| Burr Ridge to Orbetello | 4,752.28 mi (7,648.05 km) |
| Burr Ridge to Oria | 5,093.59 mi (8,197.34 km) |
| Burr Ridge to Oristano | 4,750.90 mi (7,645.83 km) |
| Burr Ridge to Orta Nova | 4,980.17 mi (8,014.82 km) |
| Burr Ridge to Orte | 4,798.48 mi (7,722.40 km) |
| Burr Ridge to Ortona | 4,883.22 mi (7,858.78 km) |
| Burr Ridge to Orvieto | 4,776.42 mi (7,686.91 km) |
| Burr Ridge to Orzinuovi | 4,578.36 mi (7,368.15 km) |
| Burr Ridge to Osimo | 4,797.88 mi (7,721.43 km) |
| Burr Ridge to Ospitaletto | 4,577.50 mi (7,366.77 km) |
| Burr Ridge to Ostuni | 5,080.95 mi (8,176.99 km) |
| Burr Ridge to Ottaviano | 4,952.43 mi (7,970.17 km) |
| Burr Ridge to Ovada | 4,558.35 mi (7,335.95 km) |
| Burr Ridge to Ozieri | 4,739.73 mi (7,627.85 km) |
| Burr Ridge to Paceco | 5,000.02 mi (8,046.75 km) |
