Flight Reliability
DL 560 · Delta Air Lines
Seattle → Atlanta (SEA–ATL)96% of its flights flew this route. The rest (TPA–BOS) are included in these numbers.
86
Pretty Reliable
WanderNerd Reliability Score
- 83%
- Arrive within 15 minutes
- 4 min
- Average arrival delay
- 0.6%
- Cancelled
- 8 min early
- Median arrival delay
Based on 361 historical flights. Data through May 2026.
What the data says
Saturday is the weak spot.
DL 560 arrived on time 88% of the time on Wednesdays. On Saturdays: 78%.
Trending in the right direction.
DL 560 arrived on time 87% of the time over the last three months in the data, compared with 78% in the three months before that.
The breakdown
- Mon84%(50 flights)
- Tue83%(52 flights)
- Wed88%(51 flights)
- Thu86%(51 flights)
- Fri80%(51 flights)
- Sat78%(49 flights)
- Sun81%(53 flights)
84%
May
Jun 73% → May 84% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 73% | 30 |
| July 2025 | 71% | 31 |
| August 2025 | 90% | 31 |
| September 2025 | 93% | 30 |
| October 2025 | 87% | 31 |
| November 2025 | 86% | 28 |
| December 2025 | 69% | 29 |
| January 2026 | 79% | 29 |
| February 2026 | 85% | 27 |
| March 2026 | 80% | 30 |
| April 2026 | 97% | 30 |
| May 2026 | 84% | 31 |
- Departures on time
- 79%
- Diverted
- 0.6%
- Flights flown
- 357
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 361 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.