| Bartlett to Orbetello | 5,119.82 mi (8,239.56 km) |
| Bartlett to Oria | 5,468.11 mi (8,800.07 km) |
| Bartlett to Oristano | 5,101.30 mi (8,209.75 km) |
| Bartlett to Orta Nova | 5,353.40 mi (8,615.47 km) |
| Bartlett to Orte | 5,168.70 mi (8,318.23 km) |
| Bartlett to Ortona | 5,257.46 mi (8,461.06 km) |
| Bartlett to Orvieto | 5,147.10 mi (8,283.45 km) |
| Bartlett to Orzinuovi | 4,955.53 mi (7,975.15 km) |
| Bartlett to Osimo | 5,174.57 mi (8,327.67 km) |
| Bartlett to Ospitaletto | 4,955.58 mi (7,975.24 km) |
| Bartlett to Ostuni | 5,456.22 mi (8,780.94 km) |
| Bartlett to Ottaviano | 5,320.92 mi (8,563.19 km) |
| Bartlett to Ovada | 4,929.76 mi (7,933.68 km) |
| Bartlett to Ozieri | 5,094.18 mi (8,198.29 km) |
| Bartlett to Paceco | 5,351.89 mi (8,613.04 km) |
