Missoula Montana in June 2025

81.5%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 June 2025, reporting carriers scheduled 507 domestic departures from Missoula Montana (MSO). 81.5% left less than 15 minutes late and 78.3% reached their destination on time; 0.2% were cancelled.

Nationally that month, 71.4% of flights departed on time and 70.3% arrived on time, so MSO departures were 10.1 points above the national departure figure.

A year earlier, in June 2024, the airport had 508 departures with 78.1% leaving on time: a change of +3.4 points, with flights down 0%.

Flights arriving at MSO that month were on time 74.9% of the time (509 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 45%, late-arriving aircraft 31% and national aviation system 21%.

On time 78.3%
Arrived 15+ minutes late 20.7%
Cancelled 0.2%
Diverted 0.8%

Every scheduled departure from MSO in June 2025, judged by arrival at the destination.

June 2025 against a year earlier, the airport's year and the nation

Measure	Jun 2025	Jun 2024	MSO, 12 months to Jul 2026	All reported flights, Jun 2025
Departed on time	81.5%	78.1%	83.4%	71.4%
Arrived on time	78.3%	79.1%	82.1%	70.3%
Cancelled	0.2%	0.6%	0.7%	1.6%
Average departure delay (late minutes only)	23.2 min	20.3 min	14.8 min	22.1 min
Scheduled departures a day	17	17	14	20,386
Scheduled departures	507	508	5,003	611,575

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	155	31%	80.6%	10.1 min	0.6%
UA United Airlines	90	18%	81.1%	5.0 min	0.0%
DL Delta Air Lines	83	16%	90.4%	10.4 min	0.0%
AA American Airlines	55	11%	60.0%	21.0 min	0.0%
MQ Envoy Air	51	10%	76.5%	13.6 min	0.0%
G4 Allegiant Air	34	7%	67.6%	111.8 min	0.0%
AS Alaska Airlines	30	6%	70.0%	5.8 min	0.0%
F9 Frontier Airlines	9	2%	88.9%	-3.8 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
MSO–DEN	Missoula to Denver	104	66.3%	21.2 min	1.0%
MSO–SLC	Missoula to Salt Lake City	90	92.2%	11.0 min	0.0%
MSO–ORD	Missoula to Chicago	81	81.5%	10.6 min	0.0%
MSO–DFW	Missoula to Dallas/Fort Worth	55	60.0%	21.0 min	0.0%
MSO–MSP	Missoula to Minneapolis	53	94.3%	-6.0 min	0.0%
MSO–SFO	Missoula to San Francisco	31	87.1%	-9.6 min	0.0%
MSO–SEA	Missoula to Seattle	30	70.0%	5.8 min	0.0%
MSO–LAX	Missoula to Los Angeles	26	84.6%	4.5 min	0.0%
MSO–AZA	Missoula to Phoenix	10	90.0%	-7.0 min	0.0%
MSO–LAS	Missoula to Las Vegas	9	55.6%	247.2 min	0.0%
MSO–SNA	Missoula to Santa Ana	9	44.4%	164.8 min	0.0%
MSO–OAK	Missoula to Oakland	6	83.3%	7.7 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), June 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Jun 2025	Minutes
Air carrier	45.0%	31.6%	5,337
Late-arriving aircraft	31.2%	40.6%	3,698
National Aviation System	21.1%	20.9%	2,502
Extreme weather	2.7%	6.9%	324
Security	0.0%	0.2%	0

11,861 delay minutes on 105 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 June 2025?

81.5% of 507 scheduled domestic departures left less than 15 minutes late, and 78.3% reached their destination on time. The national figures that month were 71.4% and 70.3%.

How does that compare with a year earlier?

In June 2024, 78.1% of 508 departures left on time and 0.6% were cancelled, against 81.5% and 0.2% in June 2025.

Provenance

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