I love these places for Brunch. Day by Day in Rittenhouse Square and Sabrina’s on the University City side. There is also Honey’s Sit and Eat which I have heard great things about, but have never been.
You can take the train to University City, or 30th street station from the airport and then take a cab or Uber from there, or you can just Uber to and from the Airport. I think (not sure) that Uber is about 30 dollars FROM the airport, but only about 10-15 TO the airport. The train is about 5.50 each way, but then you have extra transportation fees once you get there.
If you have time to kill, Day by Day is in a nice area to walk around with the park and shops. From Sabrina’s you can walk around Penn’s campus which is also nice to do.