If you can't combine, how does the below work? The only thing I can imagine is booking each hotel night individually and using a different awards account for each night. And you could get plane tickets seperately, but even then how would you amass 50-63K points in a single account? (Though, I'm guessing the AA was from the BA 100K offer?)
2 1st class tickets OMA to LHR on AA - 125k AA miles
5 nights at Waldorf Hilton in London - 200k Hilton Points
5 nights at Holiday Inn Notre Dame in Paris - 125k PC Points
2 business class tickets CDG to OMA on Lufthansa - 100k United miles
You can book for other people with most programs, just not combine their points with yours. I used my AA points and my United points to book us each a ticket. Mrs Dave has points/cards in her name but we didn't use any of hers this trip. I actually had about 450k AA miles before I booked this trip (not from the BA 100k offer). They are easy to obtain if you churn AA cards. The hotels are booked in two chunks of 5. I actually got a discounted point rate by booking 5 consecutive nights at the Waldorf Hilton (would have been 250k normally). It's pretty easy to do once you start. I got the points above from:
125k AA from Citi AA cards. Have had 8 to 10 since this thread was started.
5 nights Waldorf Hilton. Hilton Surpass and nomal Hilton Amex cards as well as two Hawaiin cards I transferred to Hilton. Still have over 200k Hilton points. This is also my work travel hotel chain of choice.
5 nights at Holiday Inn Notre Dame. Had about 50k PC points just from staying at PC properties (usually the one in MHK) and then got the 80k Chase PC card.
100k United miles. Have flown United quite a bit over the last few years and then got the 50k Chase United card.