| Glasgow to Orbetello | 1,155.58 mi (1,859.72 km) |
| Glasgow to Oria | 1,451.55 mi (2,336.05 km) |
| Glasgow to Oristano | 1,248.12 mi (2,008.66 km) |
| Glasgow to Orta Nova | 1,346.65 mi (2,167.22 km) |
| Glasgow to Orte | 1,186.20 mi (1,909.01 km) |
| Glasgow to Ortona | 1,250.20 mi (2,012.01 km) |
| Glasgow to Orvieto | 1,163.61 mi (1,872.65 km) |
| Glasgow to Orzinuovi | 949.63 mi (1,528.27 km) |
| Glasgow to Osimo | 1,159.56 mi (1,866.13 km) |
| Glasgow to Ospitaletto | 944.86 mi (1,520.61 km) |
| Glasgow to Ostuni | 1,436.95 mi (2,312.55 km) |
| Glasgow to Ottaviano | 1,338.29 mi (2,153.76 km) |
| Glasgow to Ovada | 958.89 mi (1,543.18 km) |
| Glasgow to Ozieri | 1,214.41 mi (1,954.40 km) |
| Glasgow to Paceco | 1,459.18 mi (2,348.32 km) |
