Friedman Memorial in August 2025

88.0%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 August 2025, reporting carriers scheduled 249 domestic departures from Friedman Memorial (SUN). 88.0% left less than 15 minutes late and 87.1% reached their destination on time; 0.4% were cancelled.

Nationally that month, 76.8% of flights departed on time and 76.3% arrived on time, so SUN departures were 11.2 points above the national departure figure.

A year earlier, in August 2024, the airport had 195 departures with 83.1% leaving on time: a change of +4.9 points, with flights up 28%.

Flights arriving at SUN that month were on time 86.7% of the time (248 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 66%, national aviation system 24% and late-arriving aircraft 7%.

On time 87.1%
Arrived 15+ minutes late 11.6%
Cancelled 0.4%
Diverted 0.8%

Every scheduled departure from SUN in August 2025, judged by arrival at the destination.

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

Measure	Aug 2025	Aug 2024	SUN, 12 months to Jul 2026	All reported flights, Aug 2025
Departed on time	88.0%	83.1%	84.7%	76.8%
Arrived on time	87.1%	82.6%	83.0%	76.3%
Cancelled	0.4%	0.0%	1.1%	1.1%
Average departure delay (late minutes only)	14.6 min	25.7 min	16.2 min	17.6 min
Scheduled departures a day	8	7	8	20,079
Scheduled departures	249	195	2,745	602,378

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	249	100%	87.1%	4.0 min	0.4%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SUN–SLC	Sun Valley/Hailey/Ketchum to Salt Lake City	93	95.7%	-3.7 min	0.0%
SUN–DEN	Sun Valley/Hailey/Ketchum to Denver	62	72.6%	24.0 min	0.0%
SUN–LAX	Sun Valley/Hailey/Ketchum to Los Angeles	46	95.7%	-5.9 min	0.0%
SUN–SFO	Sun Valley/Hailey/Ketchum to San Francisco	34	79.4%	8.4 min	0.0%
SUN–ORD	Sun Valley/Hailey/Ketchum to Chicago	14	85.7%	-11.2 min	7.1%

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), August 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Aug 2025	Minutes
Air carrier	66.3%	33.1%	2,356
Late-arriving aircraft	6.9%	40.5%	246
National Aviation System	23.7%	19.2%	841
Extreme weather	3.2%	7.0%	112
Security	0.0%	0.1%	0

3,555 delay minutes on 29 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 August 2025?

88.0% of 249 scheduled domestic departures left less than 15 minutes late, and 87.1% reached their destination on time. The national figures that month were 76.8% and 76.3%.

How does that compare with a year earlier?

In August 2024, 83.1% of 195 departures left on time and 0.0% were cancelled, against 88.0% and 0.4% in August 2025.

Provenance

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