| Port Royal to Celbridge | 3,832.11 mi (6,167.19 km) |
| Port Royal to Clondalkin | 3,838.18 mi (6,176.95 km) |
| Port Royal to Clonmel | 3,794.82 mi (6,107.17 km) |
| Port Royal to Cobh | 3,775.86 mi (6,076.65 km) |
| Port Royal to Cork | 3,768.05 mi (6,064.10 km) |
| Port Royal to Donegal | 3,755.75 mi (6,044.29 km) |
| Port Royal to Douglas | 3,769.72 mi (6,066.78 km) |
| Port Royal to Drogheda | 3,835.43 mi (6,172.53 km) |
| Port Royal to Dublin | 3,843.30 mi (6,185.20 km) |
| Port Royal to Dun Dealgan | 3,830.08 mi (6,163.93 km) |
| Port Royal to Ennis | 3,737.08 mi (6,014.25 km) |
| Port Royal to Enniscorthy | 3,840.71 mi (6,181.02 km) |
| Port Royal to Finglas | 3,843.76 mi (6,185.93 km) |
| Port Royal to Galway | 3,730.29 mi (6,003.33 km) |
| Port Royal to Glanmire | 3,770.79 mi (6,068.50 km) |
