Any suggestions on how to combine miles from Alaska/United/Delta into one spot. Most of the mileage is on Alaska, the other two have about 20K each in them. I kind of think that once I get enough points for OW travel, I may need to leave on one airline and then return on the other. Ideas?

I enjoy traveling the world as much as I can, experiencing the different cultures, and foods. I have been to Kenya, Zimbabwe, Namibia, South Africa and Togo - and would return to any of them in a heartbeat if my finances would allow it. I would also love to return to Argentina were the food is out of this world.