IAH 90 minutes from hotel to plane.

Hi all. I'll be in Houston for the first time this week for a conference and will have just about 90 minutes to make it from my hotel to the plane at IAH. I also have to drop off my rental (national). The hotel is about 15 minutes from the rental drop off.

Im planning on scheduling an uber from the rental drop off to terminal A. Thankfully, I only have a carry-on. Im also very familiar with busy airports (coming from Chicago). My question is, do you think this is doable or am I cooked?