| McCalla to Oswego (Illinois) | 583.47 mi (939.01 km) |
| McCalla to Oswego (New York) | 902.35 mi (1,452.19 km) |
| McCalla to Otsego (Minnesota) | 897.82 mi (1,444.89 km) |
| McCalla to Ottawa (Illinois) | 565.06 mi (909.38 km) |
| McCalla to Ottawa (Kansas) | 587.81 mi (945.99 km) |
| McCalla to Ottumwa (Iowa) | 609.88 mi (981.51 km) |
| McCalla to Overland (Missouri) | 416.74 mi (670.68 km) |
| McCalla to Overland Park (Kansas) | 575.47 mi (926.13 km) |
| McCalla to Overlea (Maryland) | 718.78 mi (1,156.76 km) |
| McCalla to Oviedo (Florida) | 471.81 mi (759.31 km) |
| McCalla to Owasso (Oklahoma) | 540.01 mi (869.06 km) |
| McCalla to Owatonna (Minnesota) | 816.39 mi (1,313.85 km) |
| McCalla to Owensboro (Kentucky) | 307.86 mi (495.46 km) |
| McCalla to Owings Mills (Maryland) | 708.27 mi (1,139.86 km) |
| McCalla to Owosso (Michigan) | 687.34 mi (1,106.16 km) |
