| McKinney to Orbetello | 5,502.20 mi (8,854.93 km) |
| McKinney to Oria | 5,846.55 mi (9,409.11 km) |
| McKinney to Oristano | 5,492.39 mi (8,839.15 km) |
| McKinney to Orta Nova | 5,732.58 mi (9,225.69 km) |
| McKinney to Orte | 5,549.56 mi (8,931.16 km) |
| McKinney to Ortona | 5,635.95 mi (9,070.19 km) |
| McKinney to Orvieto | 5,527.68 mi (8,895.94 km) |
| McKinney to Orzinuovi | 5,331.99 mi (8,581.01 km) |
| McKinney to Osimo | 5,551.47 mi (8,934.23 km) |
| McKinney to Ospitaletto | 5,331.46 mi (8,580.16 km) |
| McKinney to Ostuni | 5,834.18 mi (9,389.21 km) |
| McKinney to Ottaviano | 5,702.89 mi (9,177.91 km) |
| McKinney to Ovada | 5,309.76 mi (8,545.23 km) |
| McKinney to Ozieri | 5,483.37 mi (8,824.63 km) |
| McKinney to Paceco | 5,742.50 mi (9,241.66 km) |
