| Duncan to Ondokuzmayis | 6,428.06 mi (10,344.97 km) |
| Duncan to Ordu | 6,511.52 mi (10,479.27 km) |
| Duncan to Ortahisar | 6,548.38 mi (10,538.59 km) |
| Duncan to Ortakent | 6,364.04 mi (10,241.93 km) |
| Duncan to Ortaklar | 6,331.81 mi (10,190.06 km) |
| Duncan to Ortakoy | 6,514.81 mi (10,484.57 km) |
| Duncan to Ortakoy | 6,469.83 mi (10,412.19 km) |
| Duncan to Osmaneli | 6,293.03 mi (10,127.66 km) |
| Duncan to Osmaniye | 6,679.16 mi (10,749.07 km) |
| Duncan to Ozdere | 6,311.32 mi (10,157.09 km) |
| Duncan to Palu | 6,703.43 mi (10,788.13 km) |
| Duncan to Pamukkale | 6,388.69 mi (10,281.60 km) |
| Duncan to Patnos | 6,757.36 mi (10,874.92 km) |
| Duncan to Pazar | 6,503.90 mi (10,467.02 km) |
| Duncan to Pazarcik | 6,690.16 mi (10,766.78 km) |
