Spirit Airlines (SAVE1) S-3ASR Automatic shelf registration

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 Spirit Airlines, Inc. for the registration of voting common stock, non-voting common stock, preferred stock, debt securities, warrants, rights, purchase contracts and units, and pass through certificates and to the incorporation by reference therein of our reports dated February 9, 2024, with respect to the consolidated financial statements of Spirit Airlines, Inc., and the effectiveness of internal control over financial reporting of Spirit Airlines, Inc., included in its Annual Report (Form 10-K) for the year ended December 31, 2023, filed with the Securities and Exchange Commission.

/s/ Ernst & Young LLP

Miami, Florida

February 9, 2024