| Gallatin to Oswego (Illinois) | 379.98 mi (611.52 km) |
| Gallatin to Oswego (New York) | 718.74 mi (1,156.69 km) |
| Gallatin to Otsego (Minnesota) | 718.25 mi (1,155.92 km) |
| Gallatin to Ottawa (Illinois) | 366.47 mi (589.78 km) |
| Gallatin to Ottawa (Kansas) | 505.70 mi (813.85 km) |
| Gallatin to Ottumwa (Iowa) | 453.36 mi (729.61 km) |
| Gallatin to Overland (Missouri) | 266.97 mi (429.64 km) |
| Gallatin to Overland Park (Kansas) | 481.66 mi (775.15 km) |
| Gallatin to Overlea (Maryland) | 580.30 mi (933.90 km) |
| Gallatin to Oviedo (Florida) | 615.56 mi (990.65 km) |
| Gallatin to Owasso (Oklahoma) | 520.89 mi (838.29 km) |
| Gallatin to Owatonna (Minnesota) | 640.72 mi (1,031.14 km) |
| Gallatin to Owensboro (Kentucky) | 101.76 mi (163.77 km) |
| Gallatin to Owings Mills (Maryland) | 567.43 mi (913.18 km) |
| Gallatin to Owosso (Michigan) | 473.14 mi (761.45 km) |
