Flight Reliability
AS 459 · Alaska Airlines
Boston → Seattle (BOS–SEA)
73
Usually Fine
WanderNerd Reliability Score
- 72%
- Arrive within 15 minutes
- 5 min
- Average arrival delay
- 0.8%
- Cancelled
- 1 min
- Median arrival delay
Based on 364 historical flights. Data through May 2026.
What the data says
Skip Tuesday if you can.
AS 459 arrived on time 76% of the time on Sundays. On Tuesdays: 65%.
Lagging the Alaska Airlines network.
AS 459 arrived on time 72% of the time, versus 80% across the Alaska Airlines network.
Trending in the right direction.
AS 459 arrived on time 69% of the time over the last three months in the data, compared with 59% in the three months before that.
The breakdown
- Mon75%(48 flights)
- Tue65%(51 flights)
- Wed69%(52 flights)
- Thu71%(51 flights)
- Fri75%(51 flights)
- Sat71%(52 flights)
- Sun76%(53 flights)
84%
May
Jun 70% → May 84% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 70% | 30 |
| July 2025 | 55% | 31 |
| August 2025 | 84% | 31 |
| September 2025 | 87% | 30 |
| October 2025 | 90% | 31 |
| November 2025 | 90% | 29 |
| December 2025 | 28% | 29 |
| January 2026 | 76% | 29 |
| February 2026 | 73% | 26 |
| March 2026 | 39% | 31 |
| April 2026 | 83% | 30 |
| May 2026 | 84% | 31 |
- Departures on time
- 86%
- Diverted
- 0.8%
- Flights flown
- 358
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 364 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.