Flight Reliability
AS 189 · Alaska Airlines
Seattle → Anchorage (SEA–ANC)96% of its flights flew this route. The rest (SEA–PHX) are included in these numbers.
78
Usually Fine
WanderNerd Reliability Score
- 75%
- Arrive within 15 minutes
- 7 min
- Average arrival delay
- 1.1%
- Cancelled
- 2 min early
- Median arrival delay
Based on 284 historical flights. Data through May 2026.
What the data says
The 12–3 PM departure wins.
AS 189 departing between 12–3 PM arrived on time 76% of the time, versus 55% between 9 AM–12 PM.
Skip Monday if you can.
AS 189 arrived on time 79% of the time on Sundays. On Mondays: 70%.
A bit behind the Alaska Airlines network.
AS 189 arrived on time 75% of the time, versus 80% across the Alaska Airlines network.
The breakdown
- Mon70%(47 flights)
- Tue78%(37 flights)
- Wed78%(36 flights)
- Thu72%(46 flights)
- Fri75%(32 flights)
- Sat72%(36 flights)
- Sun79%(47 flights)
- 9 AM–12 PM55%(11 flights)
- 12–3 PM76%(270 flights)
83%
Apr
Jun 54% → Apr 83% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 54% | 26 |
| July 2025 | 52% | 21 |
| August 2025 | 79% | 24 |
| September 2025 | 81% | 26 |
| October 2025 | 73% | 30 |
| November 2025 | 92% | 25 |
| December 2025 | 74% | 27 |
| January 2026 | 79% | 28 |
| February 2026 | 75% | 28 |
| March 2026 | 79% | 28 |
| April 2026 | 83% | 18 |
- Departures on time
- 74%
- Diverted
- 0%
- Flights flown
- 281
- Months covered
- 11
Same route, other flights
Keep nerding
Based on 284 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.