Exhibit 99.1 Sun Country Airlines Reports Fourth Quarter and Full Year 2025 Results Fourteenth consecutive quarter and fifth consecutive year of profitability Q4 2025 total revenue of $281.0 million, highest fourth quarter on record Q4 2025 GAAP diluted EPS of$0.15 and adjusted diluted EPS of $0.17 FY 2025 total revenue of$1.13 billion, highest full year on record FY 2025 GAAP diluted EPS of $0.96 and adjusted diluted EPS of$1.10 (1) (2) (1) (2) MINNEAPOLIS. February 5, 2026. Sun Country Airlines Holding ...