Best Time to Fly ATL to SLC: On-Time Stats by Hour & Airline
Hartsfield-Jackson Atlanta International → Salt Lake City International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 82.9% of Atlanta (ATL) to Salt Lake City (SLC) flights arrived on time (2,964 scheduled flights). That is 5.3 points above the national average of 77.6%.
Delta Air Lines was the only reporting airline with regular flights on this route.
November has been the best month (89% on time) and Sunday the weakest day of the week (79%).
0.5% of flights were cancelled, versus 1.8% nationally.
ATL to SLC on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Lines | 82.9% | 61 min | 0.5% | 2,958 |
| Frontier Airlines | Limited data | 6 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly ATL to SLC
On-time arrival % by scheduled departure hour (local time), 5,902 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | Limited data | 3 | |
| 7am–8am | 93.2% | 1.9% | 105 |
| 8am–9am | 89.8% | 0.5% | 649 |
| 9am–10am | 88.4% | 2.0% | 98 |
| 10am–11am | 89.9% | 0.3% | 648 |
| 11am–12pm | 88.7% | 0.5% | 665 |
| 12pm–1pm | 87.7% | 0.0% | 73 |
| 1pm–2pm | 85.5% | 0.4% | 526 |
| 2pm–3pm | 83.0% | 0.4% | 266 |
| 3pm–4pm | 80.7% | 0.2% | 546 |
| 4pm–5pm | 77.0% | 1.6% | 128 |
| 5pm–6pm | 81.2% | 0.0% | 713 |
| 6pm–7pm | 77.5% | 0.0% | 41 |
| 7pm–8pm | 75.1% | 0.3% | 667 |
| 8pm–9pm | 61.9% | 0.0% | 42 |
| 9pm–10pm | 75.2% | 0.6% | 334 |
| 10pm–11pm | 72.2% | 0.5% | 373 |
| 11pm–12am | Limited data | 25 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on ATL to SLC
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 84.3% | +0.4 pts | 0.0% | 108 |
| Christmas & New Year (Dec 20 - Jan 3) | 83.3% | -0.6 pts | 0.0% | 245 |
| Summer peak (Jun 15 - Aug 15) | 77.4% | -6.5 pts | 0.6% | 996 |
| All other days | 83.9% | — | 0.4% | 4,553 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).