| Bayou Blue to Orbetello | 5,415.01 mi (8,714.62 km) |
| Bayou Blue to Oria | 5,768.02 mi (9,282.74 km) |
| Bayou Blue to Oristano | 5,381.39 mi (8,660.51 km) |
| Bayou Blue to Orta Nova | 5,652.63 mi (9,097.03 km) |
| Bayou Blue to Orte | 5,466.06 mi (8,796.77 km) |
| Bayou Blue to Ortona | 5,558.01 mi (8,944.76 km) |
| Bayou Blue to Orvieto | 5,444.95 mi (8,762.80 km) |
| Bayou Blue to Orzinuovi | 5,260.03 mi (8,465.20 km) |
| Bayou Blue to Osimo | 5,477.70 mi (8,815.51 km) |
| Bayou Blue to Ospitaletto | 5,260.89 mi (8,466.59 km) |
| Bayou Blue to Ostuni | 5,756.87 mi (9,264.79 km) |
| Bayou Blue to Ottaviano | 5,616.02 mi (9,038.12 km) |
| Bayou Blue to Ovada | 5,229.26 mi (8,415.68 km) |
| Bayou Blue to Ozieri | 5,377.88 mi (8,654.86 km) |
| Bayou Blue to Paceco | 5,631.97 mi (9,063.78 km) |
