Flight Reliability
AS 564 · Alaska Airlines
Seattle → Kansas City (SEA–MCI)88% of its flights flew this route. The rest (BOI–PDX, SEA–ANC) are included in these numbers.
- 69%
- Arrive within 15 minutes
- 9 min
- Average arrival delay
- 1.2%
- Cancelled
- 1 min early
- Median arrival delay
Based on 253 historical flights. Data through May 2026.
What the data says
The 3–6 PM departure wins.
AS 564 departing between 3–6 PM arrived on time 83% of the time, versus 67% between 6–9 PM.
Thursdays have been rough.
AS 564 arrived on time 81% of the time on Saturdays and just 64% on Thursdays. That gap is worth planning around.
Lagging the SEA–MCI route.
AS 564 arrived on time 69% of the time, versus 77% across the SEA–MCI route.
Lagging the Alaska Airlines network.
AS 564 arrived on time 69% of the time, versus 80% across the Alaska Airlines network.
The breakdown
- Mon64%(42 flights)
- Tue70%(27 flights)
- Wed74%(27 flights)
- Thu64%(39 flights)
- Fri72%(39 flights)
- Sat81%(31 flights)
- Sun65%(43 flights)
- 3–6 PM83%(29 flights)
- 6–9 PM67%(218 flights)
- 9 PM–12 AM—(1 flights)
Jun 63% → May 87% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 63% | 30 |
| July 2025 | 30% | 30 |
| August 2025 | 40% | 25 |
| September 2025 | 65% | 17 |
| October 2025 | 81% | 26 |
| November 2025 | 75% | 20 |
| December 2025 | 77% | 22 |
| March 2026 | 86% | 14 |
| April 2026 | 97% | 29 |
| May 2026 | 87% | 30 |
- Departures on time
- 73%
- Diverted
- 0.8%
- Flights flown
- 248
- Months covered
- 11
Same route, other flights
Keep nerding
Based on 253 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.