Salt Lake City International in October 2025

86.7%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 October 2025, reporting carriers scheduled 9,841 domestic departures from Salt Lake City International (SLC). 86.7% left less than 15 minutes late and 85.5% reached their destination on time; 0.1% were cancelled.

Nationally that month, 80.0% of flights departed on time and 79.1% arrived on time, so SLC departures were 6.7 points above the national departure figure.

A year earlier, in October 2024, the airport had 9,446 departures with 89.1% leaving on time: a change of −2.4 points, with flights up 4%.

Flights arriving at SLC that month were on time 86.6% of the time (9,807 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 48%, late-arriving aircraft 28% and national aviation system 21%.

On time 85.5%
Arrived 15+ minutes late 14.3%
Cancelled 0.1%
Diverted 0.2%

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

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

Measure	Oct 2025	Oct 2024	SLC, 12 months to Jul 2026	All reported flights, Oct 2025
Departed on time	86.7%	89.1%	84.0%	80.0%
Arrived on time	85.5%	88.9%	83.8%	79.1%
Cancelled	0.1%	0.2%	0.8%	0.5%
Average departure delay (late minutes only)	9.3 min	7.7 min	11.0 min	13.9 min
Scheduled departures a day	328	315	323	20,195
Scheduled departures	9,841	9,446	117,896	605,844

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
DL Delta Air Lines	4,547	46%	83.9%	1.8 min	0.0%
OO SkyWest Airlines	3,070	31%	92.2%	-5.1 min	0.0%
WN Southwest Airlines	968	10%	77.5%	5.7 min	0.0%
UA United Airlines	376	4%	82.2%	2.2 min	0.5%
AA American Airlines	367	4%	79.0%	12.3 min	0.5%
F9 Frontier Airlines	322	3%	80.7%	8.4 min	0.3%
AS Alaska Airlines	118	1%	79.7%	3.2 min	3.4%
B6 JetBlue Airways	31	0%	80.6%	-2.5 min	0.0%
HA Hawaiian Airlines	31	0%	80.6%	2.0 min	0.0%
NK Spirit Airlines	7	0%	71.4%	12.1 min	0.0%
MQ Envoy Air	4	0%	100.0%	-13.2 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SLC–DEN	Salt Lake City to Denver	662	79.6%	4.0 min	0.0%
SLC–PHX	Salt Lake City to Phoenix	476	79.4%	4.7 min	0.0%
SLC–SEA	Salt Lake City to Seattle	367	78.5%	4.0 min	1.4%
SLC–LAX	Salt Lake City to Los Angeles	349	85.7%	0.4 min	0.0%
SLC–DFW	Salt Lake City to Dallas/Fort Worth	323	78.6%	9.6 min	0.6%
SLC–LAS	Salt Lake City to Las Vegas	320	80.0%	12.8 min	0.0%
SLC–SFO	Salt Lake City to San Francisco	283	70.3%	11.7 min	0.0%
SLC–ORD	Salt Lake City to Chicago	265	79.2%	12.8 min	0.4%
SLC–ATL	Salt Lake City to Atlanta	253	92.1%	-2.9 min	0.0%
SLC–SAN	Salt Lake City to San Diego	238	79.8%	4.4 min	0.0%
SLC–PDX	Salt Lake City to Portland	211	90.0%	-3.5 min	0.0%
SLC–SMF	Salt Lake City to Sacramento	191	80.1%	4.5 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), October 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Oct 2025	Minutes
Air carrier	47.7%	34.0%	40,108
Late-arriving aircraft	27.7%	39.7%	23,288
National Aviation System	20.5%	22.9%	17,200
Extreme weather	4.1%	3.3%	3,438
Security	0.0%	0.1%	5

84,039 delay minutes on 1,403 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 October 2025?

86.7% of 9,841 scheduled domestic departures left less than 15 minutes late, and 85.5% reached their destination on time. The national figures that month were 80.0% and 79.1%.

How does that compare with a year earlier?

In October 2024, 89.1% of 9,446 departures left on time and 0.2% were cancelled, against 86.7% and 0.1% in October 2025.

Provenance

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