Airports › Missoula (MSO) › May 2025
Airport month · May 2025
Missoula Montana in May 2025
BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.
In May 2025, reporting carriers scheduled 324 domestic departures from Missoula Montana (MSO). 78.1% left less than 15 minutes late and 78.7% reached their destination on time; 0.6% were cancelled.
Nationally that month, 76.7% of flights departed on time and 75.4% arrived on time, so MSO departures were 1.4 points above the national departure figure.
A year earlier, in May 2024, the airport had 363 departures with 83.7% leaving on time: a change of −5.6 points, with flights down 11%.
Flights arriving at MSO that month were on time 77.8% of the time (324 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, national aviation system 41%, late-arriving aircraft 26% and air carrier 21%.
- On time 78.7%
- Arrived 15+ minutes late 20.1%
- Cancelled 0.6%
- Diverted 0.6%
May 2025 against a year earlier, the airport's year and the nation
| Measure | May 2025 | May 2024 | MSO, 12 months to Jul 2026 | All reported flights, May 2025 |
|---|---|---|---|---|
| Departed on time | 78.1% | 83.7% | 83.4% | 76.7% |
| Arrived on time | 78.7% | 79.9% | 82.1% | 75.4% |
| Cancelled | 0.6% | 0.6% | 0.7% | 1.0% |
| Average departure delay (late minutes only) | 17.1 min | 11.7 min | 14.8 min | 17.5 min |
| Scheduled departures a day | 11 | 12 | 14 | 20,188 |
| Scheduled departures | 324 | 363 | 5,003 | 605,648 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| OO SkyWest Airlines | 98 | 30% | 83.7% | 5.8 min | 1.0% |
| UA United Airlines | 77 | 24% | 76.6% | 14.3 min | 0.0% |
| DL Delta Air Lines | 62 | 19% | 93.5% | 1.0 min | 0.0% |
| AS Alaska Airlines | 31 | 10% | 67.7% | 11.6 min | 0.0% |
| AA American Airlines | 27 | 8% | 55.6% | 26.7 min | 3.7% |
| G4 Allegiant Air | 24 | 7% | 70.8% | 18.0 min | 0.0% |
| MQ Envoy Air | 4 | 1% | 75.0% | 56.3 min | 0.0% |
| F9 Frontier Airlines | 1 | 0% | 0.0% | 24.0 min | 0.0% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| MSO–DEN | Missoula to Denver | 94 | 64.9% | 26.3 min | 1.1% |
| MSO–SLC | Missoula to Salt Lake City | 93 | 96.8% | -9.3 min | 0.0% |
| MSO–DFW | Missoula to Dallas/Fort Worth | 31 | 58.1% | 30.6 min | 3.2% |
| MSO–MSP | Missoula to Minneapolis | 31 | 93.5% | 9.3 min | 0.0% |
| MSO–SEA | Missoula to Seattle | 31 | 67.7% | 11.6 min | 0.0% |
| MSO–AZA | Missoula to Phoenix | 10 | 60.0% | 33.0 min | 0.0% |
| MSO–ORD | Missoula to Chicago | 10 | 100.0% | -9.6 min | 0.0% |
| MSO–SFO | Missoula to San Francisco | 10 | 90.0% | -0.7 min | 0.0% |
| MSO–LAS | Missoula to Las Vegas | 9 | 88.9% | 5.4 min | 0.0% |
| MSO–SNA | Missoula to Santa Ana | 5 | 60.0% | 10.4 min | 0.0% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left MSO on time in May 2025?
78.1% of 324 scheduled domestic departures left less than 15 minutes late, and 78.7% reached their destination on time. The national figures that month were 76.7% and 75.4%.
How does that compare with a year earlier?
In May 2024, 83.7% of 363 departures left on time and 0.6% were cancelled, against 78.1% and 0.6% in May 2025.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for May 2025; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for MSO · methodology · corrections.