United's commitment:

We will offer customers who contact United through reservations or united.com the lowest available fare for which they are eligible, and the most logical routing given the date, destination(s), flight(s) and class of service requested.

What this means for you:

Whether calling reservations or booking your travel on united.com, United will offer the lowest available fare for which you are eligible and we will suggest the most logical route. These guidelines also apply to reservations that you book yourself and then pass on to a travel agent. However, they do not apply to bookings that originate from a travel agency and any travel agency booking fees.

Helpful suggestion:

If you have time to plan and are flexible with your travel dates, booking travel and purchasing your tickets at least 14 days in advance and including a Saturday-night stay may result in a lower fare. Flexibility with travel dates can be especially helpful around holidays.