| Aveiro to Nuth | 994.24 mi (1,600.07 km) |
| Aveiro to Oegstgeest | 1,010.31 mi (1,625.94 km) |
| Aveiro to Oirschot | 1,002.05 mi (1,612.65 km) |
| Aveiro to Oisterwijk | 1,002.87 mi (1,613.97 km) |
| Aveiro to Oldebroek | 1,065.84 mi (1,715.30 km) |
| Aveiro to Oldenzaal | 1,091.52 mi (1,756.63 km) |
| Aveiro to Ommen | 1,084.74 mi (1,745.72 km) |
| Aveiro to Oosterend | 1,097.70 mi (1,766.58 km) |
| Aveiro to Oosterhout | 995.16 mi (1,601.56 km) |
| Aveiro to Oosterwolde | 1,103.67 mi (1,776.19 km) |
| Aveiro to Oostzaan | 1,034.95 mi (1,665.59 km) |
| Aveiro to Opmeer | 1,050.31 mi (1,690.31 km) |
| Aveiro to Oss | 1,021.44 mi (1,643.85 km) |
| Aveiro to Oud-Beijerland | 989.96 mi (1,593.19 km) |
| Aveiro to Oudenbosch | 982.42 mi (1,581.05 km) |
