The ultra-low-cost air carrier Spirit Airlines shut down operations after 34 years in business and canceled all flights at 3AM ET on Saturday morning. Its website now redirects to spiritrestructuring.com , instructing fliers not to go to airports, with air traffic control records capturing controllers and pilots signing off to each other as its last flights came in for landings after the shutdown was announced. A statement on its website said that for people who purchased tickets directly, “Refunds for tickets purchased by credit card and debit card have been issued, and will be processed by Spirit’s credit card processor.” A lawyer for Spirit said the shutdown could impact 17,000 jobs, reports the Associated Press, as the Air Line Pilots Association said its more than 2,000 pilots, as well as flight attendants, mechanics, dispatchers, and ground crews, “deserved better than this outcome. For stranded travelers, other airlines have announced various rescue fare options.…