Flight Reliability
DL 1264 · Delta Air Lines
Chicago → Atlanta (ORD–ATL)
91
Nerd Approved
WanderNerd Reliability Score
- 91%
- Arrive within 15 minutes
- 6 min early
- Average arrival delay
- 1.6%
- Cancelled
- 13 min early
- Median arrival delay
Based on 365 historical flights. Data through May 2026.
What the data says
Wednesday comes out ahead.
A small edge: 94% on time on Wednesdays against 88% on Mondays.
Well ahead of the ORD–ATL route.
DL 1264 arrived on time 91% of the time, versus 75% across the ORD–ATL route.
Better than the Delta Air Lines network average.
DL 1264 arrived on time 91% of the time, versus 81% across the Delta Air Lines network.
The breakdown
- Mon88%(49 flights)
- Tue94%(50 flights)
- Wed94%(52 flights)
- Thu94%(52 flights)
- Fri90%(52 flights)
- Sat89%(52 flights)
- Sun88%(51 flights)
90%
May
Jun 93% → May 90% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 93% | 30 |
| July 2025 | 97% | 31 |
| August 2025 | 84% | 31 |
| September 2025 | 97% | 30 |
| October 2025 | 94% | 31 |
| November 2025 | 85% | 27 |
| December 2025 | 80% | 30 |
| January 2026 | 94% | 31 |
| February 2026 | 100% | 28 |
| March 2026 | 87% | 30 |
| April 2026 | 93% | 28 |
| May 2026 | 90% | 31 |
- Departures on time
- 92%
- Diverted
- 0.3%
- Flights flown
- 358
- 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.