Salt Lake City International in December 2023

89.2%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 2023, reporting carriers scheduled 9,301 domestic departures from Salt Lake City International (SLC). 89.2% left less than 15 minutes late and 87.5% reached their destination on time; 0.1% were cancelled.

Nationally that month, 83.1% of flights departed on time and 83.8% arrived on time, so SLC departures were 6.1 points above the national departure figure.

Flights arriving at SLC that month were on time 89.9% of the time (9,319 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 37%, extreme weather 26% and national aviation system 19%.

On time 87.5%
Arrived 15+ minutes late 11.9%
Cancelled 0.1%
Diverted 0.4%

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

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

Measure	Dec 2023	Year earlier	SLC, 12 months to Jul 2026	All reported flights, Dec 2023
Departed on time	89.2%	—	84.0%	83.1%
Arrived on time	87.5%	—	83.8%	83.8%
Cancelled	0.1%	—	0.8%	0.4%
Average departure delay (late minutes only)	9.1 min	—	11.0 min	11.6 min
Scheduled departures a day	310	—	323	19,013
Scheduled departures	9,301	—	117,896	570,394

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
DL Delta Air Lines	4,404	47%	89.7%	-5.2 min	0.0%
OO SkyWest Airlines	2,700	29%	88.7%	-2.1 min	0.2%
WN Southwest Airlines	1,048	11%	83.4%	-1.9 min	0.6%
UA United Airlines	312	3%	86.2%	-1.5 min	0.3%
AA American Airlines	310	3%	81.0%	2.7 min	0.0%
B6 JetBlue Airways	158	2%	63.3%	24.6 min	0.0%
F9 Frontier Airlines	157	2%	80.3%	1.0 min	0.6%
NK Spirit Airlines	111	1%	83.8%	-1.8 min	0.0%
AS Alaska Airlines	91	1%	81.3%	4.0 min	0.0%
MQ Envoy Air	10	0%	80.0%	4.9 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SLC–DEN	Salt Lake City to Denver	651	84.2%	-1.0 min	0.5%
SLC–PHX	Salt Lake City to Phoenix	528	85.0%	-4.2 min	0.4%
SLC–LAX	Salt Lake City to Los Angeles	367	86.4%	-3.5 min	0.0%
SLC–LAS	Salt Lake City to Las Vegas	348	82.2%	1.9 min	0.0%
SLC–DFW	Salt Lake City to Dallas/Fort Worth	337	89.3%	-2.8 min	0.0%
SLC–SFO	Salt Lake City to San Francisco	320	77.8%	4.2 min	0.3%
SLC–SEA	Salt Lake City to Seattle	273	89.7%	-8.4 min	0.0%
SLC–ATL	Salt Lake City to Atlanta	240	95.0%	-10.3 min	0.0%
SLC–ORD	Salt Lake City to Chicago	228	86.8%	-5.5 min	0.0%
SLC–SAN	Salt Lake City to San Diego	207	91.3%	-8.7 min	0.0%
SLC–MCO	Salt Lake City to Orlando	190	86.3%	-4.3 min	0.0%
SLC–OAK	Salt Lake City to Oakland	183	91.3%	-5.3 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), December 2023.

Delay causes

BTS cause category	Share of delay minutes	National, Dec 2023	Minutes
Air carrier	36.6%	37.1%	27,919
Late-arriving aircraft	18.6%	38.8%	14,183
National Aviation System	18.9%	17.6%	14,432
Extreme weather	25.7%	6.2%	19,610
Security	0.1%	0.3%	70

76,214 delay minutes on 1,110 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 December 2023?

89.2% of 9,301 scheduled domestic departures left less than 15 minutes late, and 87.5% reached their destination on time. The national figures that month were 83.1% and 83.8%.

How does that compare with a year earlier?

December 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 December 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.