| Carrigaline to Oegstgeest | 546.79 mi (879.97 km) |
| Carrigaline to Oirschot | 586.35 mi (943.63 km) |
| Carrigaline to Oisterwijk | 581.36 mi (935.61 km) |
| Carrigaline to Oldebroek | 606.66 mi (976.32 km) |
| Carrigaline to Oldenzaal | 650.57 mi (1,046.99 km) |
| Carrigaline to Ommen | 628.27 mi (1,011.11 km) |
| Carrigaline to Oosterend | 613.74 mi (987.72 km) |
| Carrigaline to Oosterhout | 566.26 mi (911.31 km) |
| Carrigaline to Oosterwolde | 623.06 mi (1,002.73 km) |
| Carrigaline to Oostzaan | 563.87 mi (907.47 km) |
| Carrigaline to Opmeer | 566.66 mi (911.96 km) |
| Carrigaline to Oss | 593.44 mi (955.05 km) |
| Carrigaline to Oud-Beijerland | 545.61 mi (878.07 km) |
| Carrigaline to Oudenbosch | 552.49 mi (889.15 km) |
| Carrigaline to Oudewater | 564.37 mi (908.27 km) |
