Cars passing by honked their horns Tuesday morning and some drivers shouted out in encouragement as two major airline flight attendant groups held informational pickets at Harry Reid International Airport.

Union members from Southwest Airlines and United Airlines picketed outside of the airport to draw attention to their concerns. Airlines have been dogged by understaffing causing hundreds of flight delays that have not only frustrated flight crews but have also aggravated travelers.

Members of Transportation Workers Union Local 556, the union of more than 18,000 Southwest flight attendants, were picketing to demand a new contract offering better pay, safety on the job and improved quality of life.