| Florence-Graham to Orbetello | 6,265.59 mi (10,083.50 km) |
| Florence-Graham to Oria | 6,574.55 mi (10,580.71 km) |
| Florence-Graham to Oristano | 6,309.36 mi (10,153.93 km) |
| Florence-Graham to Orta Nova | 6,469.06 mi (10,410.94 km) |
| Florence-Graham to Orte | 6,302.47 mi (10,142.84 km) |
| Florence-Graham to Ortona | 6,372.16 mi (10,255.00 km) |
| Florence-Graham to Orvieto | 6,279.79 mi (10,106.34 km) |
| Florence-Graham to Orzinuovi | 6,068.36 mi (9,766.08 km) |
| Florence-Graham to Osimo | 6,281.88 mi (10,109.72 km) |
| Florence-Graham to Ospitaletto | 6,064.64 mi (9,760.10 km) |
| Florence-Graham to Ostuni | 6,559.89 mi (10,557.13 km) |
| Florence-Graham to Ottaviano | 6,456.69 mi (10,391.04 km) |
| Florence-Graham to Ovada | 6,066.57 mi (9,763.21 km) |
| Florence-Graham to Ozieri | 6,288.57 mi (10,120.48 km) |
| Florence-Graham to Paceco | 6,548.24 mi (10,538.37 km) |
