Missoula Montana Airport (MSO) delays & on-time performance
Missoula, Montana · 14 nonstop destinations · 8 airlines · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at MSO right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
On-time arrivals
83%
arrived < 15 min late
Cancelled
0.7%
37 flights
Avg arrival delay
15 min
82 min when late
Departed on time
84%
avg taxi-out 18 min
Figures cover 5,003 departures from MSO; on-time is measured at arrival. Arrivals into MSO were on time 82% of the time.
Key facts
- Flights departing Missoula Montana Airport (MSO) arrived on time 83% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0.7% were cancelled, and 6% arrived an hour or more late.
- Delta Air Lines was the most punctual airline here (91% on time); Allegiant Air was the least (73%).
- Departures scheduled around 5am did best (92% on time); around 2pm did worst (72%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (39%).
Most delayed routes from MSO
Lowest on-time arrival rates among regularly flown routes.
- ORD · Chicago75%500 flts
- DEN · Denver81%1,204 flts
- DFW · Dallas/Fort Worth82%435 flts
- SEA · Seattle82%646 flts
- MSP · Minneapolis91%489 flts
- SLC · Salt Lake City91%1,059 flts
Most reliable routes from MSO
Highest on-time arrival rates among regularly flown routes.
- SLC · Salt Lake City91%1,059 flts
- MSP · Minneapolis91%489 flts
- SEA · Seattle82%646 flts
- DFW · Dallas/Fort Worth82%435 flts
- DEN · Denver81%1,204 flts
- ORD · Chicago75%500 flts
Best airline at MSO
Departures from this airport, ranked by on-time arrival.
| Airline | On time | Cancelled | Avg delay | Routes | Flights |
|---|---|---|---|---|---|
| Delta Air Lines | 91% | 0.4% | 11 min | 2 | 956 |
| Frontier Airlines | 86% | 0.0% | 7 min | 1 | 14 |
| United Airlines | 83% | 0.6% | 16 min | 2 | 821 |
| SkyWest Airlines | 83% | 0.9% | 13 min | 8 | 1,612 |
| Alaska Airlines | 82% | 1.1% | 11 min | 1 | 538 |
| Envoy Air | 81% | 0.3% | 17 min | 2 | 637 |
| Allegiant Air | 73% | 0.7% | 23 min | 4 | 284 |
| American Airlines | 69% | 2.1% | 47 min | 1 | 141 |
Best time to fly out of MSO
On-time arrival rate by scheduled departure hour (local time).
- 5am92%511 flts
- 6am90%725 flts
- 7am91%338 flts
- 8am92%134 flts
- 10am89%160 flts
- 11am83%83 flts
- 12pm75%256 flts
- 1pm83%756 flts
- 2pm72%469 flts
- 3pm83%227 flts
- 4pm73%429 flts
- 5pm74%471 flts
- 6pm90%348 flts
Monthly trend
Why departures were late
- Airline (crew, maintenance, cleaning, fueling)39%
- Late-arriving aircraft28%
- Air traffic control & airport congestion26%
- Extreme weather8%
- Security0%
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.