| Takoma Park to Oskaloosa (Iowa) | 840.09 mi (1,351.99 km) |
| Takoma Park to Oswego (Illinois) | 624.95 mi (1,005.75 km) |
| Takoma Park to Oswego (New York) | 309.99 mi (498.88 km) |
| Takoma Park to Otsego (Minnesota) | 953.39 mi (1,534.33 km) |
| Takoma Park to Ottawa (Illinois) | 644.86 mi (1,037.81 km) |
| Takoma Park to Ottawa (Kansas) | 982.13 mi (1,580.58 km) |
| Takoma Park to Ottumwa (Iowa) | 826.86 mi (1,330.71 km) |
| Takoma Park to Overland (Missouri) | 718.96 mi (1,157.05 km) |
| Takoma Park to Overland Park (Kansas) | 948.97 mi (1,527.22 km) |
| Takoma Park to Overlea (Maryland) | 37.10 mi (59.71 km) |
| Takoma Park to Oviedo (Florida) | 752.36 mi (1,210.81 km) |
| Takoma Park to Owasso (Oklahoma) | 1,044.92 mi (1,681.63 km) |
| Takoma Park to Owatonna (Minnesota) | 908.56 mi (1,462.18 km) |
| Takoma Park to Owensboro (Kentucky) | 554.09 mi (891.72 km) |
| Takoma Park to Owings Mills (Maryland) | 31.83 mi (51.22 km) |
