Through December 15, 2009, get 20% off any Old Navy purchase with the code ONSAVE20. This offer is only good online.

If you are planning on purchasing $50 or more, select Free Shipping at check-out through December 15. No coupon code needed. This offer is good throughout all Old Navy brands including Gap, Old Navy, Banana Republic, and Piperlime!

I don’t know if you can combine these two offers.