Friedman Memorial in August 2023

87.7%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 2023, reporting carriers scheduled 163 domestic departures from Friedman Memorial (SUN). 87.7% left less than 15 minutes late and 85.3% reached their destination on time; 1.2% were cancelled.

Nationally that month, 76.7% of flights departed on time and 76.9% arrived on time, so SUN departures were 11.0 points above the national departure figure.

Flights arriving at SUN that month were on time 92.0% of the time (163 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 45%, extreme weather 23% and late-arriving aircraft 19%.

On time 85.3%
Arrived 15+ minutes late 12.9%
Cancelled 1.2%
Diverted 0.6%

Every scheduled departure from SUN in August 2023, judged by arrival at the destination.

August 2023 against a year earlier, the airport's year and the nation

Measure	Aug 2023	Year earlier	SUN, 12 months to Jul 2026	All reported flights, Aug 2023
Departed on time	87.7%	—	84.7%	76.7%
Arrived on time	85.3%	—	83.0%	76.9%
Cancelled	1.2%	—	1.1%	1.5%
Average departure delay (late minutes only)	13.9 min	—	16.2 min	17.3 min
Scheduled departures a day	5	—	8	20,100
Scheduled departures	163	—	2,745	602,987

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	163	100%	85.3%	2.4 min	1.2%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SUN–SLC	Sun Valley/Hailey/Ketchum to Salt Lake City	62	93.5%	-6.3 min	0.0%
SUN–DEN	Sun Valley/Hailey/Ketchum to Denver	31	64.5%	26.2 min	3.2%
SUN–LAX	Sun Valley/Hailey/Ketchum to Los Angeles	31	93.5%	-10.9 min	3.2%
SUN–SFO	Sun Valley/Hailey/Ketchum to San Francisco	31	80.6%	-0.7 min	0.0%
SUN–ORD	Sun Valley/Hailey/Ketchum to Chicago	8	87.5%	44.1 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), August 2023.

Delay causes

BTS cause category	Share of delay minutes	National, Aug 2023	Minutes
Air carrier	45.0%	36.7%	1,000
Late-arriving aircraft	18.5%	42.2%	412
National Aviation System	13.4%	15.7%	298
Extreme weather	23.0%	5.1%	512
Security	0.0%	0.2%	0

2,222 delay minutes on 21 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 2023?

87.7% of 163 scheduled domestic departures left less than 15 minutes late, and 85.3% reached their destination on time. The national figures that month were 76.7% and 76.9%.

How does that compare with a year earlier?

August 2022 is outside the 36 months on file, or the airport had too few reported flights that month.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for August 2023; 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.