William P. Hobby Airport in Houston was experiencing wait times of nearly three hours Sunday, federal officials said.

Travel at major U.S. airports turned into a nightmare Sunday, with up to three-hour security wait times and a shortage of TSA workers at the start of spring break travel amid the partial government shutdown.

Department of Homeland Security spokeswoman Lauren Bis said travelers are facing missed flights and massive delays. She blamed the chaos on congressional Democrats’ refusal to fund DHS, which led to the partial shutdown.