Salt Lake City International in April 2026

85.8%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 April 2026, reporting carriers scheduled 9,877 domestic departures from Salt Lake City International (SLC). 85.8% left less than 15 minutes late and 83.8% reached their destination on time; 0.4% were cancelled.

Nationally that month, 79.1% of flights departed on time and 78.9% arrived on time, so SLC departures were 6.7 points above the national departure figure.

A year earlier, in April 2025, the airport had 9,515 departures with 86.4% leaving on time: a change of −0.6 points, with flights up 4%.

Flights arriving at SLC that month were on time 85.9% of the time (9,876 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 48%, late-arriving aircraft 25% and national aviation system 23%.

On time 83.8%
Arrived 15+ minutes late 15.5%
Cancelled 0.4%
Diverted 0.3%

Every scheduled departure from SLC in April 2026, judged by arrival at the destination.

April 2026 against a year earlier, the airport's year and the nation

Measure	Apr 2026	Apr 2025	SLC, 12 months to Jul 2026	All reported flights, Apr 2026
Departed on time	85.8%	86.4%	84.0%	79.1%
Arrived on time	83.8%	84.2%	83.8%	78.9%
Cancelled	0.4%	0.2%	0.8%	0.9%
Average departure delay (late minutes only)	9.8 min	9.3 min	11.0 min	14.5 min
Scheduled departures a day	329	317	323	19,931
Scheduled departures	9,877	9,515	117,896	597,919

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
DL Delta Air Lines	4,616	47%	84.5%	0.6 min	0.3%
OO SkyWest Airlines	3,093	31%	87.1%	-1.2 min	0.2%
WN Southwest Airlines	906	9%	73.5%	4.5 min	0.4%
AA American Airlines	384	4%	80.2%	6.3 min	1.8%
F9 Frontier Airlines	363	4%	79.9%	9.1 min	1.4%
UA United Airlines	351	4%	83.2%	0.3 min	0.3%
AS Alaska Airlines	134	1%	78.4%	-0.2 min	0.7%
B6 JetBlue Airways	30	0%	86.7%	-3.9 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SLC–DEN	Salt Lake City to Denver	640	80.2%	-0.1 min	0.0%
SLC–PHX	Salt Lake City to Phoenix	522	83.1%	6.0 min	0.6%
SLC–LAX	Salt Lake City to Los Angeles	342	85.1%	-2.5 min	0.0%
SLC–LAS	Salt Lake City to Las Vegas	338	76.0%	5.4 min	0.0%
SLC–DFW	Salt Lake City to Dallas/Fort Worth	320	78.4%	10.9 min	1.3%
SLC–SEA	Salt Lake City to Seattle	315	88.9%	-6.7 min	0.3%
SLC–SFO	Salt Lake City to San Francisco	294	49.0%	31.3 min	1.4%
SLC–SAN	Salt Lake City to San Diego	272	84.2%	0.0 min	0.0%
SLC–ORD	Salt Lake City to Chicago	267	73.4%	8.7 min	1.5%
SLC–ATL	Salt Lake City to Atlanta	251	86.9%	2.0 min	0.0%
SLC–PDX	Salt Lake City to Portland	186	88.7%	-5.7 min	1.6%
SLC–SMF	Salt Lake City to Sacramento	173	86.7%	-4.1 min	1.2%

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), April 2026.

Delay causes

BTS cause category	Share of delay minutes	National, Apr 2026	Minutes
Air carrier	47.7%	33.5%	43,875
Late-arriving aircraft	25.2%	40.4%	23,145
National Aviation System	23.1%	21.0%	21,272
Extreme weather	3.9%	5.0%	3,627
Security	0.0%	0.1%	43

91,962 delay minutes on 1,534 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 April 2026?

85.8% of 9,877 scheduled domestic departures left less than 15 minutes late, and 83.8% reached their destination on time. The national figures that month were 79.1% and 78.9%.

How does that compare with a year earlier?

In April 2025, 86.4% of 9,515 departures left on time and 0.2% were cancelled, against 85.8% and 0.4% in April 2026.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for April 2026; 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.