Flight Reliability
DL 836 · Delta Air Lines
Atlanta → Phoenix (ATL–PHX)
69
Usually Fine
WanderNerd Reliability Score
- 71%
- Arrive within 15 minutes
- 17 min
- Average arrival delay
- 1.4%
- Cancelled
- 0 min
- Median arrival delay
Based on 365 historical flights. Data through May 2026.
What the data says
Sunday scaries are real for this one.
DL 836 arrived on time 83% of the time on Wednesdays and just 62% on Sundays. That gap is worth planning around.
A bit behind the ATL–PHX route.
DL 836 arrived on time 71% of the time, versus 75% across the ATL–PHX route.
Lagging the Delta Air Lines network.
DL 836 arrived on time 71% of the time, versus 81% across the Delta Air Lines network.
Trending in the right direction.
DL 836 arrived on time 79% of the time over the last three months in the data, compared with 68% in the three months before that.
The breakdown
- Mon78%(51 flights)
- Tue67%(52 flights)
- Wed83%(52 flights)
- Thu67%(52 flights)
- Fri67%(51 flights)
- Sat73%(51 flights)
- Sun62%(50 flights)
65%
May
Jun 45% → May 65% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 45% | 29 |
| July 2025 | 48% | 31 |
| August 2025 | 67% | 30 |
| September 2025 | 90% | 30 |
| October 2025 | 80% | 30 |
| November 2025 | 79% | 29 |
| December 2025 | 67% | 30 |
| January 2026 | 73% | 30 |
| February 2026 | 64% | 28 |
| March 2026 | 87% | 31 |
| April 2026 | 87% | 30 |
| May 2026 | 65% | 31 |
- Departures on time
- 75%
- Diverted
- 0.3%
- Flights flown
- 359
- 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.