| Kars to Oerlinghausen | 1,799.30 mi (2,895.69 km) |
| Kars to Oestrich-Winkel | 1,804.72 mi (2,904.42 km) |
| Kars to Offenburg | 1,796.81 mi (2,891.68 km) |
| Kars to Oftersheim | 1,773.39 mi (2,854.00 km) |
| Kars to Ohrdruf | 1,695.77 mi (2,729.08 km) |
| Kars to Ohringen | 1,731.01 mi (2,785.79 km) |
| Kars to Olbernhau | 1,582.55 mi (2,546.87 km) |
| Kars to Olching | 1,640.36 mi (2,639.90 km) |
| Kars to Oldenburg | 1,836.19 mi (2,955.06 km) |
| Kars to Oldenburg in Holstein | 1,754.45 mi (2,823.52 km) |
| Kars to Olfen | 1,849.68 mi (2,976.77 km) |
| Kars to Olpe | 1,822.28 mi (2,932.68 km) |
| Kars to Olsberg | 1,798.57 mi (2,894.53 km) |
| Kars to Oranienburg | 1,628.08 mi (2,620.13 km) |
| Kars to Ortenberg | 1,762.10 mi (2,835.83 km) |
