Salt Lake City International (SLC) Delays and On-Time Departures
Salt Lake City, UT · ranked 57th of 333 airports for on-time departures
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, Salt Lake City (SLC) had 117,896 scheduled departures and 84.7% of them left on time (US average 77.4%).
That ranks 57th of 333 US airports tracked on this site, with 0.8% of departures cancelled.
SkyWest Airlines was the most punctual airline here, with 90.7% of departures on time.
October has been the best month (88% on time) and Sunday the weakest day of the week (82%).
Best time of day to fly out of Salt Lake City (SLC)
On-time departure % by scheduled departure hour (local time), last 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 12am–1am | 75.8% | 2.6% | 467 |
| 1am–2am | Limited data | 13 | |
| 4am–5am | Limited data | 1 | |
| 5am–6am | 94.2% | 0.9% | 2,705 |
| 6am–7am | 94.0% | 0.7% | 5,591 |
| 7am–8am | 91.2% | 0.8% | 12,671 |
| 8am–9am | 90.1% | 0.4% | 13,714 |
| 9am–10am | 89.6% | 0.4% | 18,434 |
| 10am–11am | 88.5% | 0.6% | 13,503 |
| 11am–12pm | 86.0% | 0.5% | 27,385 |
| 12pm–1pm | 81.7% | 0.8% | 5,687 |
| 1pm–2pm | 83.3% | 0.6% | 15,679 |
| 2pm–3pm | 78.3% | 0.7% | 8,082 |
| 3pm–4pm | 83.6% | 0.4% | 21,788 |
| 4pm–5pm | 78.2% | 0.9% | 8,643 |
| 5pm–6pm | 79.9% | 0.6% | 24,434 |
| 6pm–7pm | 73.0% | 0.7% | 4,476 |
| 7pm–8pm | 71.0% | 0.8% | 2,330 |
| 8pm–9pm | 81.1% | 0.4% | 14,179 |
| 9pm–10pm | 85.4% | 0.4% | 11,777 |
| 10pm–11pm | 84.0% | 0.6% | 11,037 |
| 11pm–12am | 83.2% | 0.9% | 10,322 |
Airlines at SLC ranked by on-time departures
Last 12 months. Airlines with fewer than 30 departures are marked “limited data”.
| Airline | On-time departures | On-time arrivals | Cancelled | Departures |
|---|---|---|---|---|
| SkyWest Airlines | 90.7% | 90.4% | 0.4% | 36,266 |
| Spirit Airlines | 84.2% | 80.8% | 3.2% | 124 |
| Delta Air Lines | 84.0% | 83.8% | 0.8% | 54,665 |
| United Airlines | 83.2% | 80.6% | 1.1% | 4,870 |
| Frontier Airlines | 83.1% | 80.4% | 1.5% | 3,559 |
| Alaska Airlines | 79.1% | 76.1% | 1.5% | 1,701 |
| American Airlines | 78.3% | 79.3% | 2.4% | 4,649 |
| Envoy Air | 76.2% | 76.8% | 0.0% | 109 |
| Southwest Airlines | 74.6% | 78.4% | 0.5% | 11,224 |
| Hawaiian Airlines | 71.9% | 79.6% | 0.0% | 153 |
| JetBlue | 66.1% | 74.8% | 4.5% | 576 |
80%+ good 70–79.9% fair <70% poor
Best day to fly out of SLC
On-time departures by day, 24 months.
Best month to fly out of SLC
On-time departures by month, 24 months.
Holiday travel at Salt Lake City (SLC)
On-time departures during holiday periods compared with all other days, last 24 months.
| Period | On-time departures | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 84.5% | -1.5 pts | 0.3% | 4,184 |
| Christmas & New Year (Dec 20 - Jan 3) | 78.5% | -7.4 pts | 0.8% | 9,525 |
| Summer peak (Jun 15 - Aug 15) | 80.2% | -5.8 pts | 0.7% | 41,291 |
| All other days | 85.9% | — | 0.5% | 177,918 |
Monthly on-time departure trend at SLC
On-time departure % each month, with the 12-month US average for reference.
Routes from Salt Lake City (SLC)
Every route from SLC with its own page, by number of flights (last 12 months, on-time arrivals).