Flight Reliability
DL 3602 · Delta Air Lines
San Jose → Seattle (SJC–SEA)82% of its flights flew this route. The rest (SAN–LAX, SEA–SJC) are included in these numbers.
87
Pretty Reliable
WanderNerd Reliability Score
- 80%
- Arrive within 15 minutes
- 8 min
- Average arrival delay
- 0.4%
- Cancelled
- 7 min early
- Median arrival delay
Based on 238 historical flights. Data through May 2026.
What the data says
Mondays have been rough.
DL 3602 arrived on time 88% of the time on Wednesdays and just 71% on Mondays. That gap is worth planning around.
A bit behind the SJC–SEA route.
DL 3602 arrived on time 80% of the time, versus 84% across the SJC–SEA route.
Slipping a little lately.
DL 3602 arrived on time 78% of the time over the last three months in the data, compared with 82% in the three months before that.
The breakdown
- Mon71%(34 flights)
- Tue76%(33 flights)
- Wed88%(34 flights)
- Thu88%(34 flights)
- Fri77%(34 flights)
- Sat85%(33 flights)
- Sun77%(35 flights)
- 12–3 PM80%(195 flights)
- 3–6 PM81%(42 flights)
84%
May
Jun 74% → May 84% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 74% | 23 |
| July 2025 | 77% | 31 |
| August 2025 | 77% | 31 |
| September 2025 | 80% | 30 |
| October 2025 | 87% | 31 |
| November 2025 | 87% | 47 |
| December 2025 | 63% | 19 |
| May 2026 | 84% | 25 |
- Departures on time
- 84%
- Diverted
- 0%
- Flights flown
- 237
- Months covered
- 8
Same route, other flights
Keep nerding
Based on 238 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.