United States securities and exchange commission logo May 19, 2022 Dave Davis Chief Financial Officer Sun Country Airlines Holdings, Inc. 2005 Cargo Road Minneapolis, Minnesota 55450 Re: Sun Country Airlines Holdings, Inc. Form 10-K for Fiscal Year Ended December 31, 2021 Form 10-K/A for Fiscal Year Ended December 31, 2021 Form 8-K filed May 5, 2022 File No. 001-40217 Dear Mr. Davis: We have limited our review of your filings to the financial statements and related disclosures and have the following comments. In some of our comments, we may ask you to provide us with information so we may better understand your disclosure. Please respond to these comments within ten business days by providing the requested information or advise us as soon as possible when you will respond. If you do not believe our comments apply to your facts and circumstances, please tell us why in your response. After reviewing your response to these comments, we may have additional comments. Form 10-K/A for Fiscal Year Ended December 31, 2021 Management's Discussion and Analysis of Financial Condition and Results of Operations Critical Accounting Policies and Estimates, page 4 1. The disclosures of your critical accounting policies and estimates appear to be a repetition of certain of your significant accounting policies. Please revise your disclosures to address the material implications of the uncertainties that are associated with the methods, assumptions and estimates underlying your critical accounting estimates. Your expanded disclosure should address the risk related to using different assumptions and analyze their sensitivity to change based on outcomes that are deemed reasonably likely to occur. For additional guidance, refer to Item 303(b)(3) of Regulation S-K and the related Instruction 3 to paragraph (b) of Item 303. Dave Davis FirstName LastNameDave DavisInc. Sun Country Airlines Holdings, Comapany May NameSun Country Airlines Holdings, Inc. 19, 2022 May 19, Page 2 2022 Page 2 FirstName LastName Form 8-K filed May 5, 2022 Exhibit 99.1, page 1 2. We note in the opening remarks that several non-GAAP financial measures were referenced by your Chief Executive Officer, without any discussions of corresponding GAAP financial measures. Revise to provide discussions of financial measures on a GAAP basis with equal or greater prominence to the non-GAAP financial measures. Refer to Item 10(e)(1)(i)(A) of Regulation S-K and Question 102.10 of the Compliance and Disclosure Interpretations on Non-GAAP Financial Measures. Guidance for Second Quarter 2022, page 3 3. We note your guidance for the second quarter of 2022 includes Adjusted Operating Margins of 5%-9%. Please revise to include a quantitative reconciliation of your forward looking non-GAAP guidance measures to the most directly comparable GAAP measures, or include a statement that such reconciliation is not practicable without unreasonable effort. Refer to Item 10(e)(1)(i)(B) of Regulation S-K and Question 102.10 of the Compliance and Disclosure Interpretations on Non-GAAP Financial Measures. Reconciliation of Adjusted EBITDAR to GAAP Net Income, page 12 4. You state on page 10 that Adjusted EBITDAR and Adjusted EBITDAR Margin are commonly used valuation measures. However, you present and discuss these measures on a comparative basis (current period to prior period), as if they are performance measures. Please revise your disclosure to present Adjusted EBITDAR and Adjusted EBITDAR Margin for the most recent valuation period only with no comparison to prior periods. Reconciliation of Adjusted Net Income (Loss) and Adjusted Earnings per Share to GAAP Net Income, page 12 5. Revise to present a reconciliation of Adjusted net income (loss) per share - diluted on a per share basis. Refer to Item 10(e)(1)(i)(B) of Regulation S-K and Question 102.05 of the Compliance and Disclosure Interpretations on Non-GAAP Financial Measures. In closing, we remind you that the company and its management are responsible for the accuracy and adequacy of their disclosures, notwithstanding any review, comments, action or absence of action by the staff. You may contact Wei Lu, Staff Accountant, at (202) 551-3725 or Shannon Buskirk, Staff Accountant, at (202) 551-3717 with any questions. Dave Davis Sun Country Airlines Holdings, Inc. May 19, 2022 Page 3 FirstName LastNameDave Davis Sincerely, Comapany NameSun Country Airlines Holdings, Inc. Division of Corporation Finance May 19, 2022 Page 3 Office of Energy & Transportation FirstName LastName