Salt Lake City International in September 2023

86.7%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 September 2023, reporting carriers scheduled 9,166 domestic departures from Salt Lake City International (SLC). 86.7% left less than 15 minutes late and 86.4% reached their destination on time; 0.3% were cancelled.

Nationally that month, 80.5% of flights departed on time and 80.1% arrived on time, so SLC departures were 6.2 points above the national departure figure.

Flights arriving at SLC that month were on time 87.4% of the time (9,166 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 55%, late-arriving aircraft 25% and national aviation system 15%.

On time 86.4%
Arrived 15+ minutes late 13.0%
Cancelled 0.3%
Diverted 0.3%

Every scheduled departure from SLC in September 2023, judged by arrival at the destination.

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

Measure	Sep 2023	Year earlier	SLC, 12 months to Jul 2026	All reported flights, Sep 2023
Departed on time	86.7%	—	84.0%	80.5%
Arrived on time	86.4%	—	83.8%	80.1%
Cancelled	0.3%	—	0.8%	1.2%
Average departure delay (late minutes only)	9.8 min	—	11.0 min	14.1 min
Scheduled departures a day	306	—	323	18,978
Scheduled departures	9,166	—	117,896	569,338

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
DL Delta Air Lines	4,311	47%	85.6%	1.0 min	0.3%
OO SkyWest Airlines	2,678	29%	93.1%	-4.3 min	0.0%
WN Southwest Airlines	999	11%	81.2%	4.1 min	0.3%
UA United Airlines	308	3%	83.1%	2.4 min	1.6%
AA American Airlines	284	3%	81.7%	0.0 min	0.4%
B6 JetBlue Airways	178	2%	66.3%	20.4 min	1.1%
F9 Frontier Airlines	173	2%	78.6%	12.1 min	0.6%
NK Spirit Airlines	123	1%	74.0%	15.8 min	0.8%
AS Alaska Airlines	112	1%	80.4%	1.1 min	0.9%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SLC–DEN	Salt Lake City to Denver	635	79.8%	8.3 min	0.2%
SLC–PHX	Salt Lake City to Phoenix	411	87.6%	0.1 min	0.0%
SLC–LAS	Salt Lake City to Las Vegas	403	74.4%	16.0 min	0.7%
SLC–SEA	Salt Lake City to Seattle	352	85.2%	-1.8 min	0.3%
SLC–LAX	Salt Lake City to Los Angeles	349	84.8%	4.2 min	0.3%
SLC–DFW	Salt Lake City to Dallas/Fort Worth	290	83.1%	2.5 min	0.3%
SLC–SFO	Salt Lake City to San Francisco	287	76.7%	7.3 min	1.4%
SLC–ATL	Salt Lake City to Atlanta	260	88.8%	-2.8 min	0.0%
SLC–ORD	Salt Lake City to Chicago	224	87.5%	6.7 min	0.0%
SLC–PDX	Salt Lake City to Portland	174	88.5%	-2.2 min	0.0%
SLC–SMF	Salt Lake City to Sacramento	174	90.2%	-2.6 min	0.0%
SLC–SAN	Salt Lake City to San Diego	173	83.8%	7.5 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), September 2023.

Delay causes

BTS cause category	Share of delay minutes	National, Sep 2023	Minutes
Air carrier	55.4%	36.4%	44,087
Late-arriving aircraft	25.0%	38.3%	19,860
National Aviation System	15.0%	19.9%	11,968
Extreme weather	3.5%	5.1%	2,764
Security	1.1%	0.2%	872

79,551 delay minutes on 1,193 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 2023?

86.7% of 9,166 scheduled domestic departures left less than 15 minutes late, and 86.4% reached their destination on time. The national figures that month were 80.5% and 80.1%.

How does that compare with a year earlier?

September 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 September 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.