| Llanelli to Orbetello | 961.74 mi (1,547.76 km) |
| Llanelli to Oria | 1,290.87 mi (2,077.46 km) |
| Llanelli to Oristano | 1,016.58 mi (1,636.03 km) |
| Llanelli to Orta Nova | 1,178.84 mi (1,897.17 km) |
| Llanelli to Orte | 1,002.25 mi (1,612.96 km) |
| Llanelli to Ortona | 1,081.40 mi (1,740.35 km) |
| Llanelli to Orvieto | 979.72 mi (1,576.71 km) |
| Llanelli to Orzinuovi | 775.32 mi (1,247.76 km) |
| Llanelli to Osimo | 994.56 mi (1,600.60 km) |
| Llanelli to Ospitaletto | 773.91 mi (1,245.48 km) |
| Llanelli to Ostuni | 1,277.82 mi (2,056.45 km) |
| Llanelli to Ottaviano | 1,157.27 mi (1,862.45 km) |
| Llanelli to Ovada | 763.25 mi (1,228.33 km) |
| Llanelli to Ozieri | 989.59 mi (1,592.60 km) |
| Llanelli to Paceco | 1,245.64 mi (2,004.67 km) |
