Flight Reliability
DL 1566 · Delta Air Lines
Phoenix → Detroit (PHX–DTW)85% of its flights flew this route. The rest (DTW–FLL, ONT–SEA) are included in these numbers.
- 79%
- Arrive within 15 minutes
- 8 min
- Average arrival delay
- 1.8%
- Cancelled
- 5 min early
- Median arrival delay
Based on 217 historical flights. Data through May 2026.
What the data says
The late departure is the smart one here.
DL 1566 departing between 9 PM–12 AM arrived on time 81% of the time, versus 53% between 6–9 PM.
Friday is doing you no favors.
DL 1566 arrived on time 87% of the time on Thursdays and just 69% on Fridays. That gap is worth planning around.
Trending in the right direction.
DL 1566 arrived on time 85% of the time over the last three months in the data, compared with 67% in the three months before that.
The breakdown
- Mon82%(28 flights)
- Tue82%(33 flights)
- Wed79%(33 flights)
- Thu87%(31 flights)
- Fri69%(32 flights)
- Sat79%(24 flights)
- Sun77%(31 flights)
- 9 AM–12 PM—(8 flights)
- 6–9 PM53%(17 flights)
- 9 PM–12 AM81%(187 flights)
Jun 82% → Apr 80% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 82% | 22 |
| July 2025 | 67% | 21 |
| December 2025 | 54% | 28 |
| January 2026 | 81% | 31 |
| February 2026 | 89% | 28 |
| March 2026 | 87% | 30 |
| April 2026 | 80% | 30 |
- Departures on time
- 76%
- Diverted
- 0.5%
- Flights flown
- 212
- Months covered
- 11
Same route, other flights
Keep nerding
Based on 217 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.