Helena Regional in September 2025

86.7%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 September 2025, reporting carriers scheduled 150 domestic departures from Helena Regional (HLN). 86.7% left less than 15 minutes late and 84.0% reached their destination on time; 0.0% were cancelled.

Nationally that month, 83.1% of flights departed on time and 82.8% arrived on time, so HLN departures were 3.6 points above the national departure figure.

A year earlier, in September 2024, the airport had 120 departures with 90.0% leaving on time: a change of −3.3 points, with flights up 25%.

Flights arriving at HLN that month were on time 88.7% of the time (150 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, national aviation system 46%, air carrier 42% and late-arriving aircraft 10%.

On time 84.0%
Arrived 15+ minutes late 15.3%
Cancelled 0.0%
Diverted 0.7%

Every scheduled departure from HLN in September 2025, judged by arrival at the destination.

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

Measure	Sep 2025	Sep 2024	HLN, 12 months to Jul 2026	All reported flights, Sep 2025
Departed on time	86.7%	90.0%	89.3%	83.1%
Arrived on time	84.0%	88.3%	87.5%	82.8%
Cancelled	0.0%	0.0%	0.4%	0.5%
Average departure delay (late minutes only)	12.1 min	10.7 min	11.4 min	12.2 min
Scheduled departures a day	5	4	4	18,748
Scheduled departures	150	120	1,549	562,439

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	150	100%	84.0%	3.0 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
HLN–DEN	Helena to Denver	90	74.4%	10.8 min	0.0%
HLN–SLC	Helena to Salt Lake City	60	98.3%	-8.7 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), September 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Sep 2025	Minutes
Air carrier	41.8%	34.3%	782
Late-arriving aircraft	10.3%	37.4%	193
National Aviation System	45.8%	22.6%	858
Extreme weather	2.1%	5.6%	39
Security	0.0%	0.1%	0

1,872 delay minutes on 23 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 HLN on time in September 2025?

86.7% of 150 scheduled domestic departures left less than 15 minutes late, and 84.0% reached their destination on time. The national figures that month were 83.1% and 82.8%.

How does that compare with a year earlier?

In September 2024, 90.0% of 120 departures left on time and 0.0% were cancelled, against 86.7% and 0.0% in September 2025.

Provenance

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