Flight Reliability
DL 1284 · Delta Air Lines
Atlanta → Houston (ATL–IAH)
67
Usually Fine
WanderNerd Reliability Score
- 71%
- Arrive within 15 minutes
- 17 min
- Average arrival delay
- 2.0%
- Cancelled
- 1 min early
- Median arrival delay
Based on 356 historical flights. Data through May 2026.
What the data says
Sunday scaries are real for this one.
DL 1284 arrived on time 81% of the time on Wednesdays and just 62% on Sundays. That gap is worth planning around.
A bit behind the ATL–IAH route.
DL 1284 arrived on time 71% of the time, versus 76% across the ATL–IAH route.
Lagging the Delta Air Lines network.
DL 1284 arrived on time 71% of the time, versus 81% across the Delta Air Lines network.
Ticking up lately.
DL 1284 arrived on time 77% of the time over the last three months in the data, compared with 74% in the three months before that.
The breakdown
- Mon67%(51 flights)
- Tue69%(52 flights)
- Wed81%(52 flights)
- Thu75%(51 flights)
- Fri76%(50 flights)
- Sat65%(43 flights)
- Sun62%(50 flights)
72%
May
Jun 33% → May 72% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 33% | 30 |
| July 2025 | 53% | 30 |
| August 2025 | 74% | 31 |
| September 2025 | 80% | 30 |
| October 2025 | 84% | 31 |
| November 2025 | 76% | 29 |
| December 2025 | 67% | 30 |
| January 2026 | 78% | 27 |
| February 2026 | 76% | 25 |
| March 2026 | 74% | 27 |
| April 2026 | 83% | 30 |
| May 2026 | 72% | 29 |
- Departures on time
- 68%
- Diverted
- 0%
- Flights flown
- 349
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 356 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.