Exhibit 21 CNF TRANSPORTATION INC. SIGNIFICANT SUBSIDIARIES OF THE COMPANY December 31, 1999 The Company and its significant subsidiaries were: State or Percent of Province or Stock Owned Country of Parent and Significant Subsidiaries by Company Incorporation CNF Transportation Inc. Delaware Significant Subsidiaries of CNF Transportation Inc. Con-Way Transportation Services, Inc. 100 Delaware Emery Air Freight Corporation 100 Delaware Emery Worldwide Airlines, Inc. 100 Nevada Menlo Logistics, Inc. 100 California Road Systems, Inc. 100 California