| Barrington to Orbetello | 4,743.27 mi (7,633.56 km) |
| Barrington to Oria | 5,083.75 mi (8,181.50 km) |
| Barrington to Oristano | 4,743.62 mi (7,634.11 km) |
| Barrington to Orta Nova | 4,970.51 mi (7,999.26 km) |
| Barrington to Orte | 4,789.18 mi (7,707.44 km) |
| Barrington to Ortona | 4,873.47 mi (7,843.10 km) |
| Barrington to Orvieto | 4,767.08 mi (7,671.88 km) |
| Barrington to Orzinuovi | 4,568.39 mi (7,352.11 km) |
| Barrington to Osimo | 4,787.89 mi (7,705.37 km) |
| Barrington to Ospitaletto | 4,567.44 mi (7,350.58 km) |
| Barrington to Ostuni | 5,071.03 mi (8,161.04 km) |
| Barrington to Ottaviano | 4,943.27 mi (7,955.42 km) |
| Barrington to Ovada | 4,549.00 mi (7,320.91 km) |
| Barrington to Ozieri | 4,732.05 mi (7,615.50 km) |
| Barrington to Paceco | 4,992.51 mi (8,034.67 km) |
