Salt Lake City International in December 2024

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 December 2024, reporting carriers scheduled 9,496 domestic departures from Salt Lake City International (SLC). 82.6% left less than 15 minutes late and 82.0% reached their destination on time; 0.3% were cancelled.

Nationally that month, 77.8% of flights departed on time and 78.1% arrived on time, so SLC departures were 4.8 points above the national departure figure.

A year earlier, in December 2023, the airport had 9,301 departures with 89.2% leaving on time: a change of −6.6 points, with flights up 2%.

Flights arriving at SLC that month were on time 83.4% of the time (9,498 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 44%, late-arriving aircraft 26% and national aviation system 18%.

On time 82.0%
Arrived 15+ minutes late 17.5%
Cancelled 0.3%
Diverted 0.3%

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

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

Measure	Dec 2024	Dec 2023	SLC, 12 months to Jul 2026	All reported flights, Dec 2024
Departed on time	82.6%	89.2%	84.0%	77.8%
Arrived on time	82.0%	87.5%	83.8%	78.1%
Cancelled	0.3%	0.1%	0.8%	0.7%
Average departure delay (late minutes only)	13.1 min	9.1 min	11.0 min	16.6 min
Scheduled departures a day	317	310	323	19,686
Scheduled departures	9,496	9,301	117,896	590,581

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
DL Delta Air Lines	4,633	49%	80.9%	3.3 min	0.0%
OO SkyWest Airlines	2,780	29%	86.0%	-2.7 min	0.4%
WN Southwest Airlines	956	10%	79.2%	5.0 min	0.1%
UA United Airlines	346	4%	81.5%	1.2 min	0.6%
AA American Airlines	299	3%	77.9%	8.9 min	2.3%
F9 Frontier Airlines	239	3%	79.5%	3.8 min	0.0%
AS Alaska Airlines	70	1%	84.3%	0.1 min	0.0%
B6 JetBlue Airways	57	1%	61.4%	16.0 min	1.8%
MQ Envoy Air	47	0%	91.5%	-18.3 min	0.0%
NK Spirit Airlines	38	0%	92.1%	-3.3 min	0.0%
HA Hawaiian Airlines	31	0%	32.3%	28.2 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SLC–DEN	Salt Lake City to Denver	641	82.7%	0.8 min	0.0%
SLC–PHX	Salt Lake City to Phoenix	541	84.3%	-0.6 min	0.0%
SLC–LAS	Salt Lake City to Las Vegas	338	84.3%	-1.0 min	0.0%
SLC–DFW	Salt Lake City to Dallas/Fort Worth	323	75.2%	11.8 min	1.9%
SLC–LAX	Salt Lake City to Los Angeles	315	84.1%	-2.3 min	0.0%
SLC–SFO	Salt Lake City to San Francisco	307	74.3%	5.5 min	0.0%
SLC–SEA	Salt Lake City to Seattle	304	87.8%	-5.4 min	0.0%
SLC–ORD	Salt Lake City to Chicago	259	80.7%	6.5 min	0.0%
SLC–ATL	Salt Lake City to Atlanta	249	86.3%	-2.3 min	0.0%
SLC–SAN	Salt Lake City to San Diego	229	73.4%	16.7 min	0.9%
SLC–PDX	Salt Lake City to Portland	213	80.8%	1.8 min	0.0%
SLC–JFK	Salt Lake City to New York	176	72.7%	8.1 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), December 2024.

Delay causes

BTS cause category	Share of delay minutes	National, Dec 2024	Minutes
Air carrier	44.1%	34.3%	48,209
Late-arriving aircraft	25.8%	40.2%	28,181
National Aviation System	17.6%	17.8%	19,274
Extreme weather	12.5%	7.5%	13,707
Security	0.0%	0.2%	14

109,385 delay minutes on 1,658 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 2024?

82.6% of 9,496 scheduled domestic departures left less than 15 minutes late, and 82.0% reached their destination on time. The national figures that month were 77.8% and 78.1%.

How does that compare with a year earlier?

In December 2023, 89.2% of 9,301 departures left on time and 0.1% were cancelled, against 82.6% and 0.3% in December 2024.

Provenance

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