Friedman Memorial in May 2025

84.0%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 May 2025, reporting carriers scheduled 144 domestic departures from Friedman Memorial (SUN). 84.0% left less than 15 minutes late and 81.3% 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 SUN departures were 7.3 points above the national departure figure.

A year earlier, in May 2024, the airport had 108 departures with 95.4% leaving on time: a change of −11.4 points, with flights up 33%.

Flights arriving at SUN that month were on time 91.1% of the time (146 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 57%, national aviation system 32% and extreme weather 11%.

On time 81.3%
Arrived 15+ minutes late 17.4%
Cancelled 0.7%
Diverted 0.7%

Every scheduled departure from SUN 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	SUN, 12 months to Jul 2026	All reported flights, May 2025
Departed on time	84.0%	95.4%	84.7%	76.7%
Arrived on time	81.3%	95.4%	83.0%	75.4%
Cancelled	0.7%	0.0%	1.1%	1.0%
Average departure delay (late minutes only)	18.6 min	4.0 min	16.2 min	17.5 min
Scheduled departures a day	5	4	8	20,188
Scheduled departures	144	108	2,745	605,648

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	144	100%	81.3%	5.6 min	0.7%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SUN–SLC	Sun Valley/Hailey/Ketchum to Salt Lake City	93	93.5%	-7.8 min	0.0%
SUN–DEN	Sun Valley/Hailey/Ketchum to Denver	41	61.0%	29.4 min	2.4%
SUN–SFO	Sun Valley/Hailey/Ketchum to San Francisco	6	33.3%	44.0 min	0.0%
SUN–LAX	Sun Valley/Hailey/Ketchum to Los Angeles	4	75.0%	28.0 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 2025.

Delay causes

BTS cause category	Share of delay minutes	National, May 2025	Minutes
Air carrier	56.8%	29.3%	1,519
Late-arriving aircraft	0.0%	37.8%	0
National Aviation System	32.0%	25.9%	855
Extreme weather	11.3%	6.9%	301
Security	0.0%	0.1%	0

2,675 delay minutes on 25 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 May 2025?

84.0% of 144 scheduled domestic departures left less than 15 minutes late, and 81.3% 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, 95.4% of 108 departures left on time and 0.0% were cancelled, against 84.0% 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 SUN · methodology · corrections.