Flight Reliability
AS 345 · Alaska Airlines
Boise → Seattle (BOI–SEA)94% of its flights flew this route. The rest (CMH–SEA, DLG–ANC) are included in these numbers.
- 89%
- Arrive within 15 minutes
- 4 min early
- Average arrival delay
- 1.0%
- Cancelled
- 6 min early
- Median arrival delay
Based on 207 historical flights. Data through May 2026.
What the data says
The 12–3 PM departure wins.
AS 345 departing between 12–3 PM arrived on time 95% of the time, versus 88% between 6–9 AM.
Thursdays have been rough.
AS 345 arrived on time 94% of the time on Tuesdays and just 72% on Thursdays. That gap is worth planning around.
A bit ahead of the BOI–SEA route.
AS 345 arrived on time 89% of the time, versus 82% across the BOI–SEA route.
Better than the Alaska Airlines network average.
AS 345 arrived on time 89% of the time, versus 80% across the Alaska Airlines network.
The breakdown
- Mon87%(31 flights)
- Tue94%(31 flights)
- Wed90%(31 flights)
- Thu72%(25 flights)
- Fri93%(28 flights)
- Sat89%(28 flights)
- Sun94%(31 flights)
- 6–9 AM88%(184 flights)
- 12–3 PM95%(21 flights)
Jun 82% → May 100% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 82% | 11 |
| November 2025 | 86% | 29 |
| December 2025 | 93% | 29 |
| January 2026 | 77% | 30 |
| February 2026 | 93% | 27 |
| March 2026 | 94% | 31 |
| April 2026 | 93% | 29 |
| May 2026 | 100% | 12 |
- Departures on time
- 94%
- Diverted
- 0%
- Flights flown
- 205
- Months covered
- 10
Same route, other flights
Keep nerding
Based on 207 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.