| Security-Widefield to Oskaloosa (Iowa) | 661.95 mi (1,065.31 km) |
| Security-Widefield to Oswego (Illinois) | 886.04 mi (1,425.95 km) |
| Security-Widefield to Oswego (New York) | 1,496.81 mi (2,408.89 km) |
| Security-Widefield to Otsego (Minnesota) | 724.93 mi (1,166.66 km) |
| Security-Widefield to Ottawa (Illinois) | 858.06 mi (1,380.91 km) |
| Security-Widefield to Ottawa (Kansas) | 509.66 mi (820.22 km) |
| Security-Widefield to Ottumwa (Iowa) | 669.87 mi (1,078.06 km) |
| Security-Widefield to Overland (Missouri) | 772.50 mi (1,243.22 km) |
| Security-Widefield to Overland Park (Kansas) | 539.61 mi (868.42 km) |
| Security-Widefield to Overlea (Maryland) | 1,507.26 mi (2,425.70 km) |
| Security-Widefield to Oviedo (Florida) | 1,515.21 mi (2,438.49 km) |
| Security-Widefield to Owasso (Oklahoma) | 515.39 mi (829.43 km) |
| Security-Widefield to Owatonna (Minnesota) | 699.17 mi (1,125.21 km) |
| Security-Widefield to Owensboro (Kentucky) | 955.75 mi (1,538.13 km) |
| Security-Widefield to Owings Mills (Maryland) | 1,492.34 mi (2,401.70 km) |
