Saw this on Facebook and tried it out. Sure enough, there they are. Pretty nifty gif animation stickers. A bunch of them. Here is a screenshot. I did not see this come posted but may have missed:

Probably at least 50 different ones in total


“Coming home. See you soon. Landed.

Sure, you could take the time to type it out, but where’s the fun in that? Update your Fly Delta app now to get Fly Delta stickers for iMessage.”