| Tallaght to Novi di Modena | 968.57 mi (1,558.77 km) |
| Tallaght to Novi Ligure | 901.18 mi (1,450.31 km) |
| Tallaght to Nuoro | 1,158.35 mi (1,864.19 km) |
| Tallaght to Occhiobello | 991.80 mi (1,596.15 km) |
| Tallaght to Oderzo | 987.20 mi (1,588.74 km) |
| Tallaght to Oggiono | 871.50 mi (1,402.55 km) |
| Tallaght to Olbia | 1,129.29 mi (1,817.42 km) |
| Tallaght to Oleggio | 854.84 mi (1,375.73 km) |
| Tallaght to Olgiate Comasco | 857.88 mi (1,380.62 km) |
| Tallaght to Olgiate Olona | 862.00 mi (1,387.26 km) |
| Tallaght to Omegna | 833.69 mi (1,341.69 km) |
| Tallaght to Opera | 885.60 mi (1,425.24 km) |
| Tallaght to Oppeano | 959.92 mi (1,544.85 km) |
| Tallaght to Orbassano | 846.85 mi (1,362.87 km) |
| Tallaght to Orbetello | 1,101.40 mi (1,772.53 km) |
