Originally Posted by FlyerBeek

IME, tipping is very much expected in FFD. Depending on the airport, sometimes they left you a little clipboard at the end of your meal where it was clearly implied tipping was expected. I always just left a $20 - whether I had a full meal or stopped in for a nightcap/dessert upon arrival. The service always seemed to at least justify that amount, in my opinion. YMMV.

-FlyerBeek