Flight Reliability
DL 452 · Delta Air Lines
Seattle → New York (SEA–JFK)
78
Usually Fine
WanderNerd Reliability Score
- 82%
- Arrive within 15 minutes
- 2 min early
- Average arrival delay
- 2.8%
- Cancelled
- 8 min early
- Median arrival delay
Based on 361 historical flights. Data through May 2026.
What the data says
Friday is doing you no favors.
DL 452 arrived on time 92% of the time on Wednesdays and just 67% on Fridays. That gap is worth planning around.
Better than the SEA–JFK route average.
DL 452 arrived on time 82% of the time, versus 74% across the SEA–JFK route.
Slipping a little lately.
DL 452 arrived on time 79% of the time over the last three months in the data, compared with 86% in the three months before that.
The breakdown
- Mon90%(48 flights)
- Tue90%(51 flights)
- Wed92%(49 flights)
- Thu76%(50 flights)
- Fri67%(52 flights)
- Sat88%(51 flights)
- Sun71%(49 flights)
86%
May
Jun 77% → May 86% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 77% | 30 |
| July 2025 | 60% | 30 |
| August 2025 | 84% | 31 |
| September 2025 | 87% | 30 |
| October 2025 | 97% | 31 |
| November 2025 | 86% | 29 |
| December 2025 | 72% | 25 |
| January 2026 | 93% | 28 |
| February 2026 | 92% | 26 |
| March 2026 | 81% | 31 |
| April 2026 | 70% | 30 |
| May 2026 | 86% | 29 |
- Departures on time
- 77%
- Diverted
- 0.3%
- Flights flown
- 350
- 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.