Flight Reliability
AS 536 · Alaska Airlines
Seattle → Boston (SEA–BOS)98% of its flights flew this route. The rest (PDX–AUS, SFO–AUS) are included in these numbers.
- 72%
- Arrive within 15 minutes
- 5 min
- Average arrival delay
- 0.8%
- Cancelled
- 1 min early
- Median arrival delay
Based on 251 historical flights. Data through May 2026.
What the data says
Wednesdays have been rough.
AS 536 arrived on time 84% of the time on Saturdays and just 58% on Wednesdays. That gap is worth planning around.
A bit behind the SEA–BOS route.
AS 536 arrived on time 72% of the time, versus 75% across the SEA–BOS route.
Lagging the Alaska Airlines network.
AS 536 arrived on time 72% of the time, versus 80% across the Alaska Airlines network.
Recent months have been rougher.
AS 536 arrived on time 68% of the time over the last three months in the data, compared with 85% in the three months before that.
The breakdown
- Mon83%(36 flights)
- Tue83%(30 flights)
- Wed58%(38 flights)
- Thu63%(38 flights)
- Fri69%(36 flights)
- Sat84%(31 flights)
- Sun70%(40 flights)
- 9 AM–12 PM—(3 flights)
- 6–9 PM—(1 flights)
- 9 PM–12 AM72%(245 flights)
Jun 53% → May 73% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 53% | 30 |
| July 2025 | 68% | 31 |
| August 2025 | 70% | 30 |
| September 2025 | 83% | 30 |
| October 2025 | 86% | 28 |
| November 2025 | 93% | 14 |
| December 2025 | 77% | 13 |
| February 2026 | 60% | 15 |
| March 2026 | 71% | 17 |
| May 2026 | 73% | 30 |
- Departures on time
- 79%
- Diverted
- 0%
- Flights flown
- 249
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 251 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.