DEN to MIA flight delays & on-time performance
Nonstop flights from Denver International Airport to Miami International Airport · 1,709 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at DEN or MIA 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 Miami (MIA) arrived on time 74% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 0.5% were cancelled, and 8% arrived an hour or more late.
- American Airlines was the most punctual airline here (77% on time); Southwest Airlines was the least (65%).
- Departures scheduled around 7am did best (84% on time); around 11am did worst (54%).
- Tuesday was the most reliable day to fly (81% on time) and Friday the least (67%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (40%).
Which airline is most on time from DEN to MIA?
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 |
|---|---|---|---|---|---|
| American Airlines | 77% | 0.9% | 23 min | 8.9% | 886 |
| United Airlines | 76% | 0.1% | 17 min | 8.2% | 910 |
| Frontier Airlines | 73% | 0.6% | 17 min | 7.2% | 349 |
| Southwest Airlines | 65% | 0.6% | 19 min | 9.5% | 323 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 12am83%91 flights
- 6am77%26 flights
- 7am84%92 flights
- 8am77%52 flights
- 9am76%275 flights
- 10am72%207 flights
- 11am54%79 flights
- 12pm79%311 flights
- 1pm71%228 flights
- 2pm69%88 flights
- 3pm72%130 flights
- 4pm81%94 flights
- 5pm74%129 flights
- 6pm64%33 flights
- 11pm74%620 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday77%1.7% cancelled
- Tuesday81%0.6% cancelled
- Wednesday75%0.3% cancelled
- Thursday78%0.0% cancelled
- Friday67%0.0% cancelled
- Saturday73%0.3% cancelled
- Sunday71%0.8% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)40%
- Late-arriving aircraft37%
- Air traffic control & airport congestion22%
- Extreme weather2%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather54%
- Airline (crew, maintenance, cleaning, fueling)31%
- Air traffic control & airport congestion15%
- Security0%
DEN to MIA: common questions
- How often are DEN to MIA flights on time?
- 74% 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 Miami cancelled?
- 0.5% of scheduled flights were cancelled (13 of 2,468).
- How long are typical delays?
- Across all flights the average arrival delay was 19 min (early arrivals count as zero). Flights that were late arrived 72 min behind schedule on average, and 8.5% of flights were an hour or more late.
- How long is taxi time at DEN?
- Flights on this route spent 19 min taxiing from the gate to takeoff on average.
Related routes
Return trip: MIA to DEN — 77% 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 → MIA, nonstop flights by US airlines that report to the DOT. How we calculate this.