Airports › Salt Lake City (SLC) › August 2025
Airport month · August 2025
Salt Lake City International in August 2025
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 August 2025, reporting carriers scheduled 9,985 domestic departures from Salt Lake City International (SLC). 84.8% left less than 15 minutes late and 83.6% reached their destination on time; 0.4% were cancelled.
Nationally that month, 76.8% of flights departed on time and 76.3% arrived on time, so SLC departures were 8.0 points above the national departure figure.
A year earlier, in August 2024, the airport had 9,799 departures with 80.0% leaving on time: a change of +4.8 points, with flights up 2%.
Flights arriving at SLC that month were on time 84.4% of the time (9,959 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 52%, late-arriving aircraft 26% and national aviation system 20%.
- On time 83.6%
- Arrived 15+ minutes late 15.6%
- Cancelled 0.4%
- Diverted 0.4%
August 2025 against a year earlier, the airport's year and the nation
| Measure | Aug 2025 | Aug 2024 | SLC, 12 months to Jul 2026 | All reported flights, Aug 2025 |
|---|---|---|---|---|
| Departed on time | 84.8% | 80.0% | 84.0% | 76.8% |
| Arrived on time | 83.6% | 79.1% | 83.8% | 76.3% |
| Cancelled | 0.4% | 0.6% | 0.8% | 1.1% |
| Average departure delay (late minutes only) | 10.7 min | 15.5 min | 11.0 min | 17.6 min |
| Scheduled departures a day | 333 | 327 | 323 | 20,079 |
| Scheduled departures | 9,985 | 9,799 | 117,896 | 602,378 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| DL Delta Air Lines | 4,648 | 47% | 82.2% | 4.1 min | 0.2% |
| OO SkyWest Airlines | 3,122 | 31% | 92.4% | -4.4 min | 0.0% |
| WN Southwest Airlines | 924 | 9% | 78.9% | 7.0 min | 0.1% |
| UA United Airlines | 395 | 4% | 72.9% | 7.7 min | 1.3% |
| AA American Airlines | 385 | 4% | 68.1% | 10.3 min | 3.6% |
| F9 Frontier Airlines | 225 | 2% | 71.1% | 8.8 min | 1.3% |
| AS Alaska Airlines | 143 | 1% | 62.2% | 12.2 min | 2.1% |
| B6 JetBlue Airways | 54 | 1% | 75.9% | 12.5 min | 1.9% |
| NK Spirit Airlines | 52 | 1% | 80.8% | 4.0 min | 3.8% |
| HA Hawaiian Airlines | 31 | 0% | 80.6% | 7.3 min | 0.0% |
| MQ Envoy Air | 6 | 0% | 83.3% | 1.5 min | 0.0% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| SLC–DEN | Salt Lake City to Denver | 669 | 70.6% | 14.4 min | 0.4% |
| SLC–PHX | Salt Lake City to Phoenix | 429 | 85.3% | 0.5 min | 0.2% |
| SLC–SEA | Salt Lake City to Seattle | 409 | 71.1% | 8.3 min | 1.2% |
| SLC–DFW | Salt Lake City to Dallas/Fort Worth | 320 | 63.7% | 20.3 min | 3.1% |
| SLC–LAX | Salt Lake City to Los Angeles | 303 | 87.8% | -0.4 min | 0.3% |
| SLC–SFO | Salt Lake City to San Francisco | 295 | 81.0% | -1.0 min | 0.3% |
| SLC–LAS | Salt Lake City to Las Vegas | 294 | 79.9% | 6.1 min | 0.3% |
| SLC–ORD | Salt Lake City to Chicago | 260 | 73.5% | 7.7 min | 1.9% |
| SLC–ATL | Salt Lake City to Atlanta | 250 | 83.2% | -3.0 min | 0.4% |
| SLC–PDX | Salt Lake City to Portland | 222 | 88.7% | -1.0 min | 0.5% |
| SLC–SAN | Salt Lake City to San Diego | 208 | 81.3% | 3.6 min | 0.0% |
| SLC–SMF | Salt Lake City to Sacramento | 189 | 82.5% | 4.4 min | 0.0% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left SLC on time in August 2025?
84.8% of 9,985 scheduled domestic departures left less than 15 minutes late, and 83.6% reached their destination on time. The national figures that month were 76.8% and 76.3%.
How does that compare with a year earlier?
In August 2024, 80.0% of 9,799 departures left on time and 0.6% were cancelled, against 84.8% and 0.4% in August 2025.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for August 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.