Delta Air Lines (DAL) Seasonality
Recurring seasonal patterns for DAL — the calendar windows where Delta Air Lines has historically tended to rise or fall, with the win rate (how often it repeated) and average return for each, based on the last 10 years of price history.
DAL seasonality at a glance
Over the last 10 years, DAL's strongest seasonal window has been Nov 2 – Dec 2: it ended higher in 9 of 10 years (90% win rate) with an average return of +10.89% across a 30-day hold. On the weak side, DAL has historically declined between Feb 22 – Mar 24, falling in 8 of 10 years (average -10.49%).
In total, our analysis finds 763 recurring seasonal windows for Delta Air Lines — 509 bullish and 254 bearish. The next high-win-rate window, Aug 20 – Aug 30, opens in 24 days. These figures describe historical behaviour only — not a forecast.
DAL's upcoming & recent seasonal patterns
Holding period:10-day20-day30-dayOrdered by season — windows opening soon first, plus a couple of recently completed high-performers. Holding-period colors help you compare durations at a glance.
| Status | Seasonal window | Hold | Avg return | Win rate | This year |
|---|---|---|---|---|---|
| Completedended 56d ago | May 2 – Jun 1 | 30d | +2.02% | 80% | +18.42% |
| Completedended 57d ago | May 21 – May 31 | 10d | +1.90% | 80% | +9.03% |
| Upcomingin 24d | Aug 20 – Aug 30 | 10d | +3.30% | 80% | — |
| Upcomingin 24d | Aug 20 – Sep 19 | 30d | +4.31% | 80% | — |
| Upcomingin 25d | Aug 21 – Sep 20 | 30d | +4.40% | 80% | — |
| Upcomingin 26d | Aug 22 – Sep 1 | 10d | +2.76% | 80% | — |
| Upcomingin 26d | Aug 22 – Sep 11 | 20d | +3.73% | 80% | — |
Win rate = how often the pattern repeated in the same direction. Average return = the mean move across all analysed years. Past performance does not guarantee future results.
Explore DAL seasonality in full
See the seasonal curve chart, filter by win rate and return, and track upcoming windows — free during beta.
DAL seasonality FAQ
What has historically been the best month to buy DAL stock?
Based on the last 10 years of price data, DAL's strongest seasonal window starts in November: Nov 2 to Dec 2, which ended higher in 9 of 10 years (90% win rate) with an average return of +10.89%. Past seasonal patterns do not guarantee future performance.
What is DAL's strongest seasonal pattern?
DAL's highest-win-rate pattern in our data is the Nov 2 – Dec 2 window (30-day hold): up in 9 of the last 10 years with an average move of +10.89%.
When has DAL historically performed worst?
DAL's weakest recurring window has been Feb 22 to Mar 24, declining in 8 of 10 years with an average return of -10.49%.
How reliable are DAL's seasonal patterns?
Each DAL pattern is scored by its historical win rate — the share of the last 10 years it repeated in the same direction. DAL currently shows 763 recurring windows (509 bullish, 254 bearish). Seasonality describes historical tendencies only; it is not a prediction, and past performance does not guarantee future results.
What is DAL stock seasonality?
Stock seasonality is the tendency of a stock to perform in a similar way during the same period each year. By analysing Delta Air Lines's price history across many years, SeasonalityX identifies recurring calendar windows — exact start and end dates — where DAL has repeatedly risen (bullish) or fallen (bearish). Each pattern is scored by its win rate and average return so you can judge how reliable and how strong it has been.
Seasonality is one input among many — it works best alongside your own research and risk management. Learn more in our guide to seasonal analysis and the tutorials.