| Kilgore to Olympia Heights (Florida) | 989.52 mi (1,592.47 km) |
| Kilgore to Omaha (Nebraska) | 616.01 mi (991.38 km) |
| Kilgore to On Top of the World Designated Place (Florida) | 779.90 mi (1,255.13 km) |
| Kilgore to Onalaska (Wisconsin) | 818.11 mi (1,316.61 km) |
| Kilgore to Oneida (New York) | 1,277.49 mi (2,055.92 km) |
| Kilgore to Oneonta (New York) | 1,284.39 mi (2,067.02 km) |
| Kilgore to Ontario (California) | 1,316.96 mi (2,119.44 km) |
| Kilgore to Ontario (Oregon) | 1,437.32 mi (2,313.15 km) |
| Kilgore to Opa-locka (Florida) | 987.77 mi (1,589.67 km) |
| Kilgore to Opelika (Alabama) | 552.55 mi (889.25 km) |
| Kilgore to Opelousas (Louisiana) | 208.70 mi (335.87 km) |
| Kilgore to Orange (California) | 1,329.82 mi (2,140.13 km) |
| Kilgore to Orange (Texas) | 170.10 mi (273.74 km) |
| Kilgore to Orange City (Florida) | 840.63 mi (1,352.86 km) |
| Kilgore to Orangeburg (South Carolina) | 814.25 mi (1,310.40 km) |
