 On an earnings call, CEO Ed Bastian says low-cost carriers are part of the problem, creating an oversupply of seats on domestic routes. With so much choice available to passengers, Delta's revenue from main cabin ticket sales remained flat, but premium cabin revenue? That jumped 10%. Americans are traveling more than ever this year, with TSA breaking its single-day passenger record on June 23rd, only to break it again two weeks later with 3 million people screened. For NPR News, I'm Melissa Fado in Atlanta.