| Momchilgrad to Oswego (Illinois) | 5,357.53 mi (8,622.12 km) |
| Momchilgrad to Oswego (New York) | 4,829.06 mi (7,771.62 km) |
| Momchilgrad to Otsego (Minnesota) | 5,359.34 mi (8,625.03 km) |
| Momchilgrad to Ottawa (Illinois) | 5,391.42 mi (8,676.65 km) |
| Momchilgrad to Ottawa (Kansas) | 5,761.51 mi (9,272.26 km) |
| Momchilgrad to Ottumwa (Iowa) | 5,536.27 mi (8,909.77 km) |
| Momchilgrad to Overland (Missouri) | 5,580.68 mi (8,981.24 km) |
| Momchilgrad to Overland Park (Kansas) | 5,726.22 mi (9,215.46 km) |
| Momchilgrad to Overlea (Maryland) | 5,008.61 mi (8,060.57 km) |
| Momchilgrad to Oviedo (Florida) | 5,701.16 mi (9,175.13 km) |
| Momchilgrad to Owasso (Oklahoma) | 5,903.65 mi (9,501.01 km) |
| Momchilgrad to Owatonna (Minnesota) | 5,406.75 mi (8,701.32 km) |
| Momchilgrad to Owensboro (Kentucky) | 5,505.15 mi (8,859.68 km) |
| Momchilgrad to Owings Mills (Maryland) | 5,017.73 mi (8,075.26 km) |
| Momchilgrad to Owosso (Michigan) | 5,141.99 mi (8,275.24 km) |
