What are the most popular routes to Dubuque?
| Iowa City - Dubuque | Average priceR 1 204 | Average duration5h 35m | Daily departures3 | |
| Naperville - Dubuque | Average priceR 1 534 | Average duration3h 40m | Daily departures1 | |
| Denver - Dubuque | Average priceR 3 080 | Average duration19h 10m | Daily departures1 | |
| Champaign - Dubuque | Average priceR 1 604 | Average duration7h 10m | Daily departures1 | |
| Omaha - Dubuque | Average priceR 2 872 | Average duration18h 30m | Daily departures1 | |