| Brenham to Orbetello | 5,638.42 mi (9,074.16 km) |
| Brenham to Oria | 5,986.50 mi (9,634.34 km) |
| Brenham to Oristano | 5,619.27 mi (9,043.35 km) |
| Brenham to Orta Nova | 5,871.84 mi (9,449.82 km) |
| Brenham to Orte | 5,687.25 mi (9,152.74 km) |
| Brenham to Ortona | 5,775.84 mi (9,295.31 km) |
| Brenham to Orvieto | 5,665.62 mi (9,117.94 km) |
| Brenham to Orzinuovi | 5,473.66 mi (8,809.00 km) |
| Brenham to Osimo | 5,692.78 mi (9,161.64 km) |
| Brenham to Ospitaletto | 5,473.64 mi (8,808.97 km) |
| Brenham to Ostuni | 5,974.57 mi (9,615.14 km) |
| Brenham to Ottaviano | 5,839.51 mi (9,397.78 km) |
| Brenham to Ovada | 5,448.24 mi (8,768.09 km) |
| Brenham to Ozieri | 5,612.45 mi (9,032.36 km) |
| Brenham to Paceco | 5,869.92 mi (9,446.72 km) |
