| Marshall to Oswego (Illinois) | 713.10 mi (1,147.63 km) |
| Marshall to Oswego (New York) | 1,225.75 mi (1,972.65 km) |
| Marshall to Otsego (Minnesota) | 880.36 mi (1,416.80 km) |
| Marshall to Ottawa (Illinois) | 681.04 mi (1,096.03 km) |
| Marshall to Ottawa (Kansas) | 422.00 mi (679.15 km) |
| Marshall to Ottumwa (Iowa) | 595.72 mi (958.72 km) |
| Marshall to Overland (Missouri) | 480.66 mi (773.55 km) |
| Marshall to Overland Park (Kansas) | 439.14 mi (706.74 km) |
| Marshall to Overlea (Maryland) | 1,100.77 mi (1,771.52 km) |
| Marshall to Oviedo (Florida) | 826.81 mi (1,330.62 km) |
| Marshall to Owasso (Oklahoma) | 272.52 mi (438.58 km) |
| Marshall to Owatonna (Minnesota) | 800.60 mi (1,288.44 km) |
| Marshall to Owensboro (Kentucky) | 544.78 mi (876.74 km) |
| Marshall to Owings Mills (Maryland) | 1,088.17 mi (1,751.24 km) |
| Marshall to Owosso (Michigan) | 910.14 mi (1,464.72 km) |
