| Severn to Orangeburg (South Carolina) | 453.67 mi (730.11 km) |
| Severn to Orangevale (California) | 2,369.39 mi (3,813.17 km) |
| Severn to Orchards (Washington) | 2,348.44 mi (3,779.44 km) |
| Severn to Orcutt (California) | 2,407.40 mi (3,874.34 km) |
| Severn to Oregon (Ohio) | 394.69 mi (635.19 km) |
| Severn to Oregon (Wisconsin) | 710.63 mi (1,143.65 km) |
| Severn to Oregon City (Oregon) | 2,353.85 mi (3,788.16 km) |
| Severn to Orem (Utah) | 1,849.95 mi (2,977.21 km) |
| Severn to Orinda (California) | 2,434.60 mi (3,918.11 km) |
| Severn to Orland Park (Illinois) | 611.59 mi (984.25 km) |
| Severn to Orlando (Florida) | 782.82 mi (1,259.83 km) |
| Severn to Ormond Beach (Florida) | 724.52 mi (1,166.01 km) |
| Severn to Oro Valley (Arizona) | 1,964.33 mi (3,161.28 km) |
| Severn to Oroville (California) | 2,373.02 mi (3,819.01 km) |
| Severn to Oshkosh (Wisconsin) | 699.15 mi (1,125.17 km) |
