| Barrow in Furness to Orangevale (California) | 5,046.90 mi (8,122.19 km) |
| Barrow in Furness to Orchards (Washington) | 4,678.38 mi (7,529.12 km) |
| Barrow in Furness to Orcutt (California) | 5,245.28 mi (8,441.46 km) |
| Barrow in Furness to Oregon (Ohio) | 3,606.48 mi (5,804.07 km) |
| Barrow in Furness to Oregon (Wisconsin) | 3,766.70 mi (6,061.92 km) |
| Barrow in Furness to Oregon City (Oregon) | 4,700.03 mi (7,563.98 km) |
| Barrow in Furness to Orem (Utah) | 4,665.41 mi (7,508.25 km) |
| Barrow in Furness to Orinda (California) | 5,121.86 mi (8,242.83 km) |
| Barrow in Furness to Orland Park (Illinois) | 3,774.16 mi (6,073.93 km) |
| Barrow in Furness to Orlando (Florida) | 4,180.03 mi (6,727.11 km) |
| Barrow in Furness to Ormond Beach (Florida) | 4,128.05 mi (6,643.45 km) |
| Barrow in Furness to Oro Valley (Arizona) | 5,080.55 mi (8,176.36 km) |
| Barrow in Furness to Oroville (California) | 5,009.66 mi (8,062.27 km) |
| Barrow in Furness to Oshkosh (Wisconsin) | 3,684.34 mi (5,929.38 km) |
| Barrow in Furness to Oskaloosa (Iowa) | 3,964.31 mi (6,379.94 km) |
