Route on-time record
DEN to MIA: most on-time flights and the best time to fly
Denver (Denver International Airport) to Miami (Miami International Airport). 2,509 nonstop flights in Jun 2025 to May 2026, 73% arrived within 15 minutes and 0.7% were cancelled. The most reliable flight number was American 1219 at 12:33 PM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
DEN → MIA
Denver to Miami: 2,509 nonstop flights a year
On time (12 months)
73%
Cancelled
0.7%
avg delay 21 min
Best time to leave
Before 9 AM
80% on time vs 68% 3 to 6 PM
Most reliable airline
American
75% 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 · American 1219
12:33 PM → 6:37 PM4h 04m nonstop
Local times, typical schedule. Last flown 2026-04-06.
86%
chance on time
- On time (history)
- 93%
- Cancelled
- 0.0%
- Avg arrival delay
- 3 min
- Arrived on time 93% of the time (29 flights, Jun 2025 to May 2026).
- Never cancelled in 30 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 MIA's trouble window: 49% of its 45 ground stops and delay programs started between 1 PM and 7 PM.
Limited track record · 29 flights
Find American 1219 fares Opens this date on Aviasales#2 · American 2986
7:01 AM → 1:06 PM4h 05m nonstop
Local times, typical schedule. Last flown 2026-04-06.
79%
chance on time
- On time (history)
- 82%
- Cancelled
- 1.3%
- Avg arrival delay
- 49 min
- Arrived on time 82% of the time (154 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 80% on time; 3 to 6 PM: 68%).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
- Lands inside MIA's trouble window: 49% of its 45 ground stops and delay programs started between 1 PM and 7 PM.
Moderate track record · 154 flights
Find American 2986 fares Opens this date on Aviasales#3 · United 352
4:00 PM → 9:53 PM3h 53m nonstop
Local times, typical schedule. Last flown 2026-04-27.
78%
chance on time
- On time (history)
- 79%
- Cancelled
- 0.0%
- Avg arrival delay
- 21 min
- Arrived on time 79% of the time (42 flights, Jun 2025 to May 2026).
- Never cancelled in 42 scheduled flights.
- Leaves in this route's least on-time window (3 to 6 PM: 68% on time; Before 9 AM: 80%).
- Departs inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
Limited track record · 42 flights
Find United 352 fares Opens this date on Aviasales#4 · American 1737
11:45 PM → 5:38 AM3h 53m nonstop
Local times, typical schedule. Last flown 2026-05-31.
77%
chance on time
- On time (history)
- 82%
- Cancelled
- 0.0%
- Avg arrival delay
- 7 min
- Arrived on time 82% of the time (11 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).
- Short track record (11 flights), so its score leans on the airline's record at this hour.
Limited track record · 11 flights
Find American 1737 fares Opens this date on Aviasales#5 · United 2610
11:59 PM → 5:51 AM3h 52m nonstop
Local times, typical schedule. Last flown 2026-03-27.
77%
chance on time
- On time (history)
- 76%
- Cancelled
- 0.0%
- Avg arrival delay
- 11 min
- Arrived on time 76% of the time (17 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).
- Short track record (17 flights), so its score leans on the airline's record at this hour.
Limited track record · 17 flights
Find United 2610 fares Opens this date on Aviasales#6 · American 3118
12:22 PM → 6:28 PM4h 06m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as American 3023; its record covers all of them.
77%
chance on time
- On time (history)
- 73%
- Cancelled
- 1.4%
- Avg arrival delay
- 21 min
- Arrived on time 73% of the time (142 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 MIA's trouble window: 49% of its 45 ground stops and delay programs started between 1 PM and 7 PM.
Moderate track record · 142 flights
Find American 3118 fares Opens this date on Aviasales#7 · United 1701
10:09 AM → 4:16 PM4h 07m nonstop
Local times, typical schedule. Last flown 2026-05-31.
76%
chance on time
- On time (history)
- 82%
- Cancelled
- 0.0%
- Avg arrival delay
- 7 min
- Arrived on time 82% of the time (11 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 MIA's trouble window: 49% of its 45 ground stops and delay programs started between 1 PM and 7 PM.
- Short track record (11 flights), so its score leans on the airline's record at this hour.
Limited track record · 11 flights
Find United 1701 fares Opens this date on Aviasales#8 · United 538
9:40 AM → 3:44 PM4h 04m nonstop
Local times, typical schedule. Last flown 2026-05-20. Same departure also flew as United 572, 1418; its record covers all of them.
76%
chance on time
- On time (history)
- 79%
- Cancelled
- 0.0%
- Avg arrival delay
- 14 min
- Arrived on time 79% of the time (257 flights, Jun 2025 to May 2026).
- Never cancelled in 258 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 MIA's trouble window: 49% of its 45 ground stops and delay programs started between 1 PM and 7 PM.
Strong track record · 257 flights
Find United 538 fares Opens this date on Aviasales#9 · United 2348
1:25 PM → 7:29 PM4h 04m nonstop
Local times, typical schedule. Last flown 2026-05-20.
75%
chance on time
- On time (history)
- 81%
- Cancelled
- 0.0%
- Avg arrival delay
- 15 min
- Arrived on time 81% of the time (21 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).
- Short track record (21 flights), so its score leans on the airline's record at this hour.
Limited track record · 21 flights
Find United 2348 fares Opens this date on Aviasales#10 · United 2234
1:50 PM → 7:54 PM4h 04m nonstop
Local times, typical schedule. Last flown 2026-04-29.
74%
chance on time
- On time (history)
- 78%
- Cancelled
- 0.0%
- Avg arrival delay
- 18 min
- Arrived on time 78% of the time (112 flights, Jun 2025 to May 2026).
- Never cancelled in 113 scheduled flights.
- 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 · 112 flights
Find United 2234 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- American Airlines75%
885 flights · 77% on time as flown · 1.1% cancel
- United Airlines75%
954 flights · 74% on time as flown · 0.2% cancel
- Frontier Airlines71%
345 flights · 72% on time as flown · 1.0% cancel
- Southwest Airlines64%
325 flights · 62% on time as flown · 0.6% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM80%
174 flights · avg delay 45 min
- 9 AM to noon72%
550 flights · avg delay 17 min
- Noon to 3 PM75%
596 flights · avg delay 18 min
- 3 to 6 PM68%
398 flights · avg delay 24 min
- After 9 PM75%
752 flights · avg delay 18 min
Best day: Tuesday (76%). Worst: Friday (67%).
Smarter routing
Nearby airports that run more on time
DEN → FLL 78% chance on time
Denver International Airport to Fort Lauderdale Hollywood International Airport · 1,655 flights a year · 21 mi from your airports · yours: 73%
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)43%
- Late-arriving aircraft34%
- Air traffic control and airport volume20%
- Severe weather2%
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 MIA questions
- What time of day is best to fly DEN to MIA?
- Before 9 AM: 80% of flights arrived on time, against 68% for departures 3 to 6 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 MIA?
- American, with a season-adjusted 75% chance of operating and arriving on time over 885 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 MIA?
- July (57% on time); the best was November (82%), 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
- MIA 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 ATL 80%
- DEN to SFO 68%
- DEN to AUS 76%
Live status: FAA delays and ground stops