| Pecos to Oskaloosa (Iowa) | 911.73 mi (1,467.29 km) |
| Pecos to Oswego (Illinois) | 1,099.52 mi (1,769.51 km) |
| Pecos to Oswego (New York) | 1,689.41 mi (2,718.85 km) |
| Pecos to Otsego (Minnesota) | 1,096.27 mi (1,764.28 km) |
| Pecos to Ottawa (Illinois) | 1,065.78 mi (1,715.20 km) |
| Pecos to Ottawa (Kansas) | 682.05 mi (1,097.65 km) |
| Pecos to Ottumwa (Iowa) | 906.80 mi (1,459.36 km) |
| Pecos to Overland (Missouri) | 897.27 mi (1,444.02 km) |
| Pecos to Overland Park (Kansas) | 718.21 mi (1,155.85 km) |
| Pecos to Overlea (Maryland) | 1,610.27 mi (2,591.48 km) |
| Pecos to Oviedo (Florida) | 1,346.92 mi (2,167.65 km) |
| Pecos to Owasso (Oklahoma) | 555.44 mi (893.90 km) |
| Pecos to Owatonna (Minnesota) | 1,039.87 mi (1,673.50 km) |
| Pecos to Owensboro (Kentucky) | 1,029.46 mi (1,656.75 km) |
| Pecos to Owings Mills (Maryland) | 1,596.63 mi (2,569.52 km) |
