| Gorna Oryahovitsa to Oakley (California) | 6,470.44 mi (10,413.17 km) |
| Gorna Oryahovitsa to Oakton (Virginia) | 5,006.22 mi (8,056.73 km) |
| Gorna Oryahovitsa to Oakville (Missouri) | 5,524.43 mi (8,890.71 km) |
| Gorna Oryahovitsa to Oatfield (Oregon) | 6,016.10 mi (9,681.98 km) |
| Gorna Oryahovitsa to Ocala (Florida) | 5,670.34 mi (9,125.53 km) |
| Gorna Oryahovitsa to Ocean Acres (New Jersey) | 4,845.60 mi (7,798.23 km) |
| Gorna Oryahovitsa to Ocean City (New Jersey) | 4,879.89 mi (7,853.42 km) |
| Gorna Oryahovitsa to Ocean Pines (Maryland) | 4,941.97 mi (7,953.34 km) |
| Gorna Oryahovitsa to Ocean Pointe (Hawaii) | 7,977.57 mi (12,838.66 km) |
| Gorna Oryahovitsa to Ocean Springs (Mississippi) | 5,880.71 mi (9,464.09 km) |
| Gorna Oryahovitsa to Oceanside (California) | 6,666.62 mi (10,728.89 km) |
| Gorna Oryahovitsa to Oceanside (New York) | 4,780.08 mi (7,692.80 km) |
| Gorna Oryahovitsa to Ocoee (Florida) | 5,673.50 mi (9,130.62 km) |
| Gorna Oryahovitsa to Oconomowoc (Wisconsin) | 5,223.14 mi (8,405.84 km) |
| Gorna Oryahovitsa to Odenton (Maryland) | 4,973.67 mi (8,004.35 km) |
