| Ianca to Nuth | 1,069.83 mi (1,721.72 km) |
| Ianca to Oegstgeest | 1,150.92 mi (1,852.23 km) |
| Ianca to Oirschot | 1,104.15 mi (1,776.95 km) |
| Ianca to Oisterwijk | 1,109.77 mi (1,786.00 km) |
| Ianca to Oldebroek | 1,098.61 mi (1,768.04 km) |
| Ianca to Oldenzaal | 1,054.44 mi (1,696.95 km) |
| Ianca to Ommen | 1,079.60 mi (1,737.46 km) |
| Ianca to Oosterend | 1,105.02 mi (1,778.35 km) |
| Ianca to Oosterhout | 1,125.06 mi (1,810.61 km) |
| Ianca to Oosterwolde | 1,095.95 mi (1,763.76 km) |
| Ianca to Oostzaan | 1,138.97 mi (1,833.00 km) |
| Ianca to Opmeer | 1,141.92 mi (1,837.74 km) |
| Ianca to Oss | 1,100.06 mi (1,770.37 km) |
| Ianca to Oud-Beijerland | 1,147.01 mi (1,845.93 km) |
| Ianca to Oudenbosch | 1,137.98 mi (1,831.40 km) |
