DEN to ATL flight delays & on-time performance
Nonstop flights from Denver International Airport to Hartsfield Jackson Atlanta International Airport · 1,199 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at DEN or ATL right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Denver (DEN) to Atlanta (ATL) arrived on time 79% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0.9% were cancelled, and 6% arrived an hour or more late.
- Delta Air Lines was the most punctual airline here (86% on time); Southwest Airlines was the least (64%).
- Departures scheduled around 5am did best (95% on time); around 5pm did worst (68%).
- Wednesday was the most reliable day to fly (83% on time) and Sunday the least (75%).
- The largest source of delay minutes was late-arriving aircraft (41%).
Which airline is most on time from DEN to ATL?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Delta Air Lines | 86% | 1.2% | 9 min | 4.1% | 2,810 |
| United Airlines | 78% | 0.4% | 15 min | 7.8% | 941 |
| Frontier Airlines | 78% | 0.8% | 15 min | 6.4% | 775 |
| Southwest Airlines | 64% | 0.7% | 20 min | 9.6% | 1,076 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 12am90%385 flights
- 5am95%196 flights
- 6am90%312 flights
- 7am93%401 flights
- 9am77%288 flights
- 10am80%909 flights
- 11am77%180 flights
- 12pm87%262 flights
- 1pm81%702 flights
- 2pm77%393 flights
- 3pm75%244 flights
- 4pm78%448 flights
- 5pm68%446 flights
- 6pm41%74 flights
- 7pm43%126 flights
- 11pm63%147 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday79%0.5% cancelled
- Tuesday83%0.5% cancelled
- Wednesday83%0.4% cancelled
- Thursday76%0.3% cancelled
- Friday79%1.2% cancelled
- Saturday81%2.1% cancelled
- Sunday75%1.5% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft41%
- Airline (crew, maintenance, cleaning, fueling)39%
- Air traffic control & airport congestion17%
- Extreme weather3%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)55%
- Extreme weather33%
- Air traffic control & airport congestion12%
- Security0%
DEN to ATL: common questions
- How often are DEN to ATL flights on time?
- 79% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Denver to Atlanta cancelled?
- 0.9% of scheduled flights were cancelled (51 of 5,602).
- How long are typical delays?
- Across all flights the average arrival delay was 13 min (early arrivals count as zero). Flights that were late arrived 59 min behind schedule on average, and 6.1% of flights were an hour or more late.
- How long is taxi time at DEN?
- Flights on this route spent 18 min taxiing from the gate to takeoff on average.
Related routes
Return trip: ATL to DEN — 78% on time
More flights from Denver
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: DEN → ATL, nonstop flights by US airlines that report to the DOT. How we calculate this.