What are the most popular routes to Dubuque?
| Iowa City - Dubuque | Average priceR 1 272 | Average duration5h 35m | Daily departures3 | |
| Chicago - Dubuque | Average priceR 1 272 | Average duration4h 30m | Daily departures1 | |
| Champaign - Dubuque | Average priceR 1 694 | Average duration7h 10m | Daily departures1 | |
| Des Moines - Dubuque | Average priceR 1 400 | Average duration7h 15m | Daily departures1 | |
| Denver - Dubuque | Average priceR 3 254 | Average duration19h 10m | Daily departures1 | |