| Carrick on Shannon to Oria | 1,508.98 mi (2,428.47 km) |
| Carrick on Shannon to Oristano | 1,242.85 mi (2,000.17 km) |
| Carrick on Shannon to Orta Nova | 1,398.34 mi (2,250.40 km) |
| Carrick on Shannon to Orte | 1,224.62 mi (1,970.83 km) |
| Carrick on Shannon to Ortona | 1,300.79 mi (2,093.42 km) |
| Carrick on Shannon to Orvieto | 1,202.00 mi (1,934.44 km) |
| Carrick on Shannon to Orzinuovi | 994.48 mi (1,600.47 km) |
| Carrick on Shannon to Osimo | 1,212.64 mi (1,951.56 km) |
| Carrick on Shannon to Ospitaletto | 992.22 mi (1,596.82 km) |
| Carrick on Shannon to Ostuni | 1,495.49 mi (2,406.76 km) |
| Carrick on Shannon to Ottaviano | 1,379.53 mi (2,220.15 km) |
| Carrick on Shannon to Ovada | 986.82 mi (1,588.14 km) |
| Carrick on Shannon to Ozieri | 1,216.12 mi (1,957.15 km) |
| Carrick on Shannon to Paceco | 1,472.03 mi (2,369.01 km) |
| Carrick on Shannon to Pachino | 1,624.28 mi (2,614.02 km) |
