| Severn to Odenton (Maryland) | 4.80 mi (7.72 km) |
| Severn to Odessa (Texas) | 1,521.04 mi (2,447.88 km) |
| Severn to Ogden (Utah) | 1,854.78 mi (2,984.97 km) |
| Severn to Oildale (California) | 2,320.34 mi (3,734.23 km) |
| Severn to Ojus (Florida) | 932.47 mi (1,500.67 km) |
| Severn to Okemos (Michigan) | 472.16 mi (759.86 km) |
| Severn to Oklahoma City (Oklahoma) | 1,169.10 mi (1,881.49 km) |
| Severn to Okmulgee (Oklahoma) | 1,085.63 mi (1,747.16 km) |
| Severn to Olathe (Kansas) | 971.61 mi (1,563.65 km) |
| Severn to Old Jamestown (Missouri) | 729.41 mi (1,173.87 km) |
| Severn to Oldsmar (Florida) | 839.00 mi (1,350.24 km) |
| Severn to Olean (New York) | 223.01 mi (358.90 km) |
| Severn to Olive Branch (Mississippi) | 779.54 mi (1,254.55 km) |
| Severn to Olivehurst (California) | 2,379.88 mi (3,830.05 km) |
| Severn to Olney (Maryland) | 20.16 mi (32.44 km) |
