Route
SEA → MSO
Seattle–Tacoma International Airport Missoula Montana Airport
How punctual is this route?
- On-time arrivals
- 84.4%
- Less than 15 minutes late
- Cancelled
- 0.8%
- Of scheduled flights
- Average delay when late
- 58 min
- Flights arriving 15+ minutes late
- Flights tracked
- 658
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 46%
- Late-arriving aircraft 33%
- Air traffic control & airport 12%
- Extreme weather 9%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 100.0% | 25 |
| October 2025 | 86.5% | 37 |
| November 2025 | 82.5% | 59 |
| December 2025 | 80.6% | 62 |
| January 2026 | 89.8% | 62 |
| February 2026 | 94.9% | 39 |
| March 2026 | 75.0% | 57 |
| April 2026 | 88.2% | 68 |
| May 2026 | 93.0% | 43 |
| June 2026 | 79.2% | 77 |
| July 2026 | 81.8% | 66 |
| August 2026 | 77.8% | 63 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Alaska Airlines | 553 | 84.5% | 0.9% | 60 min |
| SkyWest Airlines | 105 | 83.8% | 0.0% | 46 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
AS660
12% late · 157 flights
-
AS697
16% late · 120 flights
-
AS139
9% late · 70 flights
-
OO3101
11% late · 70 flights
-
OO3064
26% late · 35 flights
-
AS664
15% late · 34 flights
-
AS518
13% late · 30 flights
-
AS1330
18% late · 28 flights
-
AS406
28% late · 25 flights
-
AS560
28% late · 25 flights
-
AS1480
30% late · 20 flights
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