| Alpena to Orangevale (California) | 1,973.97 mi (3,176.79 km) |
| Alpena to Orchards (Washington) | 1,878.48 mi (3,023.12 km) |
| Alpena to Orcutt (California) | 2,060.15 mi (3,315.49 km) |
| Alpena to Oregon (Ohio) | 236.41 mi (380.47 km) |
| Alpena to Oregon (Wisconsin) | 330.74 mi (532.27 km) |
| Alpena to Oregon City (Oregon) | 1,886.91 mi (3,036.68 km) |
| Alpena to Orem (Utah) | 1,464.67 mi (2,357.15 km) |
| Alpena to Orinda (California) | 2,045.06 mi (3,291.21 km) |
| Alpena to Orland Park (Illinois) | 326.60 mi (525.61 km) |
| Alpena to Orlando (Florida) | 1,152.50 mi (1,854.77 km) |
| Alpena to Ormond Beach (Florida) | 1,097.43 mi (1,766.14 km) |
| Alpena to Oro Valley (Arizona) | 1,709.68 mi (2,751.47 km) |
| Alpena to Oroville (California) | 1,967.37 mi (3,166.18 km) |
| Alpena to Oshkosh (Wisconsin) | 262.39 mi (422.28 km) |
| Alpena to Oskaloosa (Iowa) | 531.62 mi (855.56 km) |
