| Severna Park to Odenton (Maryland) | 6.86 mi (11.05 km) |
| Severna Park to Odessa (Texas) | 1,527.07 mi (2,457.57 km) |
| Severna Park to Ogden (Utah) | 1,862.24 mi (2,996.98 km) |
| Severna Park to Oildale (California) | 2,327.51 mi (3,745.77 km) |
| Severna Park to Ojus (Florida) | 930.83 mi (1,498.03 km) |
| Severna Park to Okemos (Michigan) | 479.67 mi (771.96 km) |
| Severna Park to Oklahoma City (Oklahoma) | 1,175.53 mi (1,891.83 km) |
| Severna Park to Okmulgee (Oklahoma) | 1,091.99 mi (1,757.39 km) |
| Severna Park to Olathe (Kansas) | 978.67 mi (1,575.02 km) |
| Severna Park to Old Jamestown (Missouri) | 736.37 mi (1,185.07 km) |
| Severna Park to Oldsmar (Florida) | 839.00 mi (1,350.24 km) |
| Severna Park to Olean (New York) | 228.85 mi (368.30 km) |
| Severna Park to Olive Branch (Mississippi) | 785.03 mi (1,263.39 km) |
| Severna Park to Olivehurst (California) | 2,387.31 mi (3,842.01 km) |
| Severna Park to Olney (Maryland) | 27.27 mi (43.88 km) |
