| Pikesville to Oakleaf Plantation (Florida) | 700.14 mi (1,126.77 km) |
| Pikesville to Oakley (California) | 2,402.98 mi (3,867.23 km) |
| Pikesville to Oakton (Virginia) | 47.21 mi (75.98 km) |
| Pikesville to Oakville (Missouri) | 734.24 mi (1,181.65 km) |
| Pikesville to Oatfield (Oregon) | 2,345.51 mi (3,774.74 km) |
| Pikesville to Ocala (Florida) | 770.66 mi (1,240.25 km) |
| Pikesville to Ocean Acres (New Jersey) | 131.27 mi (211.25 km) |
| Pikesville to Ocean City (New Jersey) | 112.54 mi (181.12 km) |
| Pikesville to Ocean Pines (Maryland) | 108.59 mi (174.76 km) |
| Pikesville to Ocean Pointe (Hawaii) | 4,848.26 mi (7,802.51 km) |
| Pikesville to Ocean Springs (Mississippi) | 922.52 mi (1,484.66 km) |
| Pikesville to Oceanside (California) | 2,281.05 mi (3,670.99 km) |
| Pikesville to Oceanside (New York) | 183.56 mi (295.41 km) |
| Pikesville to Ocoee (Florida) | 796.17 mi (1,281.31 km) |
| Pikesville to Oconomowoc (Wisconsin) | 663.36 mi (1,067.58 km) |
