| Varna to Olympia Heights (Florida) | 5,855.49 mi (9,423.49 km) |
| Varna to Omaha (Nebraska) | 5,640.28 mi (9,077.16 km) |
| Varna to On Top of the World Designated Place (Florida) | 5,769.37 mi (9,284.91 km) |
| Varna to Onalaska (Wisconsin) | 5,343.99 mi (8,600.33 km) |
| Varna to Oneida (New York) | 4,833.68 mi (7,779.06 km) |
| Varna to Oneonta (New York) | 4,839.06 mi (7,787.72 km) |
| Varna to Ontario (California) | 6,672.76 mi (10,738.78 km) |
| Varna to Ontario (Oregon) | 6,031.39 mi (9,706.58 km) |
| Varna to Opa-locka (Florida) | 5,843.14 mi (9,403.63 km) |
| Varna to Opelika (Alabama) | 5,714.57 mi (9,196.70 km) |
| Varna to Opelousas (Louisiana) | 6,084.03 mi (9,791.31 km) |
| Varna to Orange (California) | 6,692.69 mi (10,770.84 km) |
| Varna to Orange (Texas) | 6,168.41 mi (9,927.09 km) |
| Varna to Orange City (Florida) | 5,736.24 mi (9,231.58 km) |
| Varna to Orangeburg (South Carolina) | 5,493.16 mi (8,840.39 km) |
