Missoula Montana in July 2026

80.9%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 July 2026, reporting carriers scheduled 627 domestic departures from Missoula Montana (MSO). 80.9% left less than 15 minutes late and 80.1% reached their destination on time; 0.0% were cancelled.

Nationally that month, 68.8% of flights departed on time and 69.4% arrived on time, so MSO departures were 12.1 points above the national departure figure.

A year earlier, in July 2025, the airport had 579 departures with 79.3% leaving on time: a change of +1.6 points, with flights up 8%.

Flights arriving at MSO that month were on time 81.9% of the time (626 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 41%, national aviation system 28% and late-arriving aircraft 22%.

On time 80.1%
Arrived 15+ minutes late 19.3%
Cancelled 0.0%
Diverted 0.6%

Every scheduled departure from MSO in July 2026, judged by arrival at the destination.

July 2026 against a year earlier, the airport's year and the nation

Measure	Jul 2026	Jul 2025	MSO, 12 months to Jul 2026	All reported flights, Jul 2026
Departed on time	80.9%	79.3%	83.4%	68.8%
Arrived on time	80.1%	74.1%	82.1%	69.4%
Cancelled	0.0%	0.7%	0.7%	2.6%
Average departure delay (late minutes only)	16.3 min	20.3 min	14.8 min	24.1 min
Scheduled departures a day	21	19	14	21,066
Scheduled departures	627	579	5,003	631,970

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	282	45%	78.0%	10.9 min	0.0%
DL Delta Air Lines	93	15%	94.6%	-2.5 min	0.0%
UA United Airlines	92	15%	75.0%	24.5 min	0.0%
MQ Envoy Air	62	10%	83.9%	3.5 min	0.0%
AS Alaska Airlines	36	6%	80.6%	3.1 min	0.0%
G4 Allegiant Air	32	5%	81.3%	1.4 min	0.0%
AA American Airlines	30	5%	60.0%	28.9 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
MSO–DEN	Missoula to Denver	122	75.4%	25.9 min	0.0%
MSO–SLC	Missoula to Salt Lake City	92	91.3%	-4.7 min	0.0%
MSO–ORD	Missoula to Chicago	67	80.6%	17.3 min	0.0%
MSO–SEA	Missoula to Seattle	67	80.6%	4.8 min	0.0%
MSO–LAX	Missoula to Los Angeles	62	75.8%	10.4 min	0.0%
MSO–MSP	Missoula to Minneapolis	62	93.5%	0.1 min	0.0%
MSO–DFW	Missoula to Dallas/Fort Worth	61	73.8%	11.2 min	0.0%
MSO–PDX	Missoula to Portland	31	83.9%	3.5 min	0.0%
MSO–SFO	Missoula to San Francisco	31	51.6%	20.5 min	0.0%
MSO–AZA	Missoula to Phoenix	14	85.7%	4.6 min	0.0%
MSO–LAS	Missoula to Las Vegas	9	100.0%	-12.6 min	0.0%
MSO–SNA	Missoula to Santa Ana	9	55.6%	10.2 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), July 2026.

Delay causes

BTS cause category	Share of delay minutes	National, Jul 2026	Minutes
Air carrier	41.1%	31.7%	4,021
Late-arriving aircraft	22.4%	41.8%	2,186
National Aviation System	28.4%	19.9%	2,780
Extreme weather	8.1%	6.5%	791
Security	0.0%	0.1%	0

9,778 delay minutes on 121 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 July 2026?

80.9% of 627 scheduled domestic departures left less than 15 minutes late, and 80.1% reached their destination on time. The national figures that month were 68.8% and 69.4%.

How does that compare with a year earlier?

In July 2025, 79.3% of 579 departures left on time and 0.7% were cancelled, against 80.9% and 0.0% in July 2026.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for July 2026; 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.