Flat tire this morning

the front tire was looking a little low on the road trip once, and then it semed to be fine, but this morning, I noticed the tire was almost flat. I drove it to the gas station down the street to re-fill the air, and went back home to switch cars, since I don't work all that close to where I live, I didn't want to have to use a AAA lifline for a flat. I'll look and see if the tire has lost air again and bring it in to the tire shop for a repair.