Friedman Memorial in September 2025

92.9%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 183 domestic departures from Friedman Memorial (SUN). 92.9% left less than 15 minutes late and 90.2% 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 SUN departures were 9.8 points above the national departure figure.

A year earlier, in September 2024, the airport had 137 departures with 94.2% leaving on time: a change of −1.3 points, with flights up 34%.

Flights arriving at SUN that month were on time 92.3% of the time (182 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, extreme weather 35%, national aviation system 33% and air carrier 21%.

On time 90.2%
Arrived 15+ minutes late 9.8%
Cancelled 0.0%
Diverted 0.0%

Every scheduled departure from SUN 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	SUN, 12 months to Jul 2026	All reported flights, Sep 2025
Departed on time	92.9%	94.2%	84.7%	83.1%
Arrived on time	90.2%	92.7%	83.0%	82.8%
Cancelled	0.0%	0.0%	1.1%	0.5%
Average departure delay (late minutes only)	8.0 min	10.7 min	16.2 min	12.2 min
Scheduled departures a day	6	5	8	18,748
Scheduled departures	183	137	2,745	562,439

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	183	100%	90.2%	-2.7 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SUN–SLC	Sun Valley/Hailey/Ketchum to Salt Lake City	90	96.7%	-5.6 min	0.0%
SUN–DEN	Sun Valley/Hailey/Ketchum to Denver	60	88.3%	-1.0 min	0.0%
SUN–SFO	Sun Valley/Hailey/Ketchum to San Francisco	14	78.6%	2.8 min	0.0%
SUN–LAX	Sun Valley/Hailey/Ketchum to Los Angeles	13	76.9%	-6.4 min	0.0%
SUN–ORD	Sun Valley/Hailey/Ketchum to Chicago	6	66.7%	17.5 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), September 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Sep 2025	Minutes
Air carrier	20.9%	34.3%	310
Late-arriving aircraft	10.6%	37.4%	157
National Aviation System	33.2%	22.6%	493
Extreme weather	35.3%	5.6%	524
Security	0.0%	0.1%	0

1,484 delay minutes on 18 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 SUN on time in September 2025?

92.9% of 183 scheduled domestic departures left less than 15 minutes late, and 90.2% 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, 94.2% of 137 departures left on time and 0.0% were cancelled, against 92.9% 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 SUN · methodology · corrections.