Salt Lake City International in August 2023

82.6%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 9,621 domestic departures from Salt Lake City International (SLC). 82.6% left less than 15 minutes late and 83.2% reached their destination on time; 0.6% were cancelled.

Nationally that month, 76.7% of flights departed on time and 76.9% arrived on time, so SLC departures were 5.9 points above the national departure figure.

Flights arriving at SLC that month were on time 83.9% of the time (9,620 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 50%, late-arriving aircraft 33% and national aviation system 12%.

On time 83.2%
Arrived 15+ minutes late 15.9%
Cancelled 0.6%
Diverted 0.3%

Every scheduled departure from SLC 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	SLC, 12 months to Jul 2026	All reported flights, Aug 2023
Departed on time	82.6%	—	84.0%	76.7%
Arrived on time	83.2%	—	83.8%	76.9%
Cancelled	0.6%	—	0.8%	1.5%
Average departure delay (late minutes only)	12.7 min	—	11.0 min	17.3 min
Scheduled departures a day	321	—	323	20,100
Scheduled departures	9,621	—	117,896	602,987

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
DL Delta Air Lines	4,709	49%	82.5%	4.0 min	0.6%
OO SkyWest Airlines	2,658	28%	91.0%	-3.6 min	0.1%
WN Southwest Airlines	1,036	11%	76.4%	5.8 min	1.2%
UA United Airlines	336	3%	79.5%	6.0 min	1.8%
AA American Airlines	313	3%	75.7%	26.9 min	1.0%
B6 JetBlue Airways	217	2%	71.4%	13.2 min	1.8%
NK Spirit Airlines	138	1%	66.7%	19.6 min	0.7%
F9 Frontier Airlines	119	1%	68.9%	22.5 min	4.2%
AS Alaska Airlines	95	1%	78.9%	5.3 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SLC–DEN	Salt Lake City to Denver	680	72.2%	14.5 min	1.5%
SLC–PHX	Salt Lake City to Phoenix	405	79.3%	7.5 min	0.7%
SLC–LAS	Salt Lake City to Las Vegas	390	74.9%	11.2 min	1.8%
SLC–LAX	Salt Lake City to Los Angeles	372	79.0%	9.6 min	0.0%
SLC–SEA	Salt Lake City to Seattle	351	81.5%	4.8 min	0.6%
SLC–DFW	Salt Lake City to Dallas/Fort Worth	314	79.6%	15.0 min	0.3%
SLC–ATL	Salt Lake City to Atlanta	291	80.8%	0.7 min	1.0%
SLC–SFO	Salt Lake City to San Francisco	284	76.8%	8.2 min	0.0%
SLC–ORD	Salt Lake City to Chicago	248	78.6%	11.1 min	0.8%
SLC–PDX	Salt Lake City to Portland	204	89.7%	-3.3 min	0.0%
SLC–SAN	Salt Lake City to San Diego	201	76.6%	6.0 min	1.5%
SLC–JFK	Salt Lake City to New York	186	76.3%	-1.9 min	1.6%

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 2023.

Delay causes

BTS cause category	Share of delay minutes	National, Aug 2023	Minutes
Air carrier	50.2%	36.7%	53,744
Late-arriving aircraft	32.5%	42.2%	34,793
National Aviation System	11.9%	15.7%	12,772
Extreme weather	5.5%	5.1%	5,843
Security	0.0%	0.2%	12

107,164 delay minutes on 1,532 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 SLC on time in August 2023?

82.6% of 9,621 scheduled domestic departures left less than 15 minutes late, and 83.2% 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 SLC · methodology · corrections.