What are the most popular routes to Duncan?
| Daytona Beach - Duncan | Average priceR 3 914 | Average duration2d 19h | Daily departures3 | |
| El Paso - Duncan | Average priceR 625 | Average duration4h 30m | Daily departures1 | |
| Phoenix - Duncan | Average priceR 642 | Average duration4h 20m | Daily departures2 | |
| Oklahoma City - Duncan | Average priceR 4 917 | Average duration1d 2h | Daily departures1 | |
| Dallas - Duncan | Average priceR 3 924 | Average duration21h 50m | Daily departures2 | |
