Best Time to Fly SLC to ATL: On-Time Stats by Hour & Airline
Salt Lake City International → Hartsfield-Jackson Atlanta International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 86.7% of Salt Lake City (SLC) to Atlanta (ATL) flights arrived on time (2,972 scheduled flights). That is 9.0 points above the national average of 77.6%.
Delta Air Lines was the only reporting airline with regular flights on this route.
Over 24 months, Wednesday was the most reliable day (89% on time) and July the worst month (78%).
The cancellation rate was 0.6% (US average 1.8%).
SLC to ATL 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 | 86.7% | 66 min | 0.6% | 2,966 |
| Frontier Airlines | Limited data | 6 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SLC to ATL
On-time arrival % by scheduled departure hour (local time), 5,908 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 12am–1am | Limited data | 11 | |
| 6am–7am | 91.5% | 1.4% | 214 |
| 7am–8am | 94.1% | 0.2% | 526 |
| 8am–9am | 88.5% | 0.7% | 727 |
| 9am–10am | 86.5% | 0.5% | 664 |
| 10am–11am | 90.8% | 0.0% | 131 |
| 11am–12pm | 83.9% | 0.9% | 671 |
| 12pm–1pm | 94.1% | 2.9% | 35 |
| 1pm–2pm | 82.7% | 0.4% | 477 |
| 2pm–3pm | 83.1% | 0.0% | 254 |
| 3pm–4pm | 81.2% | 0.0% | 730 |
| 4pm–5pm | Limited data | 8 | |
| 5pm–6pm | 81.2% | 0.3% | 726 |
| 6pm–7pm | Limited data | 2 | |
| 10pm–11pm | Limited data | 1 | |
| 11pm–12am | 83.9% | 0.6% | 731 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SLC to ATL
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) | 90.7% | +4.0 pts | 0.0% | 109 |
| Christmas & New Year (Dec 20 - Jan 3) | 84.8% | -1.9 pts | 0.4% | 245 |
| Summer peak (Jun 15 - Aug 15) | 78.3% | -8.4 pts | 0.6% | 997 |
| All other days | 86.8% | — | 0.5% | 4,557 |
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).