| Tryavna to Olympia Heights (Florida) | 5,761.90 mi (9,272.89 km) |
| Tryavna to Omaha (Nebraska) | 5,580.80 mi (8,981.43 km) |
| Tryavna to On Top of the World Designated Place (Florida) | 5,681.16 mi (9,142.94 km) |
| Tryavna to Onalaska (Wisconsin) | 5,282.49 mi (8,501.35 km) |
| Tryavna to Oneida (New York) | 4,756.32 mi (7,654.55 km) |
| Tryavna to Oneonta (New York) | 4,760.33 mi (7,661.00 km) |
| Tryavna to Ontario (California) | 6,634.54 mi (10,677.25 km) |
| Tryavna to Ontario (Oregon) | 6,001.22 mi (9,658.03 km) |
| Tryavna to Opa-locka (Florida) | 5,749.66 mi (9,253.18 km) |
| Tryavna to Opelika (Alabama) | 5,633.36 mi (9,066.01 km) |
| Tryavna to Opelousas (Louisiana) | 6,007.65 mi (9,668.38 km) |
| Tryavna to Orange (California) | 6,654.59 mi (10,709.52 km) |
| Tryavna to Orange (Texas) | 6,093.51 mi (9,806.56 km) |
| Tryavna to Orange City (Florida) | 5,646.88 mi (9,087.77 km) |
| Tryavna to Orangeburg (South Carolina) | 5,408.46 mi (8,704.08 km) |
