ATL to DEN flight delays & on-time performance
Nonstop flights from Hartsfield Jackson Atlanta International Airport to Denver International Airport · 1,199 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at ATL or DEN right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Atlanta (ATL) to Denver (DEN) arrived on time 78% of the time in Aug 2025 – Jul 2026, in line with the national average.
- 1.1% were cancelled, and 7% arrived an hour or more late.
- United Airlines was the most punctual airline here (86% on time); Frontier Airlines was the least (72%).
- Departures scheduled around 6am did best (92% on time); around 7pm did worst (62%).
- Wednesday was the most reliable day to fly (85% on time) and Sunday the least (71%).
- The largest source of delay minutes was late-arriving aircraft (36%).
Which airline is most on time from ATL to DEN?
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 |
|---|---|---|---|---|---|
| United Airlines | 86% | 0.5% | 12 min | 6.4% | 941 |
| Delta Air Lines | 79% | 1.2% | 12 min | 5.8% | 2,810 |
| Southwest Airlines | 73% | 1.1% | 16 min | 8.8% | 1,075 |
| Frontier Airlines | 72% | 1.3% | 24 min | 9.8% | 769 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am92%182 flights
- 7am86%496 flights
- 8am88%422 flights
- 9am87%332 flights
- 10am82%355 flights
- 11am90%393 flights
- 12pm84%461 flights
- 1pm78%356 flights
- 2pm77%202 flights
- 3pm72%110 flights
- 4pm73%628 flights
- 5pm49%81 flights
- 6pm65%459 flights
- 7pm62%279 flights
- 8pm68%387 flights
- 9pm79%205 flights
- 10pm75%200 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday76%0.7% cancelled
- Tuesday81%0.5% cancelled
- Wednesday85%0.1% cancelled
- Thursday79%0.4% cancelled
- Friday80%1.7% cancelled
- Saturday76%2.5% cancelled
- Sunday71%1.8% 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 aircraft36%
- Airline (crew, maintenance, cleaning, fueling)34%
- Air traffic control & airport congestion26%
- Extreme weather4%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)57%
- Extreme weather36%
- Air traffic control & airport congestion7%
- Security0%
ATL to DEN: common questions
- How often are ATL to DEN flights on time?
- 78% 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 Atlanta to Denver cancelled?
- 1.1% of scheduled flights were cancelled (61 of 5,595).
- How long are typical delays?
- Across all flights the average arrival delay was 14 min (early arrivals count as zero). Flights that were late arrived 60 min behind schedule on average, and 7.0% of flights were an hour or more late.
- How long is taxi time at ATL?
- Flights on this route spent 17 min taxiing from the gate to takeoff on average.
Related routes
Return trip: DEN to ATL — 79% on time
More flights from Atlanta
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: ATL → DEN, nonstop flights by US airlines that report to the DOT. How we calculate this.