The best pricing can be found in the month of August. Prices to Dubuque from Michigan average $362. You can even find prices in August for less than $362, as users have found deals to Dubuque from as low as $115. The month of September appears to be one of the more expensive times to travel to Dubuque from Michigan. Flying in the targeted month can save you up to 73%.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Michigan to Dubuque as you normally would.