| Catalina Foothills to Olympia Heights (Florida) | 1,893.76 mi (3,047.72 km) |
| Catalina Foothills to Omaha (Nebraska) | 1,025.48 mi (1,650.35 km) |
| Catalina Foothills to On Top of the World Designated Place (Florida) | 1,708.09 mi (2,748.91 km) |
| Catalina Foothills to Onalaska (Wisconsin) | 1,330.34 mi (2,140.98 km) |
| Catalina Foothills to Oneida (New York) | 2,046.30 mi (3,293.21 km) |
| Catalina Foothills to Oneonta (New York) | 2,069.70 mi (3,330.86 km) |
| Catalina Foothills to Ontario (California) | 406.75 mi (654.60 km) |
| Catalina Foothills to Ontario (Oregon) | 874.23 mi (1,406.93 km) |
| Catalina Foothills to Opa-locka (Florida) | 1,894.29 mi (3,048.57 km) |
| Catalina Foothills to Opelika (Alabama) | 1,483.25 mi (2,387.06 km) |
| Catalina Foothills to Opelousas (Louisiana) | 1,114.03 mi (1,792.85 km) |
| Catalina Foothills to Orange (California) | 414.83 mi (667.60 km) |
| Catalina Foothills to Orange (Texas) | 1,021.86 mi (1,644.53 km) |
| Catalina Foothills to Orange City (Florida) | 1,769.43 mi (2,847.62 km) |
| Catalina Foothills to Orangeburg (South Carolina) | 1,737.24 mi (2,795.82 km) |
