Salt Lake City International in March 2025

84.7%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 March 2025, reporting carriers scheduled 10,276 domestic departures from Salt Lake City International (SLC). 84.7% left less than 15 minutes late and 83.9% reached their destination on time; 0.2% were cancelled.

Nationally that month, 79.9% of flights departed on time and 79.3% arrived on time, so SLC departures were 4.8 points above the national departure figure.

A year earlier, in March 2024, the airport had 9,721 departures with 83.3% leaving on time: a change of +1.4 points, with flights up 6%.

Flights arriving at SLC that month were on time 85.4% of the time (10,273 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 52%, late-arriving aircraft 24% and national aviation system 21%.

On time 83.9%
Arrived 15+ minutes late 15.6%
Cancelled 0.2%
Diverted 0.3%

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

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

Measure	Mar 2025	Mar 2024	SLC, 12 months to Jul 2026	All reported flights, Mar 2025
Departed on time	84.7%	83.3%	84.0%	79.9%
Arrived on time	83.9%	81.7%	83.8%	79.3%
Cancelled	0.2%	0.4%	0.8%	1.2%
Average departure delay (late minutes only)	10.7 min	12.5 min	11.0 min	14.9 min
Scheduled departures a day	343	324	323	20,029
Scheduled departures	10,276	9,721	117,896	600,872

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
DL Delta Air Lines	4,820	47%	84.3%	-0.7 min	0.1%
OO SkyWest Airlines	2,965	29%	88.1%	-1.0 min	0.2%
WN Southwest Airlines	1,070	10%	77.1%	5.3 min	0.1%
UA United Airlines	475	5%	79.8%	5.7 min	0.4%
AA American Airlines	391	4%	78.0%	9.8 min	1.5%
F9 Frontier Airlines	269	3%	83.3%	2.9 min	0.4%
B6 JetBlue Airways	118	1%	73.7%	24.0 min	0.8%
AS Alaska Airlines	77	1%	63.6%	12.2 min	0.0%
MQ Envoy Air	33	0%	93.9%	-5.9 min	0.0%
HA Hawaiian Airlines	32	0%	65.6%	64.0 min	3.1%
NK Spirit Airlines	26	0%	96.2%	-12.3 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SLC–DEN	Salt Lake City to Denver	673	79.6%	3.6 min	0.3%
SLC–PHX	Salt Lake City to Phoenix	595	81.0%	4.2 min	0.0%
SLC–LAX	Salt Lake City to Los Angeles	413	89.8%	-5.1 min	0.0%
SLC–DFW	Salt Lake City to Dallas/Fort Worth	359	76.0%	13.9 min	1.1%
SLC–ORD	Salt Lake City to Chicago	322	79.2%	9.9 min	0.0%
SLC–LAS	Salt Lake City to Las Vegas	321	76.6%	3.7 min	0.0%
SLC–SFO	Salt Lake City to San Francisco	320	71.9%	14.4 min	0.3%
SLC–SEA	Salt Lake City to Seattle	306	82.0%	-0.5 min	0.3%
SLC–ATL	Salt Lake City to Atlanta	250	84.0%	-0.8 min	0.0%
SLC–SAN	Salt Lake City to San Diego	235	82.6%	0.1 min	0.0%
SLC–JFK	Salt Lake City to New York	215	76.7%	12.8 min	0.5%
SLC–IAH	Salt Lake City to Houston	207	84.5%	-0.4 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), March 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Mar 2025	Minutes
Air carrier	52.0%	33.0%	52,877
Late-arriving aircraft	24.1%	39.2%	24,552
National Aviation System	20.6%	21.9%	20,942
Extreme weather	3.3%	5.9%	3,311
Security	0.0%	0.1%	0

101,682 delay minutes on 1,604 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 March 2025?

84.7% of 10,276 scheduled domestic departures left less than 15 minutes late, and 83.9% reached their destination on time. The national figures that month were 79.9% and 79.3%.

How does that compare with a year earlier?

In March 2024, 83.3% of 9,721 departures left on time and 0.4% were cancelled, against 84.7% and 0.2% in March 2025.

Provenance

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