| Keller to Oswego (Illinois) | 776.30 mi (1,249.34 km) |
| Keller to Oswego (New York) | 1,333.88 mi (2,146.67 km) |
| Keller to Otsego (Minnesota) | 873.50 mi (1,405.76 km) |
| Keller to Ottawa (Illinois) | 742.58 mi (1,195.07 km) |
| Keller to Ottawa (Kansas) | 406.62 mi (654.39 km) |
| Keller to Ottumwa (Iowa) | 618.23 mi (994.94 km) |
| Keller to Overland (Missouri) | 552.96 mi (889.90 km) |
| Keller to Overland Park (Kansas) | 435.13 mi (700.28 km) |
| Keller to Overlea (Maryland) | 1,234.30 mi (1,986.42 km) |
| Keller to Oviedo (Florida) | 995.46 mi (1,602.04 km) |
| Keller to Owasso (Oklahoma) | 244.94 mi (394.20 km) |
| Keller to Owatonna (Minnesota) | 800.33 mi (1,288.00 km) |
| Keller to Owensboro (Kentucky) | 659.45 mi (1,061.28 km) |
| Keller to Owings Mills (Maryland) | 1,221.01 mi (1,965.03 km) |
| Keller to Owosso (Michigan) | 992.03 mi (1,596.52 km) |
