Salt Lake City International in January 2025

84.3%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 January 2025, reporting carriers scheduled 9,350 domestic departures from Salt Lake City International (SLC). 84.3% left less than 15 minutes late and 84.7% reached their destination on time; 0.8% were cancelled.

Nationally that month, 79.3% of flights departed on time and 78.6% arrived on time, so SLC departures were 5.0 points above the national departure figure.

A year earlier, in January 2024, the airport had 9,459 departures with 78.7% leaving on time: a change of +5.6 points, with flights down 1%.

Flights arriving at SLC that month were on time 84.9% of the time (9,347 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 48%, late-arriving aircraft 21% and national aviation system 17%.

On time 84.7%
Arrived 15+ minutes late 14.2%
Cancelled 0.8%
Diverted 0.3%

Every scheduled departure from SLC in January 2025, judged by arrival at the destination.

January 2025 against a year earlier, the airport's year and the nation

Measure	Jan 2025	Jan 2024	SLC, 12 months to Jul 2026	All reported flights, Jan 2025
Departed on time	84.3%	78.7%	84.0%	79.3%
Arrived on time	84.7%	76.0%	83.8%	78.6%
Cancelled	0.8%	1.1%	0.8%	3.0%
Average departure delay (late minutes only)	11.0 min	17.0 min	11.0 min	14.0 min
Scheduled departures a day	312	315	323	17,992
Scheduled departures	9,350	9,459	117,896	539,747

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
DL Delta Air Lines	4,455	48%	84.5%	-2.3 min	0.9%
OO SkyWest Airlines	2,685	29%	88.0%	-5.7 min	0.5%
WN Southwest Airlines	962	10%	82.7%	-1.9 min	0.5%
UA United Airlines	451	5%	83.6%	-2.8 min	1.3%
AA American Airlines	320	3%	78.4%	5.6 min	3.1%
F9 Frontier Airlines	234	3%	77.8%	2.1 min	0.9%
AS Alaska Airlines	102	1%	68.6%	11.1 min	0.0%
NK Spirit Airlines	44	0%	86.4%	-3.5 min	0.0%
B6 JetBlue Airways	43	0%	81.4%	-4.1 min	2.3%
HA Hawaiian Airlines	31	0%	80.6%	13.7 min	0.0%
MQ Envoy Air	23	0%	87.0%	-10.0 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SLC–DEN	Salt Lake City to Denver	648	77.3%	4.7 min	0.2%
SLC–PHX	Salt Lake City to Phoenix	491	87.6%	-7.2 min	0.4%
SLC–LAX	Salt Lake City to Los Angeles	400	86.5%	-7.3 min	0.0%
SLC–LAS	Salt Lake City to Las Vegas	338	81.7%	0.3 min	0.3%
SLC–DFW	Salt Lake City to Dallas/Fort Worth	320	74.1%	10.2 min	4.4%
SLC–SEA	Salt Lake City to Seattle	319	82.4%	-3.4 min	0.0%
SLC–SFO	Salt Lake City to San Francisco	297	87.5%	-8.0 min	0.0%
SLC–ATL	Salt Lake City to Atlanta	251	86.5%	-4.6 min	3.2%
SLC–ORD	Salt Lake City to Chicago	241	81.7%	4.5 min	0.0%
SLC–SAN	Salt Lake City to San Diego	209	84.7%	-1.6 min	0.0%
SLC–PDX	Salt Lake City to Portland	187	82.9%	0.4 min	0.0%
SLC–IAH	Salt Lake City to Houston	179	80.4%	-2.9 min	4.5%

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), January 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Jan 2025	Minutes
Air carrier	48.0%	36.2%	41,603
Late-arriving aircraft	20.9%	34.7%	18,128
National Aviation System	17.4%	19.9%	15,048
Extreme weather	13.6%	9.1%	11,784
Security	0.0%	0.2%	42

86,605 delay minutes on 1,326 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 January 2025?

84.3% of 9,350 scheduled domestic departures left less than 15 minutes late, and 84.7% reached their destination on time. The national figures that month were 79.3% and 78.6%.

How does that compare with a year earlier?

In January 2024, 78.7% of 9,459 departures left on time and 1.1% were cancelled, against 84.3% and 0.8% in January 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for January 2025; 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.