Friedman Memorial in December 2025

76.2%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 December 2025, reporting carriers scheduled 265 domestic departures from Friedman Memorial (SUN). 76.2% left less than 15 minutes late and 76.6% reached their destination on time; 3.8% were cancelled.

Nationally that month, 72.0% of flights departed on time and 71.9% arrived on time, so SUN departures were 4.2 points above the national departure figure.

A year earlier, in December 2024, the airport had 205 departures with 84.9% leaving on time: a change of −8.7 points, with flights up 29%.

Flights arriving at SUN that month were on time 74.2% of the time (267 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 37%, national aviation system 24% and extreme weather 21%.

On time 76.6%
Arrived 15+ minutes late 19.6%
Cancelled 3.8%
Diverted 0.0%

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

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

Measure	Dec 2025	Dec 2024	SUN, 12 months to Jul 2026	All reported flights, Dec 2025
Departed on time	76.2%	84.9%	84.7%	72.0%
Arrived on time	76.6%	79.0%	83.0%	71.9%
Cancelled	3.8%	2.0%	1.1%	1.5%
Average departure delay (late minutes only)	32.3 min	13.2 min	16.2 min	21.2 min
Scheduled departures a day	9	7	8	19,410
Scheduled departures	265	205	2,745	582,304

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	265	100%	76.6%	19.0 min	3.8%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SUN–SLC	Sun Valley/Hailey/Ketchum to Salt Lake City	90	88.9%	-0.2 min	4.4%
SUN–DEN	Sun Valley/Hailey/Ketchum to Denver	48	83.3%	8.4 min	0.0%
SUN–LAX	Sun Valley/Hailey/Ketchum to Los Angeles	41	92.7%	-9.7 min	2.4%
SUN–SFO	Sun Valley/Hailey/Ketchum to San Francisco	33	57.6%	54.7 min	0.0%
SUN–ORD	Sun Valley/Hailey/Ketchum to Chicago	28	32.1%	80.3 min	10.7%
SUN–PHX	Sun Valley/Hailey/Ketchum to Phoenix	13	61.5%	78.3 min	15.4%
SUN–SEA	Sun Valley/Hailey/Ketchum to Seattle	12	75.0%	14.9 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), December 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Dec 2025	Minutes
Air carrier	37.4%	33.3%	3,021
Late-arriving aircraft	17.1%	41.1%	1,382
National Aviation System	24.3%	19.1%	1,958
Extreme weather	21.2%	6.4%	1,713
Security	0.0%	0.2%	0

8,074 delay minutes on 52 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 December 2025?

76.2% of 265 scheduled domestic departures left less than 15 minutes late, and 76.6% reached their destination on time. The national figures that month were 72.0% and 71.9%.

How does that compare with a year earlier?

In December 2024, 84.9% of 205 departures left on time and 2.0% were cancelled, against 76.2% and 3.8% in December 2025.

Provenance

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