| Glen Burnie to Oswego (Illinois) | 640.67 mi (1,031.06 km) |
| Glen Burnie to Oswego (New York) | 296.85 mi (477.73 km) |
| Glen Burnie to Otsego (Minnesota) | 965.01 mi (1,553.03 km) |
| Glen Burnie to Ottawa (Illinois) | 661.37 mi (1,064.37 km) |
| Glen Burnie to Ottawa (Kansas) | 1,002.47 mi (1,613.32 km) |
| Glen Burnie to Ottumwa (Iowa) | 844.46 mi (1,359.02 km) |
| Glen Burnie to Overland (Missouri) | 739.69 mi (1,190.41 km) |
| Glen Burnie to Overland Park (Kansas) | 969.09 mi (1,559.59 km) |
| Glen Burnie to Overlea (Maryland) | 15.16 mi (24.40 km) |
| Glen Burnie to Oviedo (Florida) | 771.12 mi (1,241.00 km) |
| Glen Burnie to Owasso (Oklahoma) | 1,067.03 mi (1,717.22 km) |
| Glen Burnie to Owatonna (Minnesota) | 921.78 mi (1,483.46 km) |
| Glen Burnie to Owensboro (Kentucky) | 576.46 mi (927.72 km) |
| Glen Burnie to Owings Mills (Maryland) | 20.22 mi (32.53 km) |
| Glen Burnie to Owosso (Michigan) | 474.87 mi (764.23 km) |
