Helena Regional in May 2025

85.8%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 2025, reporting carriers scheduled 148 domestic departures from Helena Regional (HLN). 85.8% left less than 15 minutes late and 79.7% reached their destination on time; 0.7% were cancelled.

Nationally that month, 76.7% of flights departed on time and 75.4% arrived on time, so HLN departures were 9.1 points above the national departure figure.

A year earlier, in May 2024, the airport had 124 departures with 87.9% leaving on time: a change of −2.1 points, with flights up 19%.

Flights arriving at HLN that month were on time 83.8% of the time (148 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, national aviation system 47%, air carrier 30% and extreme weather 15%.

On time 79.7%
Arrived 15+ minutes late 18.9%
Cancelled 0.7%
Diverted 0.7%

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

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

Measure	May 2025	May 2024	HLN, 12 months to Jul 2026	All reported flights, May 2025
Departed on time	85.8%	87.9%	89.3%	76.7%
Arrived on time	79.7%	86.3%	87.5%	75.4%
Cancelled	0.7%	0.0%	0.4%	1.0%
Average departure delay (late minutes only)	15.7 min	16.9 min	11.4 min	17.5 min
Scheduled departures a day	5	4	4	20,188
Scheduled departures	148	124	1,549	605,648

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	148	100%	79.7%	8.9 min	0.7%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
HLN–DEN	Helena to Denver	72	69.4%	22.5 min	1.4%
HLN–SLC	Helena to Salt Lake City	62	98.4%	-9.9 min	0.0%
HLN–SEA	Helena to Seattle	14	50.0%	23.6 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), May 2025.

Delay causes

BTS cause category	Share of delay minutes	National, May 2025	Minutes
Air carrier	29.7%	29.3%	814
Late-arriving aircraft	8.1%	37.8%	221
National Aviation System	47.4%	25.9%	1,298
Extreme weather	14.8%	6.9%	406
Security	0.0%	0.1%	0

2,739 delay minutes on 28 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 May 2025?

85.8% of 148 scheduled domestic departures left less than 15 minutes late, and 79.7% reached their destination on time. The national figures that month were 76.7% and 75.4%.

How does that compare with a year earlier?

In May 2024, 87.9% of 124 departures left on time and 0.0% were cancelled, against 85.8% and 0.7% in May 2025.

Provenance

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