Missoula Montana in September 2024

85.9%departed on time

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 September 2024, reporting carriers scheduled 376 domestic departures from Missoula Montana (MSO). 85.9% left less than 15 minutes late and 86.2% reached their destination on time; 0.0% were cancelled.

Nationally that month, 84.4% of flights departed on time and 83.9% arrived on time, so MSO departures were 1.5 points above the national departure figure.

A year earlier, in September 2023, the airport had 375 departures with 88.5% leaving on time: a change of −2.6 points, with flights up 0%.

Flights arriving at MSO that month were on time 86.2% of the time (376 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 41%, air carrier 40% and national aviation system 14%.

On time 86.2%
Arrived 15+ minutes late 13.8%
Cancelled 0.0%
Diverted 0.0%

Every scheduled departure from MSO in September 2024, judged by arrival at the destination.

September 2024 against a year earlier, the airport's year and the nation

Measure	Sep 2024	Sep 2023	MSO, 12 months to Jul 2026	All reported flights, Sep 2024
Departed on time	85.9%	88.5%	83.4%	84.4%
Arrived on time	86.2%	87.2%	82.1%	83.9%
Cancelled	0.0%	0.0%	0.7%	0.6%
Average departure delay (late minutes only)	9.6 min	11.0 min	14.8 min	10.6 min
Scheduled departures a day	13	13	14	19,421
Scheduled departures	376	375	5,003	582,622

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
UA United Airlines	92	24%	82.6%	4.0 min	0.0%
OO SkyWest Airlines	86	23%	95.3%	-7.8 min	0.0%
DL Delta Air Lines	81	22%	95.1%	-2.8 min	0.0%
AA American Airlines	30	8%	86.7%	4.3 min	0.0%
MQ Envoy Air	30	8%	73.3%	5.8 min	0.0%
AS Alaska Airlines	29	8%	69.0%	10.0 min	0.0%
G4 Allegiant Air	18	5%	61.1%	14.2 min	0.0%
F9 Frontier Airlines	10	3%	100.0%	-5.1 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
MSO–DEN	Missoula to Denver	102	84.3%	3.1 min	0.0%
MSO–SLC	Missoula to Salt Lake City	88	97.7%	-3.7 min	0.0%
MSO–ORD	Missoula to Chicago	55	80.0%	-0.5 min	0.0%
MSO–MSP	Missoula to Minneapolis	51	94.1%	-6.0 min	0.0%
MSO–DFW	Missoula to Dallas/Fort Worth	30	86.7%	4.3 min	0.0%
MSO–SEA	Missoula to Seattle	29	69.0%	10.0 min	0.0%
MSO–AZA	Missoula to Phoenix	9	55.6%	12.1 min	0.0%
MSO–LAS	Missoula to Las Vegas	9	66.7%	16.3 min	0.0%
MSO–LAX	Missoula to Los Angeles	3	100.0%	-19.3 min	0.0%

By scheduled departure hour

100

On-time share:under 62%6270768288% and over

Share of departures that left less than 15 minutes late, by scheduled hour (local time), September 2024.

Delay causes

BTS cause category	Share of delay minutes	National, Sep 2024	Minutes
Air carrier	40.3%	38.6%	1,238
Late-arriving aircraft	40.8%	38.4%	1,256
National Aviation System	14.1%	18.2%	434
Extreme weather	4.8%	4.8%	147
Security	0.0%	0.1%	0

3,075 delay minutes on 52 flights that arrived 15 or more minutes late and carried a cause report. Carriers assign the categories; see what each category means.

Questions and answers

How many flights left MSO on time in September 2024?

85.9% of 376 scheduled domestic departures left less than 15 minutes late, and 86.2% reached their destination on time. The national figures that month were 84.4% and 83.9%.

How does that compare with a year earlier?

In September 2023, 88.5% of 375 departures left on time and 0.0% were cancelled, against 85.9% and 0.0% in September 2024.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for September 2024; 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.