| Gulf Shores to Orbetello | 5,252.97 mi (8,453.83 km) |
| Gulf Shores to Oria | 5,607.26 mi (9,024.01 km) |
| Gulf Shores to Oristano | 5,214.74 mi (8,392.31 km) |
| Gulf Shores to Orta Nova | 5,491.74 mi (8,838.10 km) |
| Gulf Shores to Orte | 5,304.70 mi (8,537.09 km) |
| Gulf Shores to Ortona | 5,397.69 mi (8,686.74 km) |
| Gulf Shores to Orvieto | 5,283.78 mi (8,503.43 km) |
| Gulf Shores to Orzinuovi | 5,101.45 mi (8,209.98 km) |
| Gulf Shores to Osimo | 5,318.38 mi (8,559.11 km) |
| Gulf Shores to Ospitaletto | 5,102.62 mi (8,211.87 km) |
| Gulf Shores to Ostuni | 5,596.38 mi (9,006.50 km) |
| Gulf Shores to Ottaviano | 5,453.76 mi (8,776.97 km) |
| Gulf Shores to Ovada | 5,068.89 mi (8,157.59 km) |
| Gulf Shores to Ozieri | 5,212.27 mi (8,388.34 km) |
| Gulf Shores to Paceco | 5,465.10 mi (8,795.23 km) |
