| Kopavogur to Oerlinghausen | 1,375.80 mi (2,214.13 km) |
| Kopavogur to Oestrich-Winkel | 1,463.44 mi (2,355.18 km) |
| Kopavogur to Offenburg | 1,547.50 mi (2,490.46 km) |
| Kopavogur to Oftersheim | 1,513.92 mi (2,436.42 km) |
| Kopavogur to Ohrdruf | 1,493.37 mi (2,403.35 km) |
| Kopavogur to Ohringen | 1,547.95 mi (2,491.19 km) |
| Kopavogur to Olbernhau | 1,575.23 mi (2,535.08 km) |
| Kopavogur to Olching | 1,652.73 mi (2,659.81 km) |
| Kopavogur to Oldenburg | 1,302.41 mi (2,096.03 km) |
| Kopavogur to Oldenburg in Holstein | 1,321.83 mi (2,127.29 km) |
| Kopavogur to Olfen | 1,353.68 mi (2,178.54 km) |
| Kopavogur to Olpe | 1,403.46 mi (2,258.65 km) |
| Kopavogur to Olsberg | 1,403.32 mi (2,258.43 km) |
| Kopavogur to Oranienburg | 1,465.67 mi (2,358.77 km) |
| Kopavogur to Ortenberg | 1,472.47 mi (2,369.71 km) |
