Flight Reliability
AS 602 · Alaska Airlines
Seattle → Denver (SEA–DEN)100% of its flights flew this route. The rest (LAX–SFO) are included in these numbers.
- 69%
- Arrive within 15 minutes
- 13 min
- Average arrival delay
- 0.7%
- Cancelled
- 0 min
- Median arrival delay
Based on 279 historical flights. Data through May 2026.
What the data says
The late departure is the smart one here.
AS 602 departing between 6–9 PM arrived on time 82% of the time, versus 60% between 3–6 PM.
Sunday scaries are real for this one.
AS 602 arrived on time 82% of the time on Saturdays and just 61% on Sundays. That gap is worth planning around.
Lagging the SEA–DEN route.
AS 602 arrived on time 69% of the time, versus 78% across the SEA–DEN route.
Lagging the Alaska Airlines network.
AS 602 arrived on time 69% of the time, versus 80% across the Alaska Airlines network.
The breakdown
- Mon71%(42 flights)
- Tue74%(38 flights)
- Wed80%(40 flights)
- Thu62%(42 flights)
- Fri62%(42 flights)
- Sat82%(27 flights)
- Sun61%(43 flights)
- 12–3 PM75%(72 flights)
- 3–6 PM60%(136 flights)
- 6–9 PM82%(66 flights)
Jun 33% → May 87% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 33% | 24 |
| July 2025 | 24% | 25 |
| August 2025 | 46% | 26 |
| September 2025 | 77% | 26 |
| November 2025 | 83% | 29 |
| December 2025 | 87% | 30 |
| January 2026 | 77% | 31 |
| February 2026 | 87% | 23 |
| March 2026 | 64% | 11 |
| May 2026 | 87% | 31 |
- Departures on time
- 67%
- Diverted
- 1.1%
- Flights flown
- 274
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 279 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.