OP, your best bet is to do some of your own research prior to booking anything, and NOT take the word of others --- Most information that you will receive, on here, is accurate, but some "Shoot from the hip" stuff may cost you $ in the end!

A good start is here --- https://www.united.com/web/en-US/con...ticketing.aspx

Also, if you complete your profile it is much easier to assist you --- i.e. - Your airline of choice and your status!