| Glendale to Orbetello | 6,082.26 mi (9,788.45 km) |
| Glendale to Oria | 6,403.98 mi (10,306.21 km) |
| Glendale to Oristano | 6,110.06 mi (9,833.20 km) |
| Glendale to Orta Nova | 6,295.20 mi (10,131.15 km) |
| Glendale to Orte | 6,122.54 mi (9,853.28 km) |
| Glendale to Ortona | 6,197.73 mi (9,974.29 km) |
| Glendale to Orvieto | 6,099.95 mi (9,816.92 km) |
| Glendale to Orzinuovi | 5,891.83 mi (9,481.99 km) |
| Glendale to Osimo | 6,108.59 mi (9,830.83 km) |
| Glendale to Ospitaletto | 5,889.04 mi (9,477.50 km) |
| Glendale to Ostuni | 6,389.92 mi (10,283.58 km) |
| Glendale to Ottaviano | 6,277.51 mi (10,102.68 km) |
| Glendale to Ovada | 5,883.91 mi (9,469.24 km) |
| Glendale to Ozieri | 6,092.73 mi (9,805.30 km) |
| Glendale to Paceco | 6,353.81 mi (10,225.47 km) |
