Missoula Montana in December 2023

78.7%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 December 2023, reporting carriers scheduled 253 domestic departures from Missoula Montana (MSO). 78.7% left less than 15 minutes late and 76.3% reached their destination on time; 0.8% were cancelled.

Nationally that month, 83.1% of flights departed on time and 83.8% arrived on time, so MSO departures were 4.4 points below the national departure figure.

Flights arriving at MSO that month were on time 82.6% of the time (253 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 40%, air carrier 35% and extreme weather 21%.

On time 76.3%
Arrived 15+ minutes late 22.9%
Cancelled 0.8%
Diverted 0.0%

Every scheduled departure from MSO in December 2023, judged by arrival at the destination.

December 2023 against a year earlier, the airport's year and the nation

Measure	Dec 2023	Year earlier	MSO, 12 months to Jul 2026	All reported flights, Dec 2023
Departed on time	78.7%	—	83.4%	83.1%
Arrived on time	76.3%	—	82.1%	83.8%
Cancelled	0.8%	—	0.7%	0.4%
Average departure delay (late minutes only)	44.3 min	—	14.8 min	11.6 min
Scheduled departures a day	8	—	14	19,013
Scheduled departures	253	—	5,003	570,394

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	104	41%	82.7%	29.5 min	1.9%
UA United Airlines	62	25%	67.7%	58.0 min	0.0%
DL Delta Air Lines	31	12%	54.8%	73.5 min	0.0%
G4 Allegiant Air	25	10%	80.0%	-2.6 min	0.0%
MQ Envoy Air	19	8%	89.5%	-18.5 min	0.0%
AA American Airlines	12	5%	91.7%	-21.0 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
MSO–SLC	Missoula to Salt Lake City	86	86.0%	32.3 min	1.2%
MSO–DEN	Missoula to Denver	62	67.7%	58.0 min	0.0%
MSO–DFW	Missoula to Dallas/Fort Worth	31	90.3%	-19.5 min	0.0%
MSO–MSP	Missoula to Minneapolis	31	54.8%	73.5 min	0.0%
MSO–SEA	Missoula to Seattle	18	66.7%	15.1 min	5.6%
MSO–LAS	Missoula to Las Vegas	13	92.3%	-17.0 min	0.0%
MSO–AZA	Missoula to Phoenix	12	66.7%	13.1 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), December 2023.

Delay causes

BTS cause category	Share of delay minutes	National, Dec 2023	Minutes
Air carrier	34.6%	37.1%	3,726
Late-arriving aircraft	39.7%	38.8%	4,279
National Aviation System	5.0%	17.6%	539
Extreme weather	20.6%	6.2%	2,221
Security	0.0%	0.3%	0

10,765 delay minutes on 58 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 December 2023?

78.7% of 253 scheduled domestic departures left less than 15 minutes late, and 76.3% reached their destination on time. The national figures that month were 83.1% and 83.8%.

How does that compare with a year earlier?

December 2022 is outside the 36 months on file, or the airport had too few reported flights that month.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for December 2023; 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.