| Catalina Foothills to Oerlinghausen | 5,565.79 mi (8,957.27 km) |
| Catalina Foothills to Oestrich-Winkel | 5,634.51 mi (9,067.87 km) |
| Catalina Foothills to Offenburg | 5,702.63 mi (9,177.50 km) |
| Catalina Foothills to Oftersheim | 5,682.98 mi (9,145.87 km) |
| Catalina Foothills to Ohrdruf | 5,684.59 mi (9,148.47 km) |
| Catalina Foothills to Ohringen | 5,721.40 mi (9,207.71 km) |
| Catalina Foothills to Olbernhau | 5,773.67 mi (9,291.82 km) |
| Catalina Foothills to Olching | 5,829.06 mi (9,380.97 km) |
| Catalina Foothills to Oldenburg | 5,497.59 mi (8,847.52 km) |
| Catalina Foothills to Oldenburg in Holstein | 5,524.73 mi (8,891.19 km) |
| Catalina Foothills to Olfen | 5,536.09 mi (8,909.47 km) |
| Catalina Foothills to Olpe | 5,582.52 mi (8,984.20 km) |
| Catalina Foothills to Olsberg | 5,588.32 mi (8,993.53 km) |
| Catalina Foothills to Oranienburg | 5,668.45 mi (9,122.48 km) |
| Catalina Foothills to Ortenberg | 5,652.83 mi (9,097.35 km) |
