• In this Oct. 15, 2014 file photo, a Frontier Airlines employee directs passengers at Cleveland Hopkins International Airport in Cleveland. There are few businesses that consumers love to hate more than airlines, but travelers seem to reserve a special level of vitriol for the no-frills, discount airlines. (AP Photo/Tony Dejak, File)

    Some travelers love to hate the new discount airlines

    DALLAS (AP) — When the delay on his 90-minute flight stretched past the four-hour mark, David Rankin started tweeting to Spirit Airlines as he and other passengers grew restless.