The lastest rumor is a sizable bump in September on the s-UAL 75/76. Not a big stretch with 6 a/c leaving in the 3rd QTR and 13 in the 4th QTR.

Company Outlook
Fleet Plan
As of July 25, 2013, the Company’s fleet plan was as follows:
Mainline Aircraft in Scheduled Service
B757-200/300 154 (2) (2) (6) (13) 131 (23)

United Continental Holdings, Inc. - Investor Relations - Investor Relations

click on Investor Updates. Then 7/25/2013.