| Killarney to Novi di Modena | 1,052.73 mi (1,694.20 km) |
| Killarney to Novi Ligure | 974.86 mi (1,568.89 km) |
| Killarney to Nuoro | 1,205.99 mi (1,940.86 km) |
| Killarney to Occhiobello | 1,078.87 mi (1,736.27 km) |
| Killarney to Oderzo | 1,083.48 mi (1,743.70 km) |
| Killarney to Oggiono | 955.82 mi (1,538.24 km) |
| Killarney to Olbia | 1,181.15 mi (1,900.88 km) |
| Killarney to Oleggio | 934.44 mi (1,503.83 km) |
| Killarney to Olgiate Comasco | 940.50 mi (1,513.58 km) |
| Killarney to Olgiate Olona | 943.03 mi (1,517.67 km) |
| Killarney to Omegna | 914.53 mi (1,471.79 km) |
| Killarney to Opera | 966.16 mi (1,554.89 km) |
| Killarney to Oppeano | 1,048.11 mi (1,686.76 km) |
| Killarney to Orbassano | 916.10 mi (1,474.33 km) |
| Killarney to Orbetello | 1,170.69 mi (1,884.05 km) |
