| Cologno al Serio to Oakley (California) | 5,921.37 mi (9,529.53 km) |
| Cologno al Serio to Oakton (Virginia) | 4,250.31 mi (6,840.22 km) |
| Cologno al Serio to Oakville (Missouri) | 4,808.07 mi (7,737.84 km) |
| Cologno al Serio to Oatfield (Oregon) | 5,509.69 mi (8,866.98 km) |
| Cologno al Serio to Ocala (Florida) | 4,893.41 mi (7,875.18 km) |
| Cologno al Serio to Ocean Acres (New Jersey) | 4,085.46 mi (6,574.91 km) |
| Cologno al Serio to Ocean City (New Jersey) | 4,118.61 mi (6,628.26 km) |
| Cologno al Serio to Ocean Pines (Maryland) | 4,178.54 mi (6,724.70 km) |
| Cologno al Serio to Ocean Pointe (Hawaii) | 7,750.71 mi (12,473.56 km) |
| Cologno al Serio to Ocean Springs (Mississippi) | 5,125.99 mi (8,249.48 km) |
| Cologno al Serio to Oceanside (California) | 6,064.14 mi (9,759.28 km) |
| Cologno al Serio to Oceanside (New York) | 4,022.09 mi (6,472.93 km) |
| Cologno al Serio to Ocoee (Florida) | 4,893.49 mi (7,875.32 km) |
| Cologno al Serio to Oconomowoc (Wisconsin) | 4,523.42 mi (7,279.74 km) |
| Cologno al Serio to Odenton (Maryland) | 4,216.90 mi (6,786.44 km) |
