Flight Reliability
DL 444 · Delta Air Lines
Atlanta → Seattle (ATL–SEA)
83
Pretty Reliable
WanderNerd Reliability Score
- 84%
- Arrive within 15 minutes
- 2 min early
- Average arrival delay
- 1.7%
- Cancelled
- 9 min early
- Median arrival delay
Based on 363 historical flights. Data through May 2026.
What the data says
Sunday scaries are real for this one.
DL 444 arrived on time 90% of the time on Thursdays. On Sundays: 77%.
A bit ahead of the ATL–SEA route.
DL 444 arrived on time 84% of the time, versus 78% across the ATL–SEA route.
The breakdown
- Mon84%(51 flights)
- Tue86%(51 flights)
- Wed83%(52 flights)
- Thu90%(51 flights)
- Fri88%(49 flights)
- Sat80%(49 flights)
- Sun77%(52 flights)
71%
May
Jun 90% → May 71% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 90% | 30 |
| July 2025 | 87% | 31 |
| August 2025 | 94% | 31 |
| September 2025 | 93% | 30 |
| October 2025 | 77% | 31 |
| November 2025 | 86% | 29 |
| December 2025 | 79% | 28 |
| January 2026 | 72% | 29 |
| February 2026 | 85% | 27 |
| March 2026 | 79% | 28 |
| April 2026 | 93% | 30 |
| May 2026 | 71% | 31 |
- Departures on time
- 90%
- Diverted
- 0.6%
- Flights flown
- 355
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 363 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.