Long enough that they brought out the snack cart!
(which, they should be doing more often)

BTW, at SWO, our waiting room for our 1 gate is in a temporary trailer (~8 years running now) barely big enough to hold just enough seats for full E175 or CRJ700 (there are plans for an expanded terminal building, but waiting for the federal funds to trickle in). No food or drink options once past security except two sad vending machines and some free (but thin) coffee. The snack cart that they only break out if you are delayed for at least 2 hours is not so discretely hidden under a thick blanket right near the door to the tarmac, which you take to get to the stairs or ramp to the plane. After about an hour, I am so ready to just pull the blanket down and like a magician unveil the goodies to everyone.