| Caister-on-Sea to Nuth | 214.02 mi (344.44 km) |
| Caister-on-Sea to Oegstgeest | 119.64 mi (192.54 km) |
| Caister-on-Sea to Oirschot | 171.06 mi (275.29 km) |
| Caister-on-Sea to Oisterwijk | 164.53 mi (264.79 km) |
| Caister-on-Sea to Oldebroek | 175.59 mi (282.59 km) |
| Caister-on-Sea to Oldenzaal | 219.98 mi (354.02 km) |
| Caister-on-Sea to Ommen | 196.81 mi (316.74 km) |
| Caister-on-Sea to Oosterend | 182.51 mi (293.73 km) |
| Caister-on-Sea to Oosterhout | 149.62 mi (240.79 km) |
| Caister-on-Sea to Oosterwolde | 191.74 mi (308.57 km) |
| Caister-on-Sea to Oostzaan | 133.22 mi (214.40 km) |
| Caister-on-Sea to Opmeer | 134.80 mi (216.94 km) |
| Caister-on-Sea to Oss | 171.43 mi (275.89 km) |
| Caister-on-Sea to Oud-Beijerland | 126.71 mi (203.93 km) |
| Caister-on-Sea to Oudenbosch | 139.27 mi (224.14 km) |
