Flight Reliability
AS 2139 · Alaska Airlines
Everett → San Francisco (PAE–SFO)95% of its flights flew this route. The rest (SEA–BOI) are included in these numbers.
- 55%
- Arrive within 15 minutes
- 26 min
- Average arrival delay
- 1.0%
- Cancelled
- 9 min
- Median arrival delay
Based on 206 historical flights. Data through May 2026.
What the data says
Morning flights do better here.
AS 2139 departing between 6–9 AM arrived on time 92% of the time, versus 38% between 3–6 PM.
Thursdays have been rough.
AS 2139 arrived on time 65% of the time on Saturdays and just 48% on Thursdays. That gap is worth planning around.
Lagging the PAE–SFO route.
AS 2139 arrived on time 55% of the time, versus 64% across the PAE–SFO route.
Well behind the Alaska Airlines network.
AS 2139 arrived on time 55% of the time, versus 80% across the Alaska Airlines network.
The breakdown
- Mon50%(32 flights)
- Tue59%(27 flights)
- Wed56%(27 flights)
- Thu48%(31 flights)
- Fri52%(33 flights)
- Sat65%(17 flights)
- Sun63%(35 flights)
- 6–9 AM92%(25 flights)
- 9 AM–12 PM58%(19 flights)
- 12–3 PM55%(104 flights)
- 3–6 PM38%(24 flights)
- 6–9 PM40%(30 flights)
Jun 91% → May 36% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 91% | 11 |
| August 2025 | 42% | 12 |
| September 2025 | 47% | 30 |
| November 2025 | 67% | 24 |
| December 2025 | 75% | 28 |
| February 2026 | 70% | 10 |
| March 2026 | 77% | 22 |
| April 2026 | 26% | 23 |
| May 2026 | 36% | 28 |
- Departures on time
- 57%
- Diverted
- 1.0%
- Flights flown
- 202
- Months covered
- 11
Same route, other flights
Keep nerding
Based on 206 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.