Missoula Montana in August 2023

84.9%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 August 2023, reporting carriers scheduled 450 domestic departures from Missoula Montana (MSO). 84.9% left less than 15 minutes late and 82.0% reached their destination on time; 0.4% were cancelled.

Nationally that month, 76.7% of flights departed on time and 76.9% arrived on time, so MSO departures were 8.2 points above the national departure figure.

Flights arriving at MSO that month were on time 82.2% of the time (449 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 37%, late-arriving aircraft 36% and national aviation system 17%.

On time 82.0%
Arrived 15+ minutes late 17.3%
Cancelled 0.4%
Diverted 0.2%

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

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

Measure	Aug 2023	Year earlier	MSO, 12 months to Jul 2026	All reported flights, Aug 2023
Departed on time	84.9%	—	83.4%	76.7%
Arrived on time	82.0%	—	82.1%	76.9%
Cancelled	0.4%	—	0.7%	1.5%
Average departure delay (late minutes only)	13.6 min	—	14.8 min	17.3 min
Scheduled departures a day	15	—	14	20,100
Scheduled departures	450	—	5,003	602,987

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	159	35%	88.7%	-4.5 min	0.0%
DL Delta Air Lines	93	21%	88.2%	4.0 min	1.1%
UA United Airlines	93	21%	72.0%	24.5 min	1.1%
AA American Airlines	45	10%	82.2%	1.1 min	0.0%
MQ Envoy Air	31	7%	77.4%	4.8 min	0.0%
G4 Allegiant Air	29	6%	62.1%	14.2 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
MSO–DEN	Missoula to Denver	93	65.6%	29.2 min	1.1%
MSO–SLC	Missoula to Salt Lake City	93	96.8%	-4.8 min	0.0%
MSO–MSP	Missoula to Minneapolis	62	87.1%	-0.6 min	1.6%
MSO–ORD	Missoula to Chicago	62	75.8%	6.5 min	0.0%
MSO–DFW	Missoula to Dallas/Fort Worth	45	82.2%	1.1 min	0.0%
MSO–LAX	Missoula to Los Angeles	35	88.6%	-6.9 min	0.0%
MSO–SFO	Missoula to San Francisco	33	93.9%	-6.3 min	0.0%
MSO–AZA	Missoula to Phoenix	9	100.0%	-4.6 min	0.0%
MSO–LAS	Missoula to Las Vegas	8	37.5%	33.6 min	0.0%
MSO–OAK	Missoula to Oakland	4	75.0%	18.0 min	0.0%
MSO–SNA	Missoula to Santa Ana	4	50.0%	13.0 min	0.0%
MSO–SAN	Missoula to San Diego	2	50.0%	-2.5 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), August 2023.

Delay causes

BTS cause category	Share of delay minutes	National, Aug 2023	Minutes
Air carrier	36.7%	36.7%	2,226
Late-arriving aircraft	36.0%	42.2%	2,185
National Aviation System	17.2%	15.7%	1,043
Extreme weather	9.9%	5.1%	603
Security	0.1%	0.2%	6

6,063 delay minutes on 78 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 August 2023?

84.9% of 450 scheduled domestic departures left less than 15 minutes late, and 82.0% reached their destination on time. The national figures that month were 76.7% and 76.9%.

How does that compare with a year earlier?

August 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 August 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.