| Kars to Nuth | 1,905.23 mi (3,066.17 km) |
| Kars to Oegstgeest | 1,977.46 mi (3,182.41 km) |
| Kars to Oirschot | 1,935.58 mi (3,115.02 km) |
| Kars to Oisterwijk | 1,940.63 mi (3,123.14 km) |
| Kars to Oldebroek | 1,920.68 mi (3,091.04 km) |
| Kars to Oldenzaal | 1,876.15 mi (3,019.38 km) |
| Kars to Ommen | 1,900.15 mi (3,058.00 km) |
| Kars to Oosterend | 1,921.03 mi (3,091.59 km) |
| Kars to Oosterhout | 1,955.78 mi (3,147.52 km) |
| Kars to Oosterwolde | 1,911.67 mi (3,076.54 km) |
| Kars to Oostzaan | 1,962.69 mi (3,158.65 km) |
| Kars to Opmeer | 1,962.96 mi (3,159.08 km) |
| Kars to Oss | 1,929.02 mi (3,104.46 km) |
| Kars to Oud-Beijerland | 1,976.75 mi (3,181.28 km) |
| Kars to Oudenbosch | 1,969.45 mi (3,169.53 km) |
