Southwest Airlines canceled 2,600 flights in June; crews say they're exhausted

Southwest vows to do better as cancellations and delays plague its network.

As Americans flock back to air travel, airlines are scrambling to retrain crew and staff airport operations positions -- the job hasn’t been easy with flight cancellations piling up. Southwest canceled 2,687 flights in June according to flight tracking site Flightaware.com. In that same period, United canceled 189, Delta 106, and American canceled 2,423. Southwest has blamed weather and a temporary IT outage in mid-June, but documents obtained by ABC News and conversations with flight crews detail more than just weather problems. “Southwest is facing labor shortages, from the ramp to customer service agents to our flight attendants, pilots, and a lot of those are, they're having trouble filling,” Southwest captain and president of the Southwest Airlines Pilots Association, Casey Murray told ABC News.