| Norwalk to Oerlinghausen | 5,688.56 mi (9,154.85 km) |
| Norwalk to Oestrich-Winkel | 5,769.55 mi (9,285.19 km) |
| Norwalk to Offenburg | 5,845.71 mi (9,407.77 km) |
| Norwalk to Oftersheim | 5,819.31 mi (9,365.28 km) |
| Norwalk to Ohrdruf | 5,806.45 mi (9,344.57 km) |
| Norwalk to Ohringen | 5,855.54 mi (9,423.59 km) |
| Norwalk to Olbernhau | 5,887.51 mi (9,475.03 km) |
| Norwalk to Olching | 5,961.93 mi (9,594.80 km) |
| Norwalk to Oldenburg | 5,615.64 mi (9,037.51 km) |
| Norwalk to Oldenburg in Holstein | 5,628.52 mi (9,058.23 km) |
| Norwalk to Olfen | 5,664.19 mi (9,115.64 km) |
| Norwalk to Olpe | 5,712.85 mi (9,193.94 km) |
| Norwalk to Olsberg | 5,714.85 mi (9,197.17 km) |
| Norwalk to Oranienburg | 5,772.43 mi (9,289.82 km) |
| Norwalk to Ortenberg | 5,782.61 mi (9,306.21 km) |
