Originally Posted by
cesco.g
Is there any luggage storage at IAH?
Knowing that lockers are out, maybe some shop/provider such as at the SFO International Terminal?
I'm presuming you mean for carry-on stuff post security?
On the off chance you have a military ID card you can use the USO, or as EK noted the United club. IIRC a day pass to the club is $50, depending on how long you are staying it might be worth it, presuming you don't already have access. There are some contract and Euro lounges in term D, albeit open less than UA.
If you are going outside security as EK mentioned there is the hotel. Not sure how that works, I've only ever used hotels I am staying at but I do remember some comments on that in the past here in the sub-forum.
If you have bigger bags and a long connection you could try early check-in also. Good luck.