Alaska Airlines SEA to MSO on-time performance
Alaska Airlines nonstop flights from Seattle to Missoula · Aug 2025 – Jul 2026
On-time arrivals
84%
arrived < 15 min late
Cancelled
0.9%
5 flights
Avg arrival delay
9 min
47 min when late
Rank on route
#1 of 2
route average 84% on time
Key facts
- Alaska Airlines flights on SEA to MSO arrived on time 84% of the time in Aug 2025 – Jul 2026.
- 0.9% were cancelled, and 4% arrived an hour or more late.
- That ranks #1 of 2 airlines on this route, which averaged 84% on time overall.
- The largest source of delay minutes was late-arriving aircraft (42%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft42%
- Airline (crew, maintenance, cleaning, fueling)36%
- Air traffic control & airport congestion13%
- Extreme weather9%
- Security0%
Other airlines on SEA to MSO
- SkyWest Airlines83% on time · 8 min avg delay
Full SEA to MSO comparison →
Alaska Airlines on-time record across all routes →
539 Alaska Airlines flights tracked on this route; 5 cancelled, 1 diverted.
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. How we calculate this.