I took ORD to HNL today (10/10). The flight got delayed by two hours due to short-staffed ATC. We waited an hour in line to take off, and out of concern for not running out of fuel, we returned to the gate. They opened up the door to let people buy food and or go to the bathrooms in the airport while refueling. They finally closed the door and departed, but the damage was done with the delay. Anyone with a tight connection, such as Guam, missed their flight because of this and had to stay overnight in HNL.