I have not seen air show on the 737's or MD-88's on DL. In fact, a very limited airshow is on the 757 transcons now in which there is no maps but just speed, time to destination and head wind. In fact, it hasn't worked on my last couple of flights correctly. So, I think your chances are slim. Plus I thought the MD-88's had no IFE system of anykind... not even drop down tv monitors like the 737's have.