Flight Reliability
DL 5749 · Delta Air Lines
New York → Washington (LGA–DCA)89% of its flights flew this route. The rest (DCA–LGA, CHS–JFK) are included in these numbers.
- 79%
- Arrive within 15 minutes
- 4 min
- Average arrival delay
- 3.3%
- Cancelled
- 7 min early
- Median arrival delay
Based on 389 historical flights. Data through May 2026.
What the data says
Morning flights do better here.
DL 5749 departing between 9 AM–12 PM arrived on time 80% of the time, versus 63% between 12–3 PM.
Friday is doing you no favors.
DL 5749 arrived on time 89% of the time on Saturdays and just 68% on Fridays. That gap is worth planning around.
Better than the LGA–DCA route average.
DL 5749 arrived on time 79% of the time, versus 69% across the LGA–DCA route.
Keep a backup plan handy.
DL 5749 was cancelled 3.3% of the time. Typical for U.S. flights is around 1–2%.
The breakdown
- Mon84%(51 flights)
- Tue81%(53 flights)
- Wed77%(53 flights)
- Thu71%(56 flights)
- Fri68%(53 flights)
- Sat89%(56 flights)
- Sun78%(54 flights)
- 9 AM–12 PM80%(335 flights)
- 12–3 PM63%(41 flights)
Jun 83% → May 64% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 83% | 30 |
| July 2025 | 90% | 31 |
| August 2025 | 94% | 31 |
| September 2025 | 90% | 30 |
| October 2025 | 71% | 31 |
| November 2025 | 79% | 28 |
| December 2025 | 77% | 30 |
| January 2026 | 79% | 28 |
| February 2026 | 76% | 25 |
| March 2026 | 74% | 27 |
| April 2026 | 77% | 30 |
| May 2026 | 64% | 55 |
- Departures on time
- 85%
- Diverted
- 0%
- Flights flown
- 376
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 389 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.