X0306 4 2023-01-03 0001743907 Sun Country Airlines Holdings, Inc. SNCY 0001935319 Neale Erin Rose 2005 CARGO ROAD MINNEAPOLIS MN 55450 1 1 Secretary Common Stock, par value $0.01 per share 2023-01-03 4 A 0 10829 15.93 A 30037 D Common Stock, par value $0.01 per share 2023-01-04 4 S 0 581 16.1951 D 29456 D Vest in quarterly installments, subject to continued service, beginning on various dates. Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock units. This sale is mandated to satisfy the tax withholding obligations which are funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person. /s/ Erin Rose Neale 2023-01-05