Originally Posted by
mherdeg
Well, just thinking out loud, you could book the UA-only version of your itinerary, assume it tickets within 30 min, then apply the upgrade, then call and make your change to include your actual European destination/segments and ask for the change fee to be waived because it's within 24 hours of purchase. If that doesn't work, you could cancel and refund the itinerary (for free because it's within 24 hours of purchase.)
Interesting idea. I've read a post where some agent chastised a IK for trying to make a change to a booking within 24 hours and asking that the change fee be waived. I've decided to take my chances and try the booking with code share segments, which are now awaiting word back from LX.
I did look into just booking an open jaw on United, and then saw that booking the LX tickets separately would cost about $250 more, plus no protection for mis-connection.