Flight Reliability
DL 699 · Delta Air Lines
New York → Seattle (JFK–SEA)
71
Usually Fine
WanderNerd Reliability Score
- 75%
- Arrive within 15 minutes
- 0 min
- Average arrival delay
- 2.2%
- Cancelled
- 7 min early
- Median arrival delay
Based on 365 historical flights. Data through May 2026.
What the data says
Skip Saturday if you can.
DL 699 arrived on time 79% of the time on Thursdays. On Saturdays: 71%.
A bit ahead of the JFK–SEA route.
DL 699 arrived on time 75% of the time, versus 69% across the JFK–SEA route.
A bit behind the Delta Air Lines network.
DL 699 arrived on time 75% of the time, versus 81% across the Delta Air Lines network.
Trending in the right direction.
DL 699 arrived on time 70% of the time over the last three months in the data, compared with 62% in the three months before that.
The breakdown
- Mon76%(50 flights)
- Tue76%(50 flights)
- Wed78%(51 flights)
- Thu79%(52 flights)
- Fri75%(51 flights)
- Sat71%(49 flights)
- Sun73%(51 flights)
68%
May
Jun 77% → May 68% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 77% | 30 |
| July 2025 | 94% | 31 |
| August 2025 | 87% | 31 |
| September 2025 | 90% | 30 |
| October 2025 | 83% | 30 |
| November 2025 | 76% | 29 |
| December 2025 | 43% | 28 |
| January 2026 | 66% | 29 |
| February 2026 | 77% | 26 |
| March 2026 | 52% | 29 |
| April 2026 | 90% | 30 |
| May 2026 | 68% | 31 |
- Departures on time
- 91%
- Diverted
- 0.8%
- Flights flown
- 354
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 365 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.