Welcome to FT!

You can find an overview of UA's award redemption policies at: http://www.united.com/page/article/0,6722,1140,00.html

When you log into your mileage plus account, your account summary will show you how many redeemable miles you have.

There is also a very helpful FAQ at the top of this thread with good information: http://www.flyertalk.com/forum/unite...lines-faq.html