Route on-time record
ATL to SLC: most on-time flights and the best time to fly
Atlanta (Hartsfield Jackson Atlanta International Airport) to Salt Lake City (Salt Lake City International Airport). 2,966 nonstop flights in Jun 2025 to May 2026, 82% arrived within 15 minutes and 0.4% were cancelled. The most reliable flight number was Delta 387 at 11:00 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
ATL → SLC
Atlanta to Salt Lake City: 2,966 nonstop flights a year
On time (12 months)
82%
Cancelled
0.4%
avg delay 12 min
Best time to leave
9 AM to noon
90% on time vs 70% after 9 PM
Most reliable airline
Delta
82% chance on time
Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · Delta 387
11:00 AM → 1:16 PM4h 14m nonstop
Local times, typical schedule. Last flown 2026-05-31.
90%
chance on time
- On time (history)
- 91%
- Cancelled
- 0.5%
- Avg arrival delay
- 5 min
- Arrived on time 91% of the time (360 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (9 AM to noon: 90% on time; After 9 PM: 70%).
- Departs outside ATL's trouble window (1 PM to 7 PM, when 59% of its 96 ground stops and delay programs started).
Strong track record · 360 flights
Find Delta 387 fares Opens this date on Aviasales#2 · Delta 830
7:55 AM → 10:04 AM4h 10m nonstop
Local times, typical schedule. Last flown 2026-05-31.
88%
chance on time
- On time (history)
- 89%
- Cancelled
- 1.1%
- Avg arrival delay
- 7 min
- Arrived on time 89% of the time (361 flights, Jun 2025 to May 2026).
- Departs outside ATL's trouble window (1 PM to 7 PM, when 59% of its 96 ground stops and delay programs started).
Strong track record · 361 flights
Find Delta 830 fares Opens this date on Aviasales#3 · Delta 663
10:00 AM → 12:23 PM4h 10m nonstop
Local times, typical schedule. Last flown 2026-05-31.
88%
chance on time
- On time (history)
- 88%
- Cancelled
- 0.5%
- Avg arrival delay
- 8 min
- Arrived on time 88% of the time (363 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (9 AM to noon: 90% on time; After 9 PM: 70%).
- Departs outside ATL's trouble window (1 PM to 7 PM, when 59% of its 96 ground stops and delay programs started).
Strong track record · 363 flights
Find Delta 663 fares Opens this date on Aviasales#4 · Delta 423
1:55 PM → 4:00 PM4h 06m nonstop
Local times, typical schedule. Last flown 2026-05-31.
85%
chance on time
- On time (history)
- 86%
- Cancelled
- 0.3%
- Avg arrival delay
- 9 min
- Arrived on time 86% of the time (363 flights, Jun 2025 to May 2026).
- Departs inside ATL's trouble window: 59% of its 96 ground stops and delay programs started between 1 PM and 7 PM.
Strong track record · 363 flights
Find Delta 423 fares Opens this date on Aviasales#5 · Delta 653
5:43 PM → 8:00 PM4h 12m nonstop
Local times, typical schedule. Last flown 2026-05-31.
81%
chance on time
- On time (history)
- 81%
- Cancelled
- 0.0%
- Avg arrival delay
- 13 min
- Arrived on time 81% of the time (365 flights, Jun 2025 to May 2026).
- Never cancelled in 365 scheduled flights.
- Departs inside ATL's trouble window: 59% of its 96 ground stops and delay programs started between 1 PM and 7 PM.
Strong track record · 365 flights
Find Delta 653 fares Opens this date on Aviasales#6 · Delta 526
3:15 PM → 5:28 PM4h 11m nonstop
Local times, typical schedule. Last flown 2026-05-31.
79%
chance on time
- On time (history)
- 79%
- Cancelled
- 0.0%
- Avg arrival delay
- 11 min
- Arrived on time 79% of the time (365 flights, Jun 2025 to May 2026).
- Never cancelled in 365 scheduled flights.
- Departs inside ATL's trouble window: 59% of its 96 ground stops and delay programs started between 1 PM and 7 PM.
Strong track record · 365 flights
Find Delta 526 fares Opens this date on Aviasales#7 · Delta 660
7:30 PM → 9:47 PM4h 14m nonstop
Local times, typical schedule. Last flown 2026-05-31.
73%
chance on time
- On time (history)
- 73%
- Cancelled
- 0.6%
- Avg arrival delay
- 17 min
- Arrived on time 73% of the time (359 flights, Jun 2025 to May 2026).
- Departs outside ATL's trouble window (1 PM to 7 PM, when 59% of its 96 ground stops and delay programs started).
Strong track record · 359 flights
Find Delta 660 fares Opens this date on Aviasales#8 · Delta 453
9:35 PM → 11:57 PM4h 13m nonstop
Local times, typical schedule. Last flown 2026-05-31.
71%
chance on time
- On time (history)
- 71%
- Cancelled
- 0.6%
- Avg arrival delay
- 23 min
- Arrived on time 71% of the time (342 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (After 9 PM: 70% on time; 9 AM to noon: 90%).
- Departs outside ATL's trouble window (1 PM to 7 PM, when 59% of its 96 ground stops and delay programs started).
Strong track record · 342 flights
Find Delta 453 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Delta Air Lines82%
2,960 flights · 82% on time as flown · 0.4% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM89%
385 flights · avg delay 7 min
- 9 AM to noon90%
717 flights · avg delay 7 min
- Noon to 3 PM85%
457 flights · avg delay 9 min
- 3 to 6 PM80%
671 flights · avg delay 12 min
- 6 to 9 PM73%
371 flights · avg delay 17 min
- After 9 PM70%
365 flights · avg delay 24 min
Best day: Tuesday (87%). Worst: Sunday (81%).
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Airline (crew, maintenance, boarding)56%
- Late-arriving aircraft22%
- Air traffic control and airport volume15%
- Severe weather7%
Share of delay minutes by the cause airlines report to the US DOT.
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure
ATL to SLC questions
- What time of day is best to fly ATL to SLC?
- 9 AM to noon: 90% of flights arrived on time, against 70% for departures after 9 PM.
- Which airline is most on time from ATL to SLC?
- Delta, with a season-adjusted 82% chance of operating and arriving on time over 2,960 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on ATL to SLC?
- July (75% on time); the best was November (92%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from ATL
- SLC to ATL (return)
- ATL to LGA 73%
- ATL to MCO 69%
- ATL to FLL 69%
- ATL to DCA 69%
- ATL to DFW 73%
- ATL to ORD 71%
- ATL to EWR 72%
- ATL to MIA 70%
- ATL to TPA 71%
- ATL to PHL 73%
- ATL to DEN 76%
- ATL to BWI 74%
Live status: FAA delays and ground stops