| Keller to Oakley (California) | 1,416.17 mi (2,279.10 km) |
| Keller to Oakton (Virginia) | 1,185.42 mi (1,907.74 km) |
| Keller to Oakville (Missouri) | 543.12 mi (874.07 km) |
| Keller to Oatfield (Oregon) | 1,598.68 mi (2,572.83 km) |
| Keller to Ocala (Florida) | 928.24 mi (1,493.86 km) |
| Keller to Ocean Acres (New Jersey) | 1,356.27 mi (2,182.70 km) |
| Keller to Ocean City (New Jersey) | 1,332.37 mi (2,144.25 km) |
| Keller to Ocean Pines (Maryland) | 1,291.67 mi (2,078.75 km) |
| Keller to Ocean Pointe (Hawaii) | 3,773.71 mi (6,073.20 km) |
| Keller to Ocean Springs (Mississippi) | 525.86 mi (846.28 km) |
| Keller to Oceanside (California) | 1,161.06 mi (1,868.55 km) |
| Keller to Oceanside (New York) | 1,404.06 mi (2,259.61 km) |
| Keller to Ocoee (Florida) | 977.93 mi (1,573.82 km) |
| Keller to Oconomowoc (Wisconsin) | 846.99 mi (1,363.10 km) |
| Keller to Odenton (Maryland) | 1,220.06 mi (1,963.50 km) |
