| Severna Park to Oskaloosa (Iowa) | 860.55 mi (1,384.93 km) |
| Severna Park to Oswego (Illinois) | 644.22 mi (1,036.77 km) |
| Severna Park to Oswego (New York) | 301.59 mi (485.35 km) |
| Severna Park to Otsego (Minnesota) | 969.26 mi (1,559.87 km) |
| Severna Park to Ottawa (Illinois) | 664.75 mi (1,069.82 km) |
| Severna Park to Ottawa (Kansas) | 1,004.84 mi (1,617.14 km) |
| Severna Park to Ottumwa (Iowa) | 847.60 mi (1,364.09 km) |
| Severna Park to Overland (Missouri) | 741.92 mi (1,194.00 km) |
| Severna Park to Overland Park (Kansas) | 971.53 mi (1,563.53 km) |
| Severna Park to Overlea (Maryland) | 19.35 mi (31.14 km) |
| Severna Park to Oviedo (Florida) | 767.43 mi (1,235.07 km) |
| Severna Park to Owasso (Oklahoma) | 1,068.71 mi (1,719.92 km) |
| Severna Park to Owatonna (Minnesota) | 925.78 mi (1,489.91 km) |
| Severna Park to Owensboro (Kentucky) | 578.00 mi (930.20 km) |
| Severna Park to Owings Mills (Maryland) | 25.39 mi (40.86 km) |
