Illustration: Shoshana Gordon/Axios Airlines, aviation officials and the TSA are all telegraphing an alarming information for vacationers: Flying is shaping up to be an absolute nightmare this summer time. Why it matters: It is really abnormal for all these powers that be to trace so loudly that we’re in for a tough number of months — and travelers would be smart to heed their warnings. Tuesday’s Southwest Airways snafu, where by facts relationship concerns briefly halted departures, is a reminder of how immediately a relatively smaller trouble can lead to huge problems. Driving the news: The TSA expects a possible document selection of tourists to go as a result of…