For my trip to Pittsburgh this week, Orbitz charged about $350 for the same flights Expedia wanted $500 for. So I booked on Orbitz.
Orbitz has sent me 4 emails asking if I want to add a rental car and hotel to my itinerary. Once was annoying. Twice was wrong. 4 times is spamming me.
Orbitz: no means no. No does not mean maybe tomorrow.