Flight Reliability
DL 1601 · Delta Air Lines
Atlanta → Houston (ATL–IAH)
70
Usually Fine
WanderNerd Reliability Score
- 77%
- Arrive within 15 minutes
- 7 min
- Average arrival delay
- 3.8%
- Cancelled
- 3 min early
- Median arrival delay
Based on 365 historical flights. Data through May 2026.
What the data says
Sunday scaries are real for this one.
DL 1601 arrived on time 86% of the time on Tuesdays and just 71% on Sundays. That gap is worth planning around.
A bit behind the Delta Air Lines network.
DL 1601 arrived on time 77% of the time, versus 81% across the Delta Air Lines network.
Keep a backup plan handy.
DL 1601 was cancelled 3.8% of the time. Typical for U.S. flights is around 1–2%.
Trending in the right direction.
DL 1601 arrived on time 80% of the time over the last three months in the data, compared with 73% in the three months before that.
The breakdown
- Mon71%(51 flights)
- Tue86%(51 flights)
- Wed81%(52 flights)
- Thu74%(50 flights)
- Fri74%(49 flights)
- Sat85%(47 flights)
- Sun71%(51 flights)
77%
May
Jun 81% → May 77% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 81% | 26 |
| July 2025 | 64% | 28 |
| August 2025 | 74% | 31 |
| September 2025 | 93% | 30 |
| October 2025 | 74% | 31 |
| November 2025 | 83% | 29 |
| December 2025 | 59% | 29 |
| January 2026 | 67% | 30 |
| February 2026 | 93% | 28 |
| March 2026 | 79% | 28 |
| April 2026 | 83% | 30 |
| May 2026 | 77% | 31 |
- Departures on time
- 73%
- Diverted
- 0%
- Flights flown
- 351
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 365 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.