Flight Reliability
DL 3628 · Delta Air Lines
PSC → Seattle (PSC–SEA)86% of its flights flew this route. The rest (DTW–CMH, SAN–LAS) are included in these numbers.
- 88%
- Arrive within 15 minutes
- 3 min early
- Average arrival delay
- 0.5%
- Cancelled
- 12 min early
- Median arrival delay
Based on 216 historical flights. Data through May 2026.
What the data says
The 3–6 PM departure wins.
DL 3628 departing between 3–6 PM arrived on time 93% of the time, versus 55% between 9 PM–12 AM.
Friday is doing you no favors.
DL 3628 arrived on time 96% of the time on Saturdays and just 80% on Fridays. That gap is worth planning around.
A bit ahead of the Delta Air Lines network.
DL 3628 arrived on time 88% of the time, versus 81% across the Delta Air Lines network.
Recent months have been rougher.
DL 3628 arrived on time 78% of the time over the last three months in the data, compared with 94% in the three months before that.
The breakdown
- Mon91%(32 flights)
- Tue88%(33 flights)
- Wed85%(33 flights)
- Thu91%(32 flights)
- Fri80%(30 flights)
- Sat96%(24 flights)
- Sun87%(31 flights)
- 3–6 PM93%(186 flights)
- 6–9 PM—(9 flights)
- 9 PM–12 AM55%(20 flights)
Jun 87% → Jan 57% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 87% | 30 |
| July 2025 | 93% | 30 |
| August 2025 | 89% | 27 |
| September 2025 | 100% | 29 |
| October 2025 | 93% | 30 |
| November 2025 | 93% | 27 |
| December 2025 | 84% | 19 |
| January 2026 | 57% | 23 |
- Departures on time
- 89%
- Diverted
- 0%
- Flights flown
- 215
- Months covered
- 8
Same route, other flights
Keep nerding
Based on 216 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.