SATO Office phone number change Published April 22, 2011 By Passenger Travel Office 28th Logistics Readiness Squadron ELLSWORTH AIR FORCE BASE, S.D. -- Effective April 26, the SATO office will be changing its telephone and fax system to an 800 extension. There will also be a new email for questions, comments, or concerns. Toll Free Reservation Number: (855) 794-4316 Fax Number: (866) 230-0487 Office Email: ellsworthafb@cwtsatotravel.com The office hours of 7:30 a.m. to 4:30 p.m. Monday through Friday, and passenger calling procedures will still remain the same. The number below is only for passengers who may be in transit during their travels, or who may be having trouble with their flights while they are at the airport terminals. Emergency After Hours Service: 24 hour Emergency Services After-hours: (855) 794-4316 International Travelers , call collect: (210) 877-3255