Route on-time record
DEN to ATL: most on-time flights and the best time to fly
Denver (Denver International Airport) to Atlanta (Hartsfield Jackson Atlanta International Airport). 5,586 nonstop flights in Jun 2025 to May 2026, 80% arrived within 15 minutes and 0.9% were cancelled. The most reliable flight number was Delta 341 at 5:45 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
DEN → ATL
Denver to Atlanta: 5,586 nonstop flights a year
On time (12 months)
80%
Cancelled
0.9%
avg delay 14 min
Best time to leave
Before 9 AM
90% on time vs 52% 6 to 9 PM
Most reliable airline
Delta
84% 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 341
5:45 AM → 10:42 AM2h 57m nonstop
Local times, typical schedule. Last flown 2026-05-31.
91%
chance on time
- On time (history)
- 92%
- Cancelled
- 1.4%
- Avg arrival delay
- 7 min
- Arrived on time 92% of the time (360 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 90% on time; 6 to 9 PM: 52%).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
Strong track record · 360 flights
Find Delta 341 fares Opens this date on Aviasales#2 · Delta 431
7:05 AM → 11:58 AM2h 55m nonstop
Local times, typical schedule. Last flown 2026-05-31.
89%
chance on time
- On time (history)
- 90%
- Cancelled
- 1.4%
- Avg arrival delay
- 10 min
- Arrived on time 90% of the time (359 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 90% on time; 6 to 9 PM: 52%).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
Strong track record · 359 flights
Find Delta 431 fares Opens this date on Aviasales#3 · Delta 302
12:55 AM → 5:51 AM2h 56m nonstop
Local times, typical schedule. Last flown 2026-05-30.
88%
chance on time
- On time (history)
- 90%
- Cancelled
- 2.3%
- Avg arrival delay
- 6 min
- Arrived on time 90% of the time (169 flights, Jun 2025 to May 2026).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
Moderate track record · 169 flights
Find Delta 302 fares Opens this date on Aviasales#4 · United 2424
10:05 AM → 3:13 PM3h 08m nonstop
Local times, typical schedule. Last flown 2026-05-31.
86%
chance on time
- On time (history)
- 88%
- Cancelled
- 0.0%
- Avg arrival delay
- 7 min
- Arrived on time 88% of the time (163 flights, Jun 2025 to May 2026).
- Never cancelled in 165 scheduled flights.
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
- Lands inside ATL's trouble window: 59% of its 96 ground stops and delay programs started between 1 PM and 7 PM.
Moderate track record · 163 flights
Find United 2424 fares Opens this date on Aviasales#5 · Delta 2235
9:49 AM → 4:38 PM2h 55m nonstop
Local times, typical schedule. Last flown 2026-05-31.
85%
chance on time
- On time (history)
- 86%
- Cancelled
- 0.8%
- Avg arrival delay
- 7 min
- Arrived on time 86% of the time (254 flights, Jun 2025 to May 2026).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
- Lands inside ATL's trouble window: 59% of its 96 ground stops and delay programs started between 1 PM and 7 PM.
Strong track record · 254 flights
Find Delta 2235 fares Opens this date on Aviasales#6 · Delta 706
1:50 PM → 6:54 PM3h 04m nonstop
Local times, typical schedule. Last flown 2026-05-31.
85%
chance on time
- On time (history)
- 80%
- Cancelled
- 0.0%
- Avg arrival delay
- 18 min
- Arrived on time 80% of the time (106 flights, Jun 2025 to May 2026).
- Never cancelled in 108 scheduled flights.
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
- Lands inside ATL's trouble window: 59% of its 96 ground stops and delay programs started between 1 PM and 7 PM.
Moderate track record · 106 flights
Find Delta 706 fares Opens this date on Aviasales#7 · Delta 475
3:15 PM → 8:22 PM3h 07m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Delta 957; its record covers all of them.
85%
chance on time
- On time (history)
- 85%
- Cancelled
- 0.5%
- Avg arrival delay
- 11 min
- Arrived on time 85% of the time (214 flights, Jun 2025 to May 2026).
- Departs inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
- 52% of its delay minutes came from the plane arriving late from an earlier flight.
Strong track record · 214 flights
Find Delta 475 fares Opens this date on Aviasales#8 · Delta 995
11:43 AM → 4:45 PM3h 01m nonstop
Local times, typical schedule. Last flown 2026-05-31.
84%
chance on time
- On time (history)
- 86%
- Cancelled
- 1.1%
- Avg arrival delay
- 8 min
- Arrived on time 86% of the time (342 flights, Jun 2025 to May 2026).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
- Lands inside ATL's trouble window: 59% of its 96 ground stops and delay programs started between 1 PM and 7 PM.
Strong track record · 342 flights
Find Delta 995 fares Opens this date on Aviasales#9 · Frontier 3294
6:30 AM → 11:33 AM3h 03m nonstop
Local times, typical schedule. Last flown 2026-05-31.
83%
chance on time
- On time (history)
- 83%
- Cancelled
- 0.3%
- Avg arrival delay
- 11 min
- Arrived on time 83% of the time (294 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 90% on time; 6 to 9 PM: 52%).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
Strong track record · 294 flights
Find Frontier 3294 fares Opens this date on Aviasales#10 · Delta 564
4:41 PM → 9:52 PM3h 11m nonstop
Local times, typical schedule. Last flown 2026-05-31.
83%
chance on time
- On time (history)
- 84%
- Cancelled
- 0.0%
- Avg arrival delay
- 18 min
- Arrived on time 84% of the time (25 flights, Jun 2025 to May 2026).
- Departs inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
- Short track record (25 flights), so its score leans on the airline's record at this hour.
Limited track record · 25 flights
Find Delta 564 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Delta Air Lines84%
2,802 flights · 85% on time as flown · 1.2% cancel
- Frontier Airlines78%
710 flights · 79% on time as flown · 0.7% cancel
- United Airlines78%
992 flights · 77% on time as flown · 0.5% cancel
- Southwest Airlines67%
1,082 flights · 67% on time as flown · 0.8% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM90%
928 flights · avg delay 8 min
- 9 AM to noon82%
1,284 flights · avg delay 11 min
- Noon to 3 PM82%
1,426 flights · avg delay 13 min
- 3 to 6 PM69%
1,187 flights · avg delay 24 min
- 6 to 9 PM52%
186 flights · avg delay 30 min
- After 9 PM83%
575 flights · avg delay 11 min
Best day: Wednesday (83%). Worst: Sunday (76%).
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
- Late-arriving aircraft41%
- Airline (crew, maintenance, boarding)40%
- Air traffic control and airport volume15%
- Severe weather4%
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
DEN to ATL questions
- What time of day is best to fly DEN to ATL?
- Before 9 AM: 90% of flights arrived on time, against 52% for departures 6 to 9 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
- Which airline is most on time from DEN to ATL?
- Delta, with a season-adjusted 84% chance of operating and arriving on time over 2,802 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 DEN to ATL?
- July (69% on time); the best was November (86%), 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 DEN
- ATL to DEN (return)
- DEN to PHX 75%
- DEN to SLC 77%
- DEN to LAX 79%
- DEN to LAS 75%
- DEN to SEA 73%
- DEN to ORD 70%
- DEN to DFW 75%
- DEN to SAN 76%
- DEN to MSP 78%
- DEN to SFO 68%
- DEN to AUS 76%
- DEN to COS 75%
Live status: FAA delays and ground stops