| Rosemont to Oakleaf Plantation (Florida) | 2,308.44 mi (3,715.08 km) |
| Rosemont to Oakley (California) | 42.54 mi (68.47 km) |
| Rosemont to Oakton (Virginia) | 2,351.33 mi (3,784.09 km) |
| Rosemont to Oakville (Missouri) | 1,670.16 mi (2,687.86 km) |
| Rosemont to Oatfield (Oregon) | 478.54 mi (770.13 km) |
| Rosemont to Ocala (Florida) | 2,321.35 mi (3,735.85 km) |
| Rosemont to Ocean Acres (New Jersey) | 2,494.38 mi (4,014.32 km) |
| Rosemont to Ocean City (New Jersey) | 2,485.60 mi (4,000.19 km) |
| Rosemont to Ocean Pines (Maryland) | 2,472.52 mi (3,979.13 km) |
| Rosemont to Ocean Pointe (Hawaii) | 2,474.77 mi (3,982.76 km) |
| Rosemont to Ocean Springs (Mississippi) | 1,926.95 mi (3,101.13 km) |
| Rosemont to Oceanside (California) | 431.84 mi (694.99 km) |
| Rosemont to Oceanside (New York) | 2,513.50 mi (4,045.09 km) |
| Rosemont to Ocoee (Florida) | 2,373.45 mi (3,819.70 km) |
| Rosemont to Oconomowoc (Wisconsin) | 1,735.13 mi (2,792.42 km) |
