[Code of Federal Regulations] [Title 41, Volume 4] [Revised as of July 1, 2001] From the U.S. Government Printing Office via GPO Access [CITE: 41CFR301-10.139] [Page 28] TITLE 41--PUBLIC CONTRACTS AND PROPERTY MANAGEMENT CHAPTER 301--TEMPORARY DUTY (TDY) TRAVEL ALLOWANCES PART 301-10--TRANSPORTATION EXPENSES--Table of Contents Subpart B--Common Carrier Transportation Sec. 301-10.139 May I travel by a foreign air carrier if the cost of my ticket is less than traveling by a U.S. flag air carrier? No. Foreign air carrier service may not be used solely based on the cost of your ticket.