Salt Lake City International in September 2024

87.0%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 September 2024, reporting carriers scheduled 9,281 domestic departures from Salt Lake City International (SLC). 87.0% left less than 15 minutes late and 86.4% reached their destination on time; 0.1% were cancelled.

Nationally that month, 84.4% of flights departed on time and 83.9% arrived on time, so SLC departures were 2.6 points above the national departure figure.

A year earlier, in September 2023, the airport had 9,166 departures with 86.7% leaving on time: a change of +0.3 points, with flights up 1%.

Flights arriving at SLC that month were on time 88.9% of the time (9,278 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 55%, late-arriving aircraft 23% and national aviation system 14%.

On time 86.4%
Arrived 15+ minutes late 13.3%
Cancelled 0.1%
Diverted 0.2%

Every scheduled departure from SLC in September 2024, judged by arrival at the destination.

September 2024 against a year earlier, the airport's year and the nation

Measure	Sep 2024	Sep 2023	SLC, 12 months to Jul 2026	All reported flights, Sep 2024
Departed on time	87.0%	86.7%	84.0%	84.4%
Arrived on time	86.4%	86.4%	83.8%	83.9%
Cancelled	0.1%	0.3%	0.8%	0.6%
Average departure delay (late minutes only)	9.1 min	9.8 min	11.0 min	10.6 min
Scheduled departures a day	309	306	323	19,421
Scheduled departures	9,281	9,166	117,896	582,622

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
DL Delta Air Lines	4,506	49%	84.9%	1.7 min	0.1%
OO SkyWest Airlines	2,515	27%	91.4%	-3.7 min	0.0%
WN Southwest Airlines	959	10%	84.7%	1.3 min	0.2%
UA United Airlines	340	4%	90.0%	-3.8 min	0.6%
AA American Airlines	306	3%	84.0%	7.0 min	0.3%
F9 Frontier Airlines	305	3%	76.7%	6.7 min	1.3%
AS Alaska Airlines	139	1%	81.3%	0.3 min	0.0%
NK Spirit Airlines	91	1%	76.9%	6.3 min	0.0%
B6 JetBlue Airways	90	1%	83.3%	7.4 min	0.0%
HA Hawaiian Airlines	30	0%	86.7%	-3.5 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SLC–DEN	Salt Lake City to Denver	648	87.0%	-1.7 min	0.2%
SLC–PHX	Salt Lake City to Phoenix	465	89.9%	-0.4 min	0.2%
SLC–LAS	Salt Lake City to Las Vegas	371	75.5%	8.8 min	0.5%
SLC–SEA	Salt Lake City to Seattle	367	84.7%	0.7 min	0.0%
SLC–DFW	Salt Lake City to Dallas/Fort Worth	322	81.4%	5.2 min	0.0%
SLC–LAX	Salt Lake City to Los Angeles	316	88.0%	-2.8 min	0.0%
SLC–SFO	Salt Lake City to San Francisco	275	81.1%	0.4 min	0.0%
SLC–ORD	Salt Lake City to Chicago	257	89.1%	-0.3 min	0.4%
SLC–ATL	Salt Lake City to Atlanta	243	84.0%	2.0 min	0.0%
SLC–PDX	Salt Lake City to Portland	216	91.7%	-3.1 min	0.5%
SLC–SAN	Salt Lake City to San Diego	203	73.9%	7.9 min	0.0%
SLC–IAH	Salt Lake City to Houston	173	87.3%	1.5 min	0.6%

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), September 2024.

Delay causes

BTS cause category	Share of delay minutes	National, Sep 2024	Minutes
Air carrier	55.4%	38.6%	41,889
Late-arriving aircraft	23.2%	38.4%	17,590
National Aviation System	14.0%	18.2%	10,560
Extreme weather	7.4%	4.8%	5,584
Security	0.1%	0.1%	40

75,663 delay minutes on 1,234 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 September 2024?

87.0% of 9,281 scheduled domestic departures left less than 15 minutes late, and 86.4% reached their destination on time. The national figures that month were 84.4% and 83.9%.

How does that compare with a year earlier?

In September 2023, 86.7% of 9,166 departures left on time and 0.3% were cancelled, against 87.0% and 0.1% in September 2024.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for September 2024; 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.