| Duncan to Montana | 5,900.82 mi (9,496.45 km) |
| Duncan to Nova Zagora | 6,044.55 mi (9,727.76 km) |
| Duncan to Novi Iskar | 5,935.09 mi (9,551.61 km) |
| Duncan to Novi Pazar | 6,041.75 mi (9,723.25 km) |
| Duncan to Omurtag | 6,027.73 mi (9,700.70 km) |
| Duncan to Panagyurishte | 5,979.59 mi (9,623.22 km) |
| Duncan to Parvomay | 6,036.16 mi (9,714.26 km) |
| Duncan to Pavlikeni | 5,982.71 mi (9,628.24 km) |
| Duncan to Pazardzhik | 5,999.78 mi (9,655.71 km) |
| Duncan to Pernik | 5,933.49 mi (9,549.04 km) |
| Duncan to Peshtera | 6,006.84 mi (9,667.07 km) |
| Duncan to Petrich | 5,998.65 mi (9,653.89 km) |
| Duncan to Pleven | 5,950.06 mi (9,575.70 km) |
| Duncan to Plovdiv | 6,017.11 mi (9,683.60 km) |
| Duncan to Pomorie | 6,095.89 mi (9,810.38 km) |
