Glacier Park International in December 2025

71.6%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 2025, reporting carriers scheduled 285 domestic departures from Glacier Park International (FCA). 71.6% left less than 15 minutes late and 74.4% reached their destination on time; 0.7% were cancelled.

Nationally that month, 72.0% of flights departed on time and 71.9% arrived on time, so FCA departures were level with the national departure figure.

A year earlier, in December 2024, the airport had 259 departures with 85.3% leaving on time: a change of −13.7 points, with flights up 10%.

Flights arriving at FCA that month were on time 69.5% of the time (285 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 31%, national aviation system 30% and air carrier 28%.

On time 74.4%
Arrived 15+ minutes late 24.9%
Cancelled 0.7%
Diverted 0.0%

Every scheduled departure from FCA in December 2025, judged by arrival at the destination.

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

Measure	Dec 2025	Dec 2024	FCA, 12 months to Jul 2026	All reported flights, Dec 2025
Departed on time	71.6%	85.3%	81.0%	72.0%
Arrived on time	74.4%	82.6%	80.1%	71.9%
Cancelled	0.7%	0.0%	0.9%	1.5%
Average departure delay (late minutes only)	24.3 min	15.0 min	17.8 min	21.2 min
Scheduled departures a day	10	9	11	19,410
Scheduled departures	285	259	4,115	582,304

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	117	41%	80.3%	-2.2 min	1.7%
UA United Airlines	90	32%	73.3%	17.2 min	0.0%
DL Delta Air Lines	62	22%	71.0%	15.7 min	0.0%
G4 Allegiant Air	16	6%	50.0%	27.7 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
FCA–SLC	Kalispell to Salt Lake City	90	88.9%	-1.9 min	1.1%
FCA–DEN	Kalispell to Denver	76	76.3%	17.5 min	0.0%
FCA–MSP	Kalispell to Minneapolis	40	57.5%	11.0 min	2.5%
FCA–ORD	Kalispell to Chicago	15	60.0%	11.3 min	0.0%
FCA–PDX	Kalispell to Portland	15	73.3%	16.1 min	0.0%
FCA–SEA	Kalispell to Seattle	15	93.3%	-10.9 min	0.0%
FCA–SFO	Kalispell to San Francisco	14	50.0%	26.2 min	0.0%
FCA–LAS	Kalispell to Las Vegas	9	66.7%	25.9 min	0.0%
FCA–AZA	Kalispell to Phoenix	7	28.6%	30.0 min	0.0%
FCA–LAX	Kalispell to Los Angeles	4	50.0%	16.0 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 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Dec 2025	Minutes
Air carrier	28.3%	33.3%	1,715
Late-arriving aircraft	30.7%	41.1%	1,860
National Aviation System	30.3%	19.1%	1,832
Extreme weather	10.7%	6.4%	648
Security	0.0%	0.2%	0

6,055 delay minutes on 71 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 FCA on time in December 2025?

71.6% of 285 scheduled domestic departures left less than 15 minutes late, and 74.4% reached their destination on time. The national figures that month were 72.0% and 71.9%.

How does that compare with a year earlier?

In December 2024, 85.3% of 259 departures left on time and 0.0% were cancelled, against 71.6% and 0.7% in December 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for December 2025; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for FCA · methodology · corrections.