Glacier Park International in May 2026

84.4%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 May 2026, reporting carriers scheduled 334 domestic departures from Glacier Park International (FCA). 84.4% left less than 15 minutes late and 81.4% reached their destination on time; 0.6% were cancelled.

Nationally that month, 77.1% of flights departed on time and 77.6% arrived on time, so FCA departures were 7.3 points above the national departure figure.

A year earlier, in May 2025, the airport had 318 departures with 85.5% leaving on time: a change of −1.1 points, with flights up 5%.

Flights arriving at FCA that month were on time 84.4% of the time (334 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 37%, late-arriving aircraft 32% and national aviation system 24%.

On time 81.4%
Arrived 15+ minutes late 17.7%
Cancelled 0.6%
Diverted 0.3%

Every scheduled departure from FCA in May 2026, judged by arrival at the destination.

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

Measure	May 2026	May 2025	FCA, 12 months to Jul 2026	All reported flights, May 2026
Departed on time	84.4%	85.5%	81.0%	77.1%
Arrived on time	81.4%	81.8%	80.1%	77.6%
Cancelled	0.6%	0.3%	0.9%	0.9%
Average departure delay (late minutes only)	11.0 min	18.0 min	17.8 min	16.0 min
Scheduled departures a day	11	11	11	20,391
Scheduled departures	334	318	4,115	611,735

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	116	35%	81.0%	3.8 min	0.9%
UA United Airlines	81	24%	88.9%	-2.6 min	0.0%
DL Delta Air Lines	74	22%	83.8%	-2.5 min	0.0%
AA American Airlines	46	14%	65.2%	11.5 min	2.2%
G4 Allegiant Air	17	5%	82.4%	-2.3 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
FCA–SLC	Kalispell to Salt Lake City	113	84.1%	2.0 min	0.0%
FCA–DEN	Kalispell to Denver	84	89.3%	-6.7 min	0.0%
FCA–ORD	Kalispell to Chicago	33	75.8%	14.7 min	0.0%
FCA–MSP	Kalispell to Minneapolis	31	83.9%	-3.3 min	0.0%
FCA–DFW	Kalispell to Dallas/Fort Worth	24	62.5%	11.5 min	4.2%
FCA–LAX	Kalispell to Los Angeles	11	90.9%	-9.9 min	0.0%
FCA–SFO	Kalispell to San Francisco	11	18.2%	40.5 min	9.1%
FCA–PDX	Kalispell to Portland	10	100.0%	-3.9 min	0.0%
FCA–AZA	Kalispell to Phoenix	9	77.8%	3.1 min	0.0%
FCA–LAS	Kalispell to Las Vegas	8	87.5%	-8.4 min	0.0%

By scheduled departure hour

On-time share:under 62%6270768288% and over

Share of departures that left less than 15 minutes late, by scheduled hour (local time), May 2026.

Delay causes

BTS cause category	Share of delay minutes	National, May 2026	Minutes
Air carrier	36.9%	33.0%	1,238
Late-arriving aircraft	31.8%	40.4%	1,068
National Aviation System	24.1%	20.5%	808
Extreme weather	7.2%	6.0%	241
Security	0.0%	0.1%	0

3,355 delay minutes on 59 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 May 2026?

84.4% of 334 scheduled domestic departures left less than 15 minutes late, and 81.4% reached their destination on time. The national figures that month were 77.1% and 77.6%.

How does that compare with a year earlier?

In May 2025, 85.5% of 318 departures left on time and 0.3% were cancelled, against 84.4% and 0.6% in May 2026.

Provenance

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