Flight Reliability
DL 5729 · Delta Air Lines
Washington → LEX (DCA–LEX)96% of its flights flew this route. The rest (LGA–GSO) are included in these numbers.
- 76%
- Arrive within 15 minutes
- 12 min
- Average arrival delay
- 3.8%
- Cancelled
- 9 min early
- Median arrival delay
Based on 316 historical flights. Data through May 2026.
What the data says
The 3–6 PM departure wins.
DL 5729 departing between 3–6 PM arrived on time 83% of the time, versus 75% between 9 PM–12 AM.
Friday is doing you no favors.
DL 5729 arrived on time 84% of the time on Sundays and just 66% on Fridays. That gap is worth planning around.
A bit behind the Delta Air Lines network.
DL 5729 arrived on time 76% of the time, versus 81% across the Delta Air Lines network.
Keep a backup plan handy.
DL 5729 was cancelled 3.8% of the time. Typical for U.S. flights is around 1–2%.
The breakdown
- Mon83%(47 flights)
- Tue78%(50 flights)
- Wed68%(47 flights)
- Thu72%(47 flights)
- Fri66%(47 flights)
- Sat79%(14 flights)
- Sun84%(51 flights)
- 3–6 PM83%(12 flights)
- 6–9 PM—(1 flights)
- 9 PM–12 AM75%(290 flights)
Jun 68% → May 88% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 68% | 28 |
| July 2025 | 62% | 26 |
| August 2025 | 77% | 31 |
| September 2025 | 77% | 26 |
| October 2025 | 82% | 27 |
| November 2025 | 70% | 23 |
| December 2025 | 86% | 21 |
| January 2026 | 86% | 22 |
| February 2026 | 75% | 24 |
| March 2026 | 62% | 26 |
| April 2026 | 79% | 24 |
| May 2026 | 88% | 25 |
- Departures on time
- 74%
- Diverted
- 0.3%
- Flights flown
- 303
- Months covered
- 12
Keep nerding
Based on 316 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.