| Cologno al Serio to Orangevale (California) | 5,867.01 mi (9,442.04 km) |
| Cologno al Serio to Orchards (Washington) | 5,491.83 mi (8,838.25 km) |
| Cologno al Serio to Orcutt (California) | 6,066.69 mi (9,763.39 km) |
| Cologno al Serio to Oregon (Ohio) | 4,387.69 mi (7,061.31 km) |
| Cologno al Serio to Oregon (Wisconsin) | 4,565.55 mi (7,347.54 km) |
| Cologno al Serio to Oregon City (Oregon) | 5,513.80 mi (8,873.60 km) |
| Cologno al Serio to Orem (Utah) | 5,486.37 mi (8,829.46 km) |
| Cologno al Serio to Orinda (California) | 5,941.79 mi (9,562.39 km) |
| Cologno al Serio to Orland Park (Illinois) | 4,565.83 mi (7,348.00 km) |
| Cologno al Serio to Orlando (Florida) | 4,889.41 mi (7,868.75 km) |
| Cologno al Serio to Ormond Beach (Florida) | 4,840.84 mi (7,790.58 km) |
| Cologno al Serio to Oro Valley (Arizona) | 5,895.29 mi (9,487.55 km) |
| Cologno al Serio to Oroville (California) | 5,829.17 mi (9,381.14 km) |
| Cologno al Serio to Oshkosh (Wisconsin) | 4,484.77 mi (7,217.53 km) |
| Cologno al Serio to Oskaloosa (Iowa) | 4,764.92 mi (7,668.40 km) |
