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Delta Air Lines Seasonality

Historical month-by-month and year-by-year returns

Based on 20 calendar years of monthly closes, starting 2007.

By Month

MonthAverageMedian% PositiveBestWorst
January+1.4%0.9%47%+30.4%39.8%
February1.7%0.3%47%+26.3%27.1%
March3.3%+1.0%63%+15.7%38.2%
April+0.4%0.7%47%+12.9%17.2%
May+2.2%+3.5%63%+21.3%27.7%
June1.7%3.6%40%+30.9%30.5%
July+1.6%0.8%50%+32.3%14.0%
August0.5%2.4%33%+23.5%12.0%
September+2.8%+2.2%53%+24.1%13.7%
October+6.8%+6.1%74%+47.4%20.3%
November+5.8%+5.8%68%+31.4%19.8%
December+3.6%+2.1%58%+38.9%24.6%

By Calendar Year

YearReturn
2025+14.7%
2024+50.4%
2023+22.4%
202215.9%
20212.8%
202031.2%
2019+17.2%
201810.9%
2017+13.8%
20163.0%
2015+3.0%
2014+79.1%
2013+131.4%
2012+46.7%
201135.8%
2010+10.7%
20090.7%
200823.0%

These are historical patterns, not a forecast — past calendar-month performance does not predict future returns.