When flying from Dubuque to Chicago, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
For a flight from Dubuque to Chicago, you will be flying from Dubuque. Dubuque (DBQ) is just 7.1 mi from the center of the city. Dubuque is the only Dubuque airport and it handles 0 outbound flights to Chicago per day. 0 airlines have flights to Chicago from Dubuque on a regular basis.
DBQ stands for Dubuque Airport, while ORD stands for Chicago O'Hare Intl Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry. Chicago Midway Airport (MDW), Chicago Greater Rockford Airport (RFD) are other airports near this flight route and their unique identifiers/IATA codes.