Tucson International Airport now has a lovely landscaped pet relief area. It’s curbside, to the east of the terminal building. Just follow the signs to the Prickly Paws Pet Stop.
More and more airports are creating these much-needed “pee-patches,” so go ahead, let Spot have something to drink. Maybe even from one of these cool, collapsible (to less an half an inch!) silicone travel bowls made by the folks at Bamboo.