| Haskovo to Oegstgeest | 1,212.52 mi (1,951.37 km) |
| Haskovo to Oirschot | 1,159.36 mi (1,865.81 km) |
| Haskovo to Oisterwijk | 1,165.79 mi (1,876.16 km) |
| Haskovo to Oldebroek | 1,168.49 mi (1,880.50 km) |
| Haskovo to Oldenzaal | 1,126.49 mi (1,812.91 km) |
| Haskovo to Ommen | 1,152.27 mi (1,854.40 km) |
| Haskovo to Oosterend | 1,182.56 mi (1,903.14 km) |
| Haskovo to Oosterhout | 1,180.80 mi (1,900.32 km) |
| Haskovo to Oosterwolde | 1,174.18 mi (1,889.67 km) |
| Haskovo to Oostzaan | 1,205.12 mi (1,939.45 km) |
| Haskovo to Opmeer | 1,211.66 mi (1,949.98 km) |
| Haskovo to Oss | 1,159.58 mi (1,866.16 km) |
| Haskovo to Oud-Beijerland | 1,203.65 mi (1,937.08 km) |
| Haskovo to Oudenbosch | 1,191.99 mi (1,918.32 km) |
| Haskovo to Oudewater | 1,192.15 mi (1,918.58 km) |
