Flight Reliability
DL 330 · Delta Air Lines
Washington → Atlanta (DCA–ATL)
88
Pretty Reliable
WanderNerd Reliability Score
- 91%
- Arrive within 15 minutes
- 4 min early
- Average arrival delay
- 2.4%
- Cancelled
- 10 min early
- Median arrival delay
Based on 332 historical flights. Data through May 2026.
What the data says
Wednesday has been the better bet.
A small edge: 95% on time on Wednesdays against 89% on Tuesdays.
Better than the DCA–ATL route average.
DL 330 arrived on time 91% of the time, versus 78% across the DCA–ATL route.
Better than the Delta Air Lines network average.
DL 330 arrived on time 91% of the time, versus 81% across the Delta Air Lines network.
The breakdown
- Mon90%(48 flights)
- Tue89%(52 flights)
- Wed95%(20 flights)
- Thu94%(51 flights)
- Fri92%(50 flights)
- Sat90%(51 flights)
- Sun90%(51 flights)
96%
May
Jun 81% → May 96% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 81% | 26 |
| July 2025 | 76% | 25 |
| August 2025 | 93% | 29 |
| September 2025 | 93% | 28 |
| October 2025 | 89% | 26 |
| November 2025 | 88% | 25 |
| December 2025 | 92% | 26 |
| January 2026 | 96% | 25 |
| February 2026 | 100% | 25 |
| March 2026 | 93% | 30 |
| April 2026 | 93% | 30 |
| May 2026 | 96% | 28 |
- Departures on time
- 90%
- Diverted
- 0.3%
- Flights flown
- 323
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 332 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.