Salt Lake City International in July 2025

80.1%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 July 2025, reporting carriers scheduled 10,346 domestic departures from Salt Lake City International (SLC). 80.1% left less than 15 minutes late and 78.6% reached their destination on time; 0.7% were cancelled.

Nationally that month, 69.7% of flights departed on time and 69.0% arrived on time, so SLC departures were 10.4 points above the national departure figure.

A year earlier, in July 2024, the airport had 9,946 departures with 74.1% leaving on time: a change of +6.0 points, with flights up 4%.

Flights arriving at SLC that month were on time 80.4% of the time (10,315 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 48%, late-arriving aircraft 30% and national aviation system 19%.

On time 78.6%
Arrived 15+ minutes late 20.3%
Cancelled 0.7%
Diverted 0.5%

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

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

Measure	Jul 2025	Jul 2024	SLC, 12 months to Jul 2026	All reported flights, Jul 2025
Departed on time	80.1%	74.1%	84.0%	69.7%
Arrived on time	78.6%	74.0%	83.8%	69.0%
Cancelled	0.7%	3.3%	0.8%	2.5%
Average departure delay (late minutes only)	15.1 min	19.9 min	11.0 min	24.3 min
Scheduled departures a day	345	332	323	21,048
Scheduled departures	10,346	9,946	117,896	631,428

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
DL Delta Air Lines	4,779	46%	76.6%	9.1 min	0.5%
OO SkyWest Airlines	3,235	31%	89.6%	-2.2 min	0.2%
WN Southwest Airlines	1,026	10%	70.0%	15.7 min	0.8%
AA American Airlines	406	4%	66.3%	29.8 min	3.7%
UA United Airlines	388	4%	63.9%	21.0 min	0.5%
F9 Frontier Airlines	212	2%	64.2%	33.5 min	3.8%
AS Alaska Airlines	130	1%	60.0%	13.1 min	2.3%
B6 JetBlue Airways	62	1%	61.3%	45.1 min	6.5%
NK Spirit Airlines	43	0%	69.8%	26.6 min	0.0%
MQ Envoy Air	34	0%	73.5%	4.6 min	2.9%
HA Hawaiian Airlines	31	0%	87.1%	7.5 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SLC–DEN	Salt Lake City to Denver	688	62.5%	24.2 min	1.0%
SLC–PHX	Salt Lake City to Phoenix	431	78.4%	13.4 min	1.2%
SLC–SEA	Salt Lake City to Seattle	394	73.4%	8.5 min	1.0%
SLC–DFW	Salt Lake City to Dallas/Fort Worth	330	66.7%	23.5 min	3.3%
SLC–SFO	Salt Lake City to San Francisco	314	76.1%	6.9 min	0.6%
SLC–LAS	Salt Lake City to Las Vegas	299	71.9%	16.6 min	0.3%
SLC–LAX	Salt Lake City to Los Angeles	291	78.7%	5.4 min	0.7%
SLC–ORD	Salt Lake City to Chicago	269	65.4%	31.2 min	0.4%
SLC–ATL	Salt Lake City to Atlanta	249	80.7%	1.6 min	0.4%
SLC–PDX	Salt Lake City to Portland	247	79.4%	10.0 min	0.4%
SLC–SAN	Salt Lake City to San Diego	221	82.4%	4.4 min	0.0%
SLC–SMF	Salt Lake City to Sacramento	204	84.8%	2.6 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), July 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Jul 2025	Minutes
Air carrier	47.6%	31.1%	68,932
Late-arriving aircraft	29.6%	40.8%	42,880
National Aviation System	18.8%	20.7%	27,211
Extreme weather	4.1%	7.3%	5,905
Security	0.0%	0.1%	0

144,928 delay minutes on 2,099 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 July 2025?

80.1% of 10,346 scheduled domestic departures left less than 15 minutes late, and 78.6% reached their destination on time. The national figures that month were 69.7% and 69.0%.

How does that compare with a year earlier?

In July 2024, 74.1% of 9,946 departures left on time and 3.3% were cancelled, against 80.1% and 0.7% in July 2025.

Provenance

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