| Abbots Langley to Orbetello | 839.93 mi (1,351.74 km) |
| Abbots Langley to Oria | 1,154.71 mi (1,858.33 km) |
| Abbots Langley to Oristano | 921.65 mi (1,483.25 km) |
| Abbots Langley to Orta Nova | 1,045.16 mi (1,682.03 km) |
| Abbots Langley to Orte | 875.29 mi (1,408.64 km) |
| Abbots Langley to Ortona | 947.69 mi (1,525.15 km) |
| Abbots Langley to Orvieto | 852.61 mi (1,372.14 km) |
| Abbots Langley to Orzinuovi | 641.99 mi (1,033.19 km) |
| Abbots Langley to Osimo | 858.73 mi (1,381.99 km) |
| Abbots Langley to Ospitaletto | 639.01 mi (1,028.38 km) |
| Abbots Langley to Ostuni | 1,141.00 mi (1,836.26 km) |
| Abbots Langley to Ottaviano | 1,029.57 mi (1,656.94 km) |
| Abbots Langley to Ovada | 641.25 mi (1,031.99 km) |
| Abbots Langley to Ozieri | 888.97 mi (1,430.66 km) |
| Abbots Langley to Paceco | 1,137.23 mi (1,830.20 km) |
