Flight Reliability
AS 104 · Alaska Airlines
Anchorage → Seattle (ANC–SEA)92% of its flights flew this route. The rest (AKN–ANC, ANC–AKN) are included in these numbers.
- 81%
- Arrive within 15 minutes
- 5 min
- Average arrival delay
- 1.8%
- Cancelled
- 5 min early
- Median arrival delay
Based on 279 historical flights. Data through May 2026.
What the data says
Morning flights do better here.
AS 104 departing between 9 AM–12 PM arrived on time 85% of the time, versus 36% between 3–6 PM.
Friday is doing you no favors.
AS 104 arrived on time 86% of the time on Tuesdays. On Fridays: 74%.
A bit behind the ANC–SEA route.
AS 104 arrived on time 81% of the time, versus 85% across the ANC–SEA route.
Ticking up lately.
AS 104 arrived on time 87% of the time over the last three months in the data, compared with 84% in the three months before that.
The breakdown
- Mon81%(41 flights)
- Tue86%(42 flights)
- Wed81%(36 flights)
- Thu85%(40 flights)
- Fri74%(39 flights)
- Sat77%(35 flights)
- Sun85%(41 flights)
- 9 AM–12 PM85%(252 flights)
- 3–6 PM36%(22 flights)
Jun 56% → Apr 94% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 56% | 39 |
| July 2025 | 83% | 29 |
| August 2025 | 83% | 30 |
| September 2025 | 90% | 30 |
| October 2025 | 96% | 27 |
| November 2025 | 86% | 21 |
| January 2026 | 71% | 24 |
| February 2026 | 86% | 28 |
| March 2026 | 82% | 28 |
| April 2026 | 94% | 18 |
- Departures on time
- 84%
- Diverted
- 0%
- Flights flown
- 274
- Months covered
- 10
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.