Don’t make plans with this guy if you don’t want to! This is weirdly pushy behavior, and he really read too much into what you said. I don’t think you led him on. He led himself on. 

Easy (face-saving) out is to say: “I’m sorry. It looks like I can’t hang. My friend really needs my help, and I’m not going to be able to meet you. I wish you the best, good luck during your move!” 

Or more honest move, so he can learn from this: “Hey, I’m sorry. I’m not going to be able to hang out. I felt bad that you missed your flight for me, but honestly I’m not interested in dating. I felt awkward turning you down more firmly before, and I didn’t think I needed to since you were leaving.”