| Howard to Orangevale (California) | 1,745.61 mi (2,809.29 km) |
| Howard to Orchards (Washington) | 1,667.49 mi (2,683.56 km) |
| Howard to Orcutt (California) | 1,829.53 mi (2,944.34 km) |
| Howard to Oregon (Ohio) | 309.60 mi (498.26 km) |
| Howard to Oregon (Wisconsin) | 130.78 mi (210.47 km) |
| Howard to Oregon City (Oregon) | 1,674.69 mi (2,695.15 km) |
| Howard to Orem (Utah) | 1,234.72 mi (1,987.09 km) |
| Howard to Orinda (California) | 1,816.23 mi (2,922.95 km) |
| Howard to Orland Park (Illinois) | 205.04 mi (329.98 km) |
| Howard to Orlando (Florida) | 1,172.41 mi (1,886.82 km) |
| Howard to Ormond Beach (Florida) | 1,122.51 mi (1,806.51 km) |
| Howard to Oro Valley (Arizona) | 1,487.08 mi (2,393.22 km) |
| Howard to Oroville (California) | 1,740.20 mi (2,800.57 km) |
| Howard to Oshkosh (Wisconsin) | 44.38 mi (71.42 km) |
| Howard to Oskaloosa (Iowa) | 322.74 mi (519.40 km) |
