| Allouez to Orbetello | 4,640.13 mi (7,467.57 km) |
| Allouez to Oria | 4,976.80 mi (8,009.38 km) |
| Allouez to Oristano | 4,648.09 mi (7,480.37 km) |
| Allouez to Orta Nova | 4,864.35 mi (7,828.42 km) |
| Allouez to Orte | 4,684.73 mi (7,539.35 km) |
| Allouez to Ortona | 4,767.05 mi (7,671.82 km) |
| Allouez to Orvieto | 4,662.48 mi (7,503.54 km) |
| Allouez to Orzinuovi | 4,461.22 mi (7,179.64 km) |
| Allouez to Osimo | 4,680.51 mi (7,532.55 km) |
| Allouez to Ospitaletto | 4,459.85 mi (7,177.43 km) |
| Allouez to Ostuni | 4,963.76 mi (7,988.40 km) |
| Allouez to Ottaviano | 4,839.30 mi (7,788.10 km) |
| Allouez to Ovada | 4,444.51 mi (7,152.75 km) |
| Allouez to Ozieri | 4,634.77 mi (7,458.94 km) |
| Allouez to Paceco | 4,895.78 mi (7,879.00 km) |
