| Ridgefield to Oerlinghausen | 3,796.25 mi (6,109.48 km) |
| Ridgefield to Oestrich-Winkel | 3,824.95 mi (6,155.66 km) |
| Ridgefield to Offenburg | 3,866.74 mi (6,222.91 km) |
| Ridgefield to Oftersheim | 3,866.89 mi (6,223.16 km) |
| Ridgefield to Ohrdruf | 3,909.93 mi (6,292.42 km) |
| Ridgefield to Ohringen | 3,909.21 mi (6,291.26 km) |
| Ridgefield to Olbernhau | 4,016.77 mi (6,464.37 km) |
| Ridgefield to Olching | 4,014.19 mi (6,460.22 km) |
| Ridgefield to Oldenburg | 3,746.94 mi (6,030.12 km) |
| Ridgefield to Oldenburg in Holstein | 3,816.27 mi (6,141.69 km) |
| Ridgefield to Olfen | 3,752.72 mi (6,039.41 km) |
| Ridgefield to Olpe | 3,789.66 mi (6,098.87 km) |
| Ridgefield to Olsberg | 3,806.17 mi (6,125.43 km) |
| Ridgefield to Oranienburg | 3,948.68 mi (6,354.79 km) |
| Ridgefield to Ortenberg | 3,857.18 mi (6,207.53 km) |
