Flight Reliability
AS 277 · Alaska Airlines
Seattle → Bozeman (SEA–BZN)87% of its flights flew this route. The rest (SMF–PDX, SEA–JNU) are included in these numbers.
84
Pretty Reliable
WanderNerd Reliability Score
- 83%
- Arrive within 15 minutes
- 4 min
- Average arrival delay
- 1.7%
- Cancelled
- 8 min early
- Median arrival delay
Based on 174 historical flights. Data through May 2026.
What the data says
Skip Tuesday if you can.
AS 277 arrived on time 89% of the time on Fridays. On Tuesdays: 79%.
Trending in the right direction.
AS 277 arrived on time 91% of the time over the last three months in the data, compared with 82% in the three months before that.
The breakdown
- Mon83%(29 flights)
- Tue79%(19 flights)
- Wed79%(24 flights)
- Thu85%(27 flights)
- Fri89%(26 flights)
- Sat86%(22 flights)
- Sun79%(24 flights)
92%
May
Nov 74% → May 92% on time
| Month | On-time percentage | Flights |
|---|---|---|
| November 2025 | 74% | 27 |
| December 2025 | 71% | 31 |
| January 2026 | 86% | 28 |
| February 2026 | 89% | 26 |
| March 2026 | 86% | 22 |
| April 2026 | 94% | 18 |
| May 2026 | 92% | 12 |
- Departures on time
- 83%
- Diverted
- 0%
- Flights flown
- 171
- Months covered
- 9
Same route, other flights
Keep nerding
Based on 174 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.