,571.33 km) |
| Aveiro to Oftersheim | 1,032.09 mi (1,660.99 km) |
| Aveiro to Ohrdruf | 1,164.55 mi (1,874.16 km) |
| Aveiro to Ohringen | 1,062.92 mi (1,710.60 km) |
| Aveiro to Olbernhau | 1,260.52 mi (2,028.61 km) |
| Aveiro to Olching | 1,110.85 mi (1,787.74 km) |
| Aveiro to Oldenburg | 1,169.48 mi (1,882.09 km) |
| Aveiro to Oldenburg in Holstein | 1,304.47 mi (2,099.33 km) |
| Aveiro to Olfen | 1,079.37 mi (1,737.09 km) |
| Aveiro to Olpe | 1,065.41 mi (1,714.61 km) |
| Aveiro to Olsberg | 1,101.71 mi (1,773.03 km) |
| Aveiro to Oranienburg | 1,323.90 mi (2,130.61 km) |
| Aveiro to Ortenberg | 1,084.60 mi (1,745.50 km) |
