Flight Reliability
DL 848 · Delta Air Lines
Seattle → Austin (SEA–AUS)88% of its flights flew this route. The rest (DTW–BUF) are included in these numbers.
79
Usually Fine
WanderNerd Reliability Score
- 76%
- Arrive within 15 minutes
- 12 min
- Average arrival delay
- 0.9%
- Cancelled
- 4 min early
- Median arrival delay
Based on 330 historical flights. Data through May 2026.
What the data says
Skip Wednesday if you can.
DL 848 arrived on time 84% of the time on Saturdays. On Wednesdays: 69%.
A bit behind the Delta Air Lines network.
DL 848 arrived on time 76% of the time, versus 81% across the Delta Air Lines network.
Ticking up lately.
DL 848 arrived on time 79% of the time over the last three months in the data, compared with 73% in the three months before that.
The breakdown
- Mon78%(51 flights)
- Tue80%(51 flights)
- Wed69%(49 flights)
- Thu71%(48 flights)
- Fri79%(48 flights)
- Sat84%(31 flights)
- Sun74%(49 flights)
- 3–6 PM76%(290 flights)
- 9 PM–12 AM76%(37 flights)
71%
May
Jun 56% → May 71% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 56% | 25 |
| July 2025 | 78% | 23 |
| August 2025 | 72% | 25 |
| September 2025 | 77% | 26 |
| October 2025 | 89% | 27 |
| November 2025 | 84% | 25 |
| December 2025 | 70% | 27 |
| January 2026 | 76% | 29 |
| February 2026 | 71% | 28 |
| March 2026 | 87% | 31 |
| April 2026 | 80% | 30 |
| May 2026 | 71% | 31 |
- Departures on time
- 76%
- Diverted
- 0%
- Flights flown
- 327
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 330 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.