Flight Reliability
AS 2555 · Alaska Airlines
BIL → Seattle (BIL–SEA)
93
Nerd Approved
WanderNerd Reliability Score
- 91%
- Arrive within 15 minutes
- 6 min early
- Average arrival delay
- 1.2%
- Cancelled
- 13 min early
- Median arrival delay
Based on 248 historical flights. Data through May 2026.
What the data says
Thursday is the weak spot.
AS 2555 arrived on time 94% of the time on Mondays. On Thursdays: 83%.
A bit ahead of the BIL–SEA route.
AS 2555 arrived on time 91% of the time, versus 86% across the BIL–SEA route.
Better than the Alaska Airlines network average.
AS 2555 arrived on time 91% of the time, versus 80% across the Alaska Airlines network.
Ticking up lately.
AS 2555 arrived on time 90% of the time over the last three months in the data, compared with 84% in the three months before that.
The breakdown
- Mon94%(36 flights)
- Tue91%(35 flights)
- Wed88%(32 flights)
- Thu83%(35 flights)
- Fri91%(35 flights)
- Sat94%(35 flights)
- Sun94%(36 flights)
100%
May
Jun 95% → May 100% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 95% | 19 |
| July 2025 | 100% | 31 |
| August 2025 | 93% | 30 |
| September 2025 | 90% | 30 |
| October 2025 | 97% | 30 |
| November 2025 | 83% | 30 |
| December 2025 | 73% | 15 |
| February 2026 | 88% | 16 |
| March 2026 | 81% | 16 |
| May 2026 | 100% | 12 |
- Departures on time
- 96%
- Diverted
- 0.4%
- Flights flown
- 244
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 248 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.