Flight Reliability
DL 727 · Delta Air Lines
Atlanta → Washington (ATL–DCA)
32
Bring Snacks
WanderNerd Reliability Score
- 53%
- Arrive within 15 minutes
- 31 min
- Average arrival delay
- 2.0%
- Cancelled
- 13 min
- Median arrival delay
Based on 346 historical flights. Data through May 2026.
What the data says
Thursdays have been rough.
DL 727 arrived on time 75% of the time on Saturdays and just 46% on Thursdays. That gap is worth planning around.
Well behind the ATL–DCA route.
DL 727 arrived on time 53% of the time, versus 70% across the ATL–DCA route.
Well behind the Delta Air Lines network.
DL 727 arrived on time 53% of the time, versus 81% across the Delta Air Lines network.
Trending in the right direction.
DL 727 arrived on time 59% of the time over the last three months in the data, compared with 46% in the three months before that.
The breakdown
- Mon52%(50 flights)
- Tue49%(51 flights)
- Wed55%(49 flights)
- Thu46%(48 flights)
- Fri51%(49 flights)
- Sat75%(36 flights)
- Sun47%(47 flights)
53%
May
Jun 33% → May 53% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 33% | 24 |
| July 2025 | 23% | 26 |
| August 2025 | 73% | 22 |
| September 2025 | 69% | 29 |
| October 2025 | 65% | 31 |
| November 2025 | 50% | 28 |
| December 2025 | 37% | 27 |
| January 2026 | 56% | 27 |
| February 2026 | 44% | 27 |
| March 2026 | 48% | 29 |
| April 2026 | 77% | 30 |
| May 2026 | 53% | 30 |
- Departures on time
- 66%
- Diverted
- 2.6%
- Flights flown
- 330
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 346 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.