Anyone know if it's possible to change the FF number in an itinerary after it has started? I've got a trip straddling new year and would like the outbound (2007) to go into one program and then switch to another FF account for the return (early 2008). I can wait until the first segments post before calling but I'm wondering if this is a known strategy and generally fails. I'll have to phone LH to do it. Or can it be done online (booked through expedia)? Thanks for any info.