| Pikesville to Odenton (Maryland) | 22.34 mi (35.95 km) |
| Pikesville to Odessa (Texas) | 1,524.24 mi (2,453.02 km) |
| Pikesville to Ogden (Utah) | 1,849.72 mi (2,976.83 km) |
| Pikesville to Oildale (California) | 2,317.86 mi (3,730.23 km) |
| Pikesville to Ojus (Florida) | 949.46 mi (1,528.00 km) |
| Pikesville to Okemos (Michigan) | 462.30 mi (744.00 km) |
| Pikesville to Oklahoma City (Oklahoma) | 1,170.72 mi (1,884.10 km) |
| Pikesville to Okmulgee (Oklahoma) | 1,087.54 mi (1,750.22 km) |
| Pikesville to Olathe (Kansas) | 969.98 mi (1,561.03 km) |
| Pikesville to Old Jamestown (Missouri) | 728.45 mi (1,172.33 km) |
| Pikesville to Oldsmar (Florida) | 854.67 mi (1,375.45 km) |
| Pikesville to Olean (New York) | 206.91 mi (332.98 km) |
| Pikesville to Olive Branch (Mississippi) | 784.70 mi (1,262.85 km) |
| Pikesville to Olivehurst (California) | 2,375.21 mi (3,822.54 km) |
| Pikesville to Olney (Maryland) | 25.92 mi (41.72 km) |
