Since I always enter my flights into this app and flights always appear, even months in advance, I was surprised when this flight did not show up, and a totally different flight came up. My flight, which appears on the Delta website, is DL#4936. Whatever happens, I know Delta will come up with an alternative flight, if they change flights around, and I realize I can change my flight if what they offer does not work for me. I do have to connect to another flight, so the time of this first leg is important.