| Glencullen to Novi di Modena | 961.25 mi (1,546.99 km) |
| Glencullen to Novi Ligure | 893.80 mi (1,438.43 km) |
| Glencullen to Nuoro | 1,151.01 mi (1,852.37 km) |
| Glencullen to Occhiobello | 984.51 mi (1,584.42 km) |
| Glencullen to Oderzo | 980.02 mi (1,577.19 km) |
| Glencullen to Oggiono | 864.18 mi (1,390.76 km) |
| Glencullen to Olbia | 1,121.93 mi (1,805.57 km) |
| Glencullen to Oleggio | 847.48 mi (1,363.89 km) |
| Glencullen to Olgiate Comasco | 850.54 mi (1,368.81 km) |
| Glencullen to Olgiate Olona | 854.66 mi (1,375.44 km) |
| Glencullen to Omegna | 826.34 mi (1,329.86 km) |
| Glencullen to Opera | 878.26 mi (1,413.42 km) |
| Glencullen to Oppeano | 952.64 mi (1,533.13 km) |
| Glencullen to Orbassano | 839.46 mi (1,350.98 km) |
| Glencullen to Orbetello | 1,094.02 mi (1,760.65 km) |
