| Blagoevgrad to Olympia Heights (Florida) | 5,682.15 mi (9,144.53 km) |
| Blagoevgrad to Omaha (Nebraska) | 5,544.48 mi (8,922.97 km) |
| Blagoevgrad to On Top of the World Designated Place (Florida) | 5,608.63 mi (9,026.22 km) |
| Blagoevgrad to Onalaska (Wisconsin) | 5,244.03 mi (8,439.46 km) |
| Blagoevgrad to Oneida (New York) | 4,698.67 mi (7,561.78 km) |
| Blagoevgrad to Oneonta (New York) | 4,700.93 mi (7,565.42 km) |
| Blagoevgrad to Ontario (California) | 6,622.03 mi (10,657.13 km) |
| Blagoevgrad to Ontario (Oregon) | 5,998.59 mi (9,653.79 km) |
| Blagoevgrad to Opa-locka (Florida) | 5,670.05 mi (9,125.06 km) |
| Blagoevgrad to Opelika (Alabama) | 5,569.99 mi (8,964.04 km) |
| Blagoevgrad to Opelousas (Louisiana) | 5,950.10 mi (9,575.77 km) |
| Blagoevgrad to Orange (California) | 6,642.20 mi (10,689.59 km) |
| Blagoevgrad to Orange (Texas) | 6,037.76 mi (9,716.84 km) |
| Blagoevgrad to Orange City (Florida) | 5,572.87 mi (8,968.67 km) |
| Blagoevgrad to Orangeburg (South Carolina) | 5,340.76 mi (8,595.12 km) |
