EXHIBIT 23.1 Consent of Independent Registered Public Accounting Firm We consent to the reference to our firm under the caption "Experts" in the Registration Statement (Form S-3) and related Prospectus of Fluor Corporation for the registration of $500,000,000 of common stock and/or debt securities and to the incorporation by reference therein of our report dated January 28, 2004 (except for Financing Arrangements and Lease Obligations notes, as to which the date is February 27, 2004), with respect to the consolidated financial statements of Fluor Corporation included in its Annual Report (Form 10-K) for the year ended December 31, 2003, filed with the Securities and Exchange Commission. /s/ Ernst & Young LLP Ernst & Young LLP Orange County, California December 23, 2004