| Kelso to Orangevale (California) | 520.73 mi (838.03 km) |
| Kelso to Orchards (Washington) | 34.67 mi (55.79 km) |
| Kelso to Orcutt (California) | 788.24 mi (1,268.56 km) |
| Kelso to Oregon (Ohio) | 1,968.29 mi (3,167.65 km) |
| Kelso to Oregon (Wisconsin) | 1,652.56 mi (2,659.54 km) |
| Kelso to Oregon City (Oregon) | 55.90 mi (89.97 km) |
| Kelso to Orem (Utah) | 691.49 mi (1,112.85 km) |
| Kelso to Orinda (California) | 570.69 mi (918.43 km) |
| Kelso to Orland Park (Illinois) | 1,757.86 mi (2,829.01 km) |
| Kelso to Orlando (Florida) | 2,549.98 mi (4,103.79 km) |
| Kelso to Ormond Beach (Florida) | 2,524.80 mi (4,063.28 km) |
| Kelso to Oro Valley (Arizona) | 1,138.45 mi (1,832.16 km) |
| Kelso to Oroville (California) | 462.55 mi (744.41 km) |
| Kelso to Oshkosh (Wisconsin) | 1,668.24 mi (2,684.77 km) |
| Kelso to Oskaloosa (Iowa) | 1,537.39 mi (2,474.19 km) |
