| Norwalk to Nuth | 5,659.62 mi (9,108.28 km) |
| Norwalk to Oegstgeest | 5,554.59 mi (8,939.24 km) |
| Norwalk to Oirschot | 5,613.14 mi (9,033.48 km) |
| Norwalk to Oisterwijk | 5,606.03 mi (9,022.03 km) |
| Norwalk to Oldebroek | 5,584.07 mi (8,986.69 km) |
| Norwalk to Oldenzaal | 5,620.88 mi (9,045.94 km) |
| Norwalk to Ommen | 5,595.86 mi (9,005.67 km) |
| Norwalk to Oosterend | 5,561.48 mi (8,950.34 km) |
| Norwalk to Oosterhout | 5,592.73 mi (9,000.63 km) |
| Norwalk to Oosterwolde | 5,568.65 mi (8,961.87 km) |
| Norwalk to Oostzaan | 5,554.84 mi (8,939.66 km) |
| Norwalk to Opmeer | 5,543.77 mi (8,921.84 km) |
| Norwalk to Oss | 5,606.50 mi (9,022.79 km) |
| Norwalk to Oud-Beijerland | 5,570.42 mi (8,964.73 km) |
| Norwalk to Oudenbosch | 5,585.27 mi (8,988.62 km) |
