Originally Posted by
sdsearch
welcome to FlyerTalk, slavakala.
Consolidating all to one program is not practical or possible. Plus it's very good to have miles/points in multiple programs, as for a given trip one airline may have availability and another may not, and one hotel program may have a good redemption rate while another may not (or may not even have properties there).
At most, if you want to top off to an award level, then it might make sense to transfer a small portion of your Marriott points to one or other airline. But it's not going to be a good value for other than "topping off". Marriott points will be much more valuable for hotel stays if mostly left where they are.
The first half of this is great advice. The second half, not so much.
Consider the Marriott Hotel + Air packages:
http://www.marriott.com/rewards/usepoints/morepack.mi
Redeeming a 7 night stay + 132,000 United Miles (actually 152,000 under a current promotion, though make sure to register) costs 120,000 more points than booking just a 7 night stay. So by spending 120,000 additional Marriott points beyond those required for the hotel alone, you get 152,000 United Miles. That's a fantastic value if you book premium cabin travel at saver mileage levels.
Even if you argue that to maximize value of Marriott points on hotel stays, you should redeem in 5 night blocks to get the 5th night free, the math still works out for the Hotel + Air packages often being a better value than hotel alone.