Flight Reliability
AS 54 · Alaska Airlines
Anchorage → Seattle (ANC–SEA)88% of its flights flew this route. The rest (SJC–LIH, SJC–KOA) are included in these numbers.
- 86%
- Arrive within 15 minutes
- 4 min early
- Average arrival delay
- 2.1%
- Cancelled
- 13 min early
- Median arrival delay
Based on 335 historical flights. Data through May 2026.
What the data says
Mornings have a slight edge.
Departures between 6–9 AM arrived on time 91% of the time, against 86% between 12–3 AM.
Sunday scaries are real for this one.
AS 54 arrived on time 95% of the time on Wednesdays and just 78% on Sundays. That gap is worth planning around.
A bit ahead of the Alaska Airlines network.
AS 54 arrived on time 86% of the time, versus 80% across the Alaska Airlines network.
Ticking up lately.
AS 54 arrived on time 90% of the time over the last three months in the data, compared with 84% in the three months before that.
The breakdown
- Mon86%(42 flights)
- Tue84%(50 flights)
- Wed95%(43 flights)
- Thu94%(49 flights)
- Fri84%(44 flights)
- Sat84%(50 flights)
- Sun78%(50 flights)
- 12–3 AM86%(289 flights)
- 6–9 AM91%(34 flights)
- 9 AM–12 PM—(5 flights)
Jun 79% → May 87% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 79% | 19 |
| July 2025 | 71% | 28 |
| August 2025 | 87% | 31 |
| September 2025 | 97% | 30 |
| October 2025 | 89% | 28 |
| November 2025 | 89% | 28 |
| December 2025 | 80% | 30 |
| January 2026 | 77% | 30 |
| February 2026 | 96% | 28 |
| March 2026 | 92% | 25 |
| April 2026 | 90% | 20 |
| May 2026 | 87% | 31 |
- Departures on time
- 82%
- Diverted
- 0%
- Flights flown
- 328
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 335 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.