| Varna to Oegstgeest | 1,246.01 mi (2,005.26 km) |
| Varna to Oirschot | 1,196.39 mi (1,925.41 km) |
| Varna to Oisterwijk | 1,202.38 mi (1,935.04 km) |
| Varna to Oldebroek | 1,196.74 mi (1,925.97 km) |
| Varna to Oldenzaal | 1,153.20 mi (1,855.89 km) |
| Varna to Ommen | 1,178.74 mi (1,897.00 km) |
| Varna to Oosterend | 1,206.18 mi (1,941.15 km) |
| Varna to Oosterhout | 1,217.63 mi (1,959.59 km) |
| Varna to Oosterwolde | 1,197.33 mi (1,926.92 km) |
| Varna to Oostzaan | 1,235.83 mi (1,988.88 km) |
| Varna to Opmeer | 1,240.21 mi (1,995.93 km) |
| Varna to Oss | 1,194.05 mi (1,921.63 km) |
| Varna to Oud-Beijerland | 1,240.06 mi (1,995.68 km) |
| Varna to Oudenbosch | 1,229.91 mi (1,979.34 km) |
| Varna to Oudewater | 1,226.08 mi (1,973.18 km) |
