Exhibit 23.1 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the reference to our firm under the caption "Experts" and to the use of our reports dated April 28, 2006, in the Registration Statement (Form F-1) and related Prospectus of Copa Holdings, S.A. for the registration of shares of its Class A common stock. /s/ Ernst & Young Panama City, Republic of Panama June 21, 2006