| Sofia to Odessa (Texas) | 6,241.26 mi (10,044.33 km) |
| Sofia to Ogden (Utah) | 6,004.20 mi (9,662.83 km) |
| Sofia to Oildale (California) | 6,539.68 mi (10,524.60 km) |
| Sofia to Ojus (Florida) | 5,651.67 mi (9,095.48 km) |
| Sofia to Okemos (Michigan) | 5,031.41 mi (8,097.27 km) |
| Sofia to Oklahoma City (Oklahoma) | 5,875.04 mi (9,454.97 km) |
| Sofia to Okmulgee (Oklahoma) | 5,813.18 mi (9,355.41 km) |
| Sofia to Olathe (Kansas) | 5,599.06 mi (9,010.82 km) |
| Sofia to Old Jamestown (Missouri) | 5,437.45 mi (8,750.73 km) |
| Sofia to Oldsmar (Florida) | 5,661.81 mi (9,111.81 km) |
| Sofia to Olean (New York) | 4,831.10 mi (7,774.90 km) |
| Sofia to Olive Branch (Mississippi) | 5,616.12 mi (9,038.27 km) |
| Sofia to Olivehurst (California) | 6,373.47 mi (10,257.11 km) |
| Sofia to Olney (Maryland) | 4,907.07 mi (7,897.16 km) |
| Sofia to Olympia (Washington) | 5,901.31 mi (9,497.24 km) |
