Starting at $349.00

Check up to two bags for free when you travel.

Fly free of baggage service charges for an entire year. With a baggage subscription, you and up to eight companions traveling on the same reservation can each check up to two standard bags per flight for free.

Please note: The purchase of a baggage subscription does not waive charges that would ordinarily be assessed for oversized and/or overweight bags and does not cover the cost of checking more than two standard bags.

http://www.united.com/web/en-US/apps.../bagCheck.aspx