Ord-dfw
I knew I had crossed the line on Thanksgiving Day 2005, when I needed to get from ORD to DFW and I booked my ticket ORD-ATL-MEX-DFW with DL just so I could get all extra miles, instead of flying nonstop ORD-DFW with AA. It helped me make the decision the fact that AA's ticket was 700.00 and DL was 500.00 o/w.
When the immigration officer in DFW asked me how long I had been out of the country I said just a few hours. Crazy eh? I admit it, I'm hooked on the FF game.