I've done this at McDonald's several times, and it is so good!  I definitely feel satisfied. 

 McChicken, no mayo

Side Salad with low-fat italian dressing

Fruit and Yogurt Parfait

Large diet soda

Total cals: 550  Total Fat: 15.5

 Rather than trying to avoid fast food altogether and failing, I've managed to come up with quite a few different fast food meals that fall within my limits.

 Here's one of my favorites:

Chik-fil-a

Chargrilled Chicken Sandwich with honey mustard sauce (1oz packet)

  A side salad w/ fat free honey mustard dressing (2tbsp)

Total cal: 435

Fat: 6.5g

I just get a large cup or water with my meal, but could get a diet drink if you absolutely have to. 

Check out their site - they have a Meal Calculator so you can calculate your intake before you even order!  It's really helpful  --  http://www.chick-fil-a.com/#calculator

Another good option is El Pollo Loco.

The pollo bowl has 4g of fat and is VERY filling.