| Gabrovo to Oegstgeest | 1,160.57 mi (1,867.75 km) |
| Gabrovo to Oirschot | 1,108.35 mi (1,783.72 km) |
| Gabrovo to Oisterwijk | 1,114.66 mi (1,793.88 km) |
| Gabrovo to Oldebroek | 1,115.01 mi (1,794.43 km) |
| Gabrovo to Oldenzaal | 1,072.53 mi (1,726.07 km) |
| Gabrovo to Ommen | 1,098.29 mi (1,767.53 km) |
| Gabrovo to Oosterend | 1,127.89 mi (1,815.16 km) |
| Gabrovo to Oosterhout | 1,129.77 mi (1,818.19 km) |
| Gabrovo to Oosterwolde | 1,119.38 mi (1,801.47 km) |
| Gabrovo to Oostzaan | 1,152.37 mi (1,854.55 km) |
| Gabrovo to Opmeer | 1,158.33 mi (1,864.15 km) |
| Gabrovo to Oss | 1,107.82 mi (1,782.87 km) |
| Gabrovo to Oud-Beijerland | 1,152.52 mi (1,854.81 km) |
| Gabrovo to Oudenbosch | 1,141.30 mi (1,836.74 km) |
| Gabrovo to Oudewater | 1,140.29 mi (1,835.12 km) |
