| Preakness to Oakleaf Plantation (Florida) | 857.42 mi (1,379.89 km) |
| Preakness to Oakley (California) | 2,509.15 mi (4,038.09 km) |
| Preakness to Oakton (Virginia) | 215.96 mi (347.55 km) |
| Preakness to Oakville (Missouri) | 871.53 mi (1,402.60 km) |
| Preakness to Oatfield (Oregon) | 2,419.72 mi (3,894.16 km) |
| Preakness to Ocala (Florida) | 927.03 mi (1,491.90 km) |
| Preakness to Ocean Acres (New Jersey) | 82.63 mi (132.99 km) |
| Preakness to Ocean City (New Jersey) | 117.11 mi (188.47 km) |
| Preakness to Ocean Pines (Maryland) | 183.12 mi (294.71 km) |
| Preakness to Ocean Pointe (Hawaii) | 4,953.46 mi (7,971.82 km) |
| Preakness to Ocean Springs (Mississippi) | 1,091.49 mi (1,756.58 km) |
| Preakness to Oceanside (California) | 2,408.58 mi (3,876.23 km) |
| Preakness to Oceanside (New York) | 37.29 mi (60.02 km) |
| Preakness to Ocoee (Florida) | 948.45 mi (1,526.39 km) |
| Preakness to Oconomowoc (Wisconsin) | 746.61 mi (1,201.56 km) |
