Flight Reliability
DL 2640 · Delta Air Lines
Los Angeles → Seattle (LAX–SEA)
88
Pretty Reliable
WanderNerd Reliability Score
- 84%
- Arrive within 15 minutes
- 2 min early
- Average arrival delay
- 0.8%
- Cancelled
- 14 min early
- Median arrival delay
Based on 361 historical flights. Data through May 2026.
What the data says
Sunday scaries are real for this one.
DL 2640 arrived on time 90% of the time on Thursdays. On Sundays: 77%.
Slipping a little lately.
DL 2640 arrived on time 75% of the time over the last three months in the data, compared with 80% in the three months before that.
The breakdown
- Mon87%(52 flights)
- Tue89%(52 flights)
- Wed80%(49 flights)
- Thu90%(50 flights)
- Fri78%(51 flights)
- Sat85%(52 flights)
- Sun77%(52 flights)
- 3–6 PM84%(353 flights)
- 6–9 PM—(5 flights)
74%
May
Jun 93% → May 74% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 93% | 30 |
| July 2025 | 87% | 31 |
| August 2025 | 84% | 31 |
| September 2025 | 90% | 30 |
| October 2025 | 90% | 31 |
| November 2025 | 93% | 29 |
| December 2025 | 82% | 28 |
| January 2026 | 80% | 30 |
| February 2026 | 78% | 27 |
| March 2026 | 70% | 30 |
| April 2026 | 80% | 30 |
| May 2026 | 74% | 31 |
- Departures on time
- 78%
- Diverted
- 0%
- Flights flown
- 358
- 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.