The Dubuque Regional Airport is only 15 minutes from the Emmaus campus, and is serviced by AmericanEagle of American Airlines. You can find out more at the Fly DBQ website (first link below), or visit Expedia or the American Airlines website.
Other regional airports may be of interest to you as well. Moline/Quad Cities (MLI), Madison, WI (MSN), Cedar Rapids, IA (CID), and Rockford, IL (RFD) are all within a 1.5 to 2 hour drive. Chicago O'Hare (ORD) is approximately a 3 hour drive from Dubuque.