| Ferguson to Oswego (Illinois) | 227.53 mi (366.17 km) |
| Ferguson to Oswego (New York) | 787.01 mi (1,266.57 km) |
| Ferguson to Otsego (Minnesota) | 481.44 mi (774.80 km) |
| Ferguson to Ottawa (Illinois) | 196.12 mi (315.63 km) |
| Ferguson to Ottawa (Kansas) | 268.18 mi (431.60 km) |
| Ferguson to Ottumwa (Iowa) | 193.08 mi (310.74 km) |
| Ferguson to Overland (Missouri) | 5.38 mi (8.66 km) |
| Ferguson to Overland Park (Kansas) | 236.61 mi (380.78 km) |
| Ferguson to Overlea (Maryland) | 739.70 mi (1,190.43 km) |
| Ferguson to Oviedo (Florida) | 870.83 mi (1,401.47 km) |
| Ferguson to Owasso (Oklahoma) | 347.70 mi (559.57 km) |
| Ferguson to Owatonna (Minnesota) | 399.16 mi (642.38 km) |
| Ferguson to Owensboro (Kentucky) | 185.52 mi (298.56 km) |
| Ferguson to Owings Mills (Maryland) | 725.03 mi (1,166.83 km) |
| Ferguson to Owosso (Michigan) | 433.70 mi (697.98 km) |
