Salt Lake City International in June 2025

80.9%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 June 2025, reporting carriers scheduled 9,995 domestic departures from Salt Lake City International (SLC). 80.9% left less than 15 minutes late and 80.5% reached their destination on time; 0.5% were cancelled.

Nationally that month, 71.4% of flights departed on time and 70.3% arrived on time, so SLC departures were 9.5 points above the national departure figure.

A year earlier, in June 2024, the airport had 9,610 departures with 79.2% leaving on time: a change of +1.7 points, with flights up 4%.

Flights arriving at SLC that month were on time 81.9% of the time (9,968 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 47%, late-arriving aircraft 29% and national aviation system 20%.

On time 80.5%
Arrived 15+ minutes late 18.7%
Cancelled 0.5%
Diverted 0.4%

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

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

Measure	Jun 2025	Jun 2024	SLC, 12 months to Jul 2026	All reported flights, Jun 2025
Departed on time	80.9%	79.2%	84.0%	71.4%
Arrived on time	80.5%	79.6%	83.8%	70.3%
Cancelled	0.5%	0.3%	0.8%	1.6%
Average departure delay (late minutes only)	13.2 min	16.0 min	11.0 min	22.1 min
Scheduled departures a day	333	320	323	20,386
Scheduled departures	9,995	9,610	117,896	611,575

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
DL Delta Air Lines	4,663	47%	78.2%	6.8 min	0.5%
OO SkyWest Airlines	3,100	31%	92.0%	-5.7 min	0.0%
WN Southwest Airlines	992	10%	71.3%	12.5 min	0.5%
AA American Airlines	386	4%	67.4%	20.3 min	2.6%
UA United Airlines	381	4%	72.2%	13.6 min	1.0%
F9 Frontier Airlines	204	2%	65.2%	20.1 min	1.5%
AS Alaska Airlines	112	1%	50.0%	17.5 min	0.9%
B6 JetBlue Airways	49	0%	59.2%	21.1 min	2.0%
NK Spirit Airlines	43	0%	65.1%	28.0 min	0.0%
MQ Envoy Air	35	0%	88.6%	-4.3 min	0.0%
HA Hawaiian Airlines	30	0%	83.3%	43.9 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SLC–DEN	Salt Lake City to Denver	664	64.9%	19.6 min	0.3%
SLC–PHX	Salt Lake City to Phoenix	428	80.1%	11.0 min	0.7%
SLC–SEA	Salt Lake City to Seattle	373	66.5%	8.9 min	0.5%
SLC–DFW	Salt Lake City to Dallas/Fort Worth	319	68.0%	13.9 min	2.2%
SLC–LAS	Salt Lake City to Las Vegas	306	71.6%	13.1 min	0.0%
SLC–SFO	Salt Lake City to San Francisco	306	77.8%	4.7 min	0.3%
SLC–LAX	Salt Lake City to Los Angeles	298	83.9%	-0.6 min	0.7%
SLC–ORD	Salt Lake City to Chicago	266	73.7%	16.8 min	0.0%
SLC–ATL	Salt Lake City to Atlanta	241	72.2%	11.0 min	0.8%
SLC–PDX	Salt Lake City to Portland	232	85.3%	-0.1 min	1.3%
SLC–SAN	Salt Lake City to San Diego	215	80.9%	5.6 min	0.0%
SLC–SMF	Salt Lake City to Sacramento	197	89.3%	-1.6 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), June 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Jun 2025	Minutes
Air carrier	47.4%	31.6%	57,517
Late-arriving aircraft	29.2%	40.6%	35,450
National Aviation System	20.3%	20.9%	24,646
Extreme weather	3.0%	6.9%	3,627
Security	0.0%	0.2%	0

121,240 delay minutes on 1,866 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 June 2025?

80.9% of 9,995 scheduled domestic departures left less than 15 minutes late, and 80.5% reached their destination on time. The national figures that month were 71.4% and 70.3%.

How does that compare with a year earlier?

In June 2024, 79.2% of 9,610 departures left on time and 0.3% were cancelled, against 80.9% and 0.5% in June 2025.

Provenance

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