FlightRecord

Salt Lake City International Airport (SLC): Delays & On-Time Performance

Data through May 2026

Salt Lake City International Airport (SLC) runs noticeably smoother than most US airports: 84% of its ~323 daily departures leave on time, 6 points above the national average, with an average departure delay of just 12 minutes. 11 airlines fly from Salt Lake City, UT to 98 destinations.

Departures on-time
84%
left <15 min late
Avg dep delay
12 min
Arrivals on-time
85%
Cancelled
0.7%
Destinations
98
nonstop
Airlines
11

Monthly on-time trend

Monthly departure on-time percentage at SLC50%75%100%June 2024: 79% on-time (9,610 flights)79Jun 2024July 2024: 77% on-time (9,946 flights)77August 2024: 81% on-time (9,799 flights)81September 2024: 87% on-time (9,281 flights)87Sep 2024October 2024: 89% on-time (9,446 flights)89November 2024: 89% on-time (8,809 flights)89December 2024: 83% on-time (9,496 flights)83Dec 2024January 2025: 85% on-time (9,350 flights)85February 2025: 83% on-time (8,786 flights)83March 2025: 85% on-time (10,276 flights)85Mar 2025April 2025: 87% on-time (9,515 flights)87May 2025: 85% on-time (9,923 flights)85June 2025: 81% on-time (9,995 flights)81Jun 2025July 2025: 81% on-time (10,346 flights)81August 2025: 85% on-time (9,985 flights)85September 2025: 89% on-time (9,344 flights)89Sep 2025October 2025: 87% on-time (9,841 flights)87November 2025: 87% on-time (9,197 flights)87December 2025: 82% on-time (9,740 flights)82Dec 2025January 2026: 85% on-time (9,515 flights)85February 2026: 84% on-time (9,167 flights)84March 2026: 85% on-time (10,632 flights)85Mar 2026April 2026: 86% on-time (9,877 flights)86May 2026: 85% on-time (10,146 flights)85

Best time of day to depart from SLC

On-time percentage by scheduled departure hour at SLC5 a.m.: 94% on-time (2,733 flights)56 a.m.: 94% on-time (5,542 flights)67 a.m.: 91% on-time (11,863 flights)78 a.m.: 90% on-time (14,167 flights)89 a.m.: 90% on-time (18,268 flights)910 a.m.: 88% on-time (12,433 flights)1011 a.m.: 86% on-time (28,416 flights)1112 p.m.: 81% on-time (5,740 flights)121 p.m.: 83% on-time (15,245 flights)132 p.m.: 78% on-time (8,377 flights)143 p.m.: 84% on-time (21,555 flights)154 p.m.: 79% on-time (8,589 flights)165 p.m.: 80% on-time (24,281 flights)176 p.m.: 73% on-time (4,376 flights)187 p.m.: 71% on-time (2,429 flights)198 p.m.: 82% on-time (13,694 flights)209 p.m.: 85% on-time (12,133 flights)2110 p.m.: 83% on-time (11,445 flights)2211 p.m.: 82% on-time (10,281 flights)23scheduled departure hour

Busiest routes from SLC

RouteFlights/12moOn-timeAvg delay
SLC → DEN7,76377%16 min
SLC → PHX5,75284%12 min
SLC → SEA4,12380%11 min
SLC → LAX4,11786%9 min
SLC → DFW3,86277%21 min
SLC → LAS3,75477%15 min
SLC → SFO3,48775%18 min
SLC → ORD3,17378%21 min

Most reliable routes

  1. SLC → HLN96%
  2. SLC → GJT94%
  3. SLC → SUN94%
  4. SLC → GTF94%
  5. SLC → PIH93%

Most delay-prone routes

  1. SLC → ANC74%
  2. SLC → EWR74%
  3. SLC → SFO75%
  4. SLC → DFW77%
  5. SLC → DEN77%

Airline performance at SLC

AirlineOn-time departuresAvg delayFlights
SkyWest Airlines91%7 min68,552
Envoy Air85%9 min368
Delta Air Lines83%12 min109,952
United Airlines83%14 min9,082
Frontier Airlines80%19 min6,669
Hawaiian Airlines79%26 min580
Alaska Airlines79%11 min2,777
American Airlines79%22 min8,317
Southwest Airlines77%13 min23,181
Spirit Airlines76%20 min1,110
JetBlue Airways68%30 min1,434

Frequently asked questions

How often are flights delayed at SLC?
16% of departures from Salt Lake City International Airport left 15+ minutes late between 2024-06 and 2026-05, with an average departure delay of 12 minutes. The national on-time average over the same period was 78%.
What is the best time of day to depart from SLC?
Flights scheduled around 6 a.m. depart on time 94% of the time at SLC, versus 71% around 7 p.m.. Booking before noon is the usual rule of thumb here.
What is the worst month for delays at SLC?
In this dataset, July 2024 was the weakest month at SLC, with 77% of departures on time.
How often are flights cancelled at SLC?
0.7% of scheduled departures from SLC were cancelled in this period, compared with a national rate of 1.6%.

Popular route pages from this airport

Based on 232,022 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.