Flight Reliability
DL 5428 · Delta Air Lines
Washington → Raleigh–Durham (DCA–RDU)
21
Bring Snacks
WanderNerd Reliability Score
- 59%
- Arrive within 15 minutes
- 28 min
- Average arrival delay
- 9.2%
- Cancelled
- 8 min
- Median arrival delay
Based on 292 historical flights. Data through May 2026.
What the data says
Wednesdays have been rough.
DL 5428 arrived on time 69% of the time on Tuesdays and just 52% on Wednesdays. That gap is worth planning around.
Lagging the DCA–RDU route.
DL 5428 arrived on time 59% of the time, versus 70% across the DCA–RDU route.
Well behind the Delta Air Lines network.
DL 5428 arrived on time 59% of the time, versus 81% across the Delta Air Lines network.
Keep a backup plan handy.
DL 5428 was cancelled 9.2% of the time. Typical for U.S. flights is around 1–2%.
The breakdown
- Mon57%(47 flights)
- Tue69%(49 flights)
- Wed52%(44 flights)
- Thu55%(42 flights)
- Fri57%(42 flights)
- Sat—(1 flights)
- Sun63%(40 flights)
64%
May
Jun 44% → May 64% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 44% | 18 |
| July 2025 | 50% | 16 |
| August 2025 | 67% | 24 |
| September 2025 | 68% | 25 |
| October 2025 | 40% | 25 |
| November 2025 | 48% | 21 |
| December 2025 | 35% | 17 |
| January 2026 | 60% | 20 |
| February 2026 | 83% | 24 |
| March 2026 | 54% | 26 |
| April 2026 | 83% | 24 |
| May 2026 | 64% | 25 |
- Departures on time
- 60%
- Diverted
- 0%
- Flights flown
- 265
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 292 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.