| Fergus Falls to Oswego (Illinois) | 498.70 mi (802.58 km) |
| Fergus Falls to Oswego (New York) | 975.70 mi (1,570.23 km) |
| Fergus Falls to Otsego (Minnesota) | 137.71 mi (221.62 km) |
| Fergus Falls to Ottawa (Illinois) | 496.24 mi (798.62 km) |
| Fergus Falls to Ottawa (Kansas) | 532.64 mi (857.20 km) |
| Fergus Falls to Ottumwa (Iowa) | 407.08 mi (655.13 km) |
| Fergus Falls to Overland (Missouri) | 599.17 mi (964.26 km) |
| Fergus Falls to Overland Park (Kansas) | 516.02 mi (830.45 km) |
| Fergus Falls to Overlea (Maryland) | 1,096.50 mi (1,764.65 km) |
| Fergus Falls to Oviedo (Florida) | 1,460.80 mi (2,350.92 km) |
| Fergus Falls to Owasso (Oklahoma) | 690.88 mi (1,111.87 km) |
| Fergus Falls to Owatonna (Minnesota) | 205.33 mi (330.45 km) |
| Fergus Falls to Owensboro (Kentucky) | 746.39 mi (1,201.19 km) |
| Fergus Falls to Owings Mills (Maryland) | 1,082.39 mi (1,741.94 km) |
| Fergus Falls to Owosso (Michigan) | 626.85 mi (1,008.81 km) |
