What are the most popular routes to Dubuque?
| Iowa City - Dubuque | Average priceCOP 268 175 | Average duration5h 35m | Daily departures3 | |
| Oskaloosa - Dubuque | Average priceCOP 403 681 | Average duration6h 15m | Daily departures1 | |
| Denver - Dubuque | Average priceCOP 686 309 | Average duration19h 10m | Daily departures1 | |
| Cedar Rapids - Dubuque | Average priceCOP 204 311 | Average duration6h 15m | Daily departures1 | |
| Naperville - Dubuque | Average priceCOP 341 735 | Average duration3h 40m | Daily departures1 | |