Route on-time record

MIA to DEN: most on-time flights and the best time to fly

Miami (Miami International Airport) to Denver (Denver International Airport). 2,510 nonstop flights in Jun 2025 to May 2026, 78% arrived within 15 minutes and 0.6% were cancelled. The most reliable flight number was United 2327 at 7:30 AM.

Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.

MIA → DEN

Miami to Denver: 2,510 nonstop flights a year

On time (12 months)

78%

Cancelled

0.6%

avg delay 16 min

Best time to leave

Before 9 AM

89% on time vs 68% 3 to 6 PM

Most reliable airline

United

82% chance on time

Check MIA to DEN fares

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 · United 2327
7:30 AM → 10:11 AM4h 41m nonstop
Local times, typical schedule. Last flown 2026-05-20.
90%
chance on time
On time (history)
90%
Cancelled
0.0%
Avg arrival delay
4 min
- Arrived on time 90% of the time (20 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; 3 to 6 PM: 68%).
- Departs outside MIA's trouble window (1 PM to 7 PM, when 49% of its 45 ground stops and delay programs started).
- Short track record (20 flights), so its score leans on the airline's record at this hour.
Limited track record · 20 flights
Find United 2327 fares Opens this date on Aviasales
#2 · United 2045
7:40 AM → 10:21 AM4h 39m nonstop
Local times, typical schedule. Last flown 2026-05-31.
89%
chance on time
On time (history)
90%
Cancelled
0.0%
Avg arrival delay
5 min
- Arrived on time 90% of the time (88 flights, Jun 2025 to May 2026).
- Never cancelled in 88 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; 3 to 6 PM: 68%).
- Departs outside MIA's trouble window (1 PM to 7 PM, when 49% of its 45 ground stops and delay programs started).
Moderate track record · 88 flights
Find United 2045 fares Opens this date on Aviasales
#3 · United 594
9:35 AM → 12:14 PM4h 39m nonstop
Local times, typical schedule. Last flown 2026-03-28.
87%
chance on time
On time (history)
88%
Cancelled
0.0%
Avg arrival delay
10 min
- Arrived on time 88% of the time (33 flights, Jun 2025 to May 2026).
- Never cancelled in 33 scheduled flights.
- Departs outside MIA's trouble window (1 PM to 7 PM, when 49% of its 45 ground stops and delay programs started).
- Short track record (33 flights), so its score leans on the airline's record at this hour.
Limited track record · 33 flights
Find United 594 fares Opens this date on Aviasales
#4 · United 2246
12:00 PM → 2:49 PM4h 49m nonstop
Local times, typical schedule. Last flown 2026-04-27.
84%
chance on time
On time (history)
86%
Cancelled
0.0%
Avg arrival delay
20 min
- Arrived on time 86% of the time (42 flights, Jun 2025 to May 2026).
- Never cancelled in 42 scheduled flights.
- Departs outside MIA's trouble window (1 PM to 7 PM, when 49% of its 45 ground stops and delay programs started).
- Lands 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 2246 fares Opens this date on Aviasales
#5 · United 2852
3:30 PM → 6:13 PM4h 44m nonstop
Local times, typical schedule. Last flown 2026-05-31.
83%
chance on time
On time (history)
86%
Cancelled
0.7%
Avg arrival delay
10 min
- Arrived on time 86% of the time (144 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (3 to 6 PM: 68% on time; Before 9 AM: 89%).
- Departs inside MIA's trouble window: 49% of its 45 ground stops and delay programs started between 1 PM and 7 PM.
- Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
Moderate track record · 144 flights
Find United 2852 fares Opens this date on Aviasales
#6 · Frontier 1279
5:50 AM → 8:57 AM4h 36m nonstop
Local times, typical schedule. Last flown 2026-05-31.
83%
chance on time
On time (history)
85%
Cancelled
1.5%
Avg arrival delay
20 min
- Arrived on time 85% of the time (325 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; 3 to 6 PM: 68%).
- Departs outside MIA's trouble window (1 PM to 7 PM, when 49% of its 45 ground stops and delay programs started).
- 58% of its delay minutes came from the plane arriving late from an earlier flight.
Strong track record · 325 flights
Find Frontier 1279 fares Opens this date on Aviasales
#7 · American 1219
8:35 AM → 11:16 AM4h 41m nonstop
Local times, typical schedule. Last flown 2026-04-06.
82%
chance on time
On time (history)
80%
Cancelled
0.0%
Avg arrival delay
8 min
- Arrived on time 80% of the time (30 flights, Jun 2025 to May 2026).
- Never cancelled in 30 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; 3 to 6 PM: 68%).
- Departs outside MIA's trouble window (1 PM to 7 PM, when 49% of its 45 ground stops and delay programs started).
Limited track record · 30 flights
Find American 1219 fares Opens this date on Aviasales
#8 · American 1739
9:00 AM → 11:25 AM4h 25m nonstop
Local times, typical schedule. Last flown 2026-05-31.
82%
chance on time
On time (history)
91%
Cancelled
0.0%
Avg arrival delay
8 min
- Arrived on time 91% of the time (11 flights, Jun 2025 to May 2026).
- Departs outside MIA's trouble window (1 PM to 7 PM, when 49% of its 45 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 1739 fares Opens this date on Aviasales
#9 · American 1747
9:18 AM → 11:47 AM4h 29m nonstop
Local times, typical schedule. Last flown 2026-05-20.
77%
chance on time
On time (history)
75%
Cancelled
0.0%
Avg arrival delay
11 min
- Arrived on time 75% of the time (75 flights, Jun 2025 to May 2026).
- Never cancelled in 76 scheduled flights.
- Departs outside MIA's trouble window (1 PM to 7 PM, when 49% of its 45 ground stops and delay programs started).
Moderate track record · 75 flights
Find American 1747 fares Opens this date on Aviasales
#10 · American 1737
8:30 PM → 10:53 PM4h 23m nonstop
Local times, typical schedule. Last flown 2026-05-31.
73%
chance on time
On time (history)
100%
Cancelled
0.0%
Avg arrival delay
2 min
- Arrived on time 100% of the time (11 flights, Jun 2025 to May 2026).
- Departs outside MIA's trouble window (1 PM to 7 PM, when 49% of its 45 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

Airlines on this route

Season-adjusted chance of operating and arriving on time.

United Airlines82%
954 flights · 83% on time as flown · 0.2% cancel
Frontier Airlines81%
347 flights · 82% on time as flown · 1.2% cancel
American Airlines75%
884 flights · 75% on time as flown · 0.9% cancel
Southwest Airlines66%
325 flights · 64% on time as flown · 0.2% cancel

On time by departure time

All airlines, scheduled local departure, Jun 2025 to May 2026.

Before 9 AM89%
796 flights · avg delay 11 min
9 AM to noon83%
372 flights · avg delay 11 min
Noon to 3 PM74%
223 flights · avg delay 17 min
3 to 6 PM68%
557 flights · avg delay 22 min
6 to 9 PM69%
408 flights · avg delay 24 min
After 9 PM70%
154 flights · avg delay 19 min

Best day: Tuesday (79%). Worst: Sunday (72%).

Smarter routing

Nearby airports that run more on time

FLL → DEN 82% chance on time
Fort Lauderdale Hollywood International Airport to Denver International Airport · 1,656 flights a year · 21 mi from your airports · yours: 77%
Rank flights Fares

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 aircraft43%
Airline (crew, maintenance, boarding)30%
Air traffic control and airport volume23%
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

MIA to DEN questions

What time of day is best to fly MIA to DEN?: Before 9 AM: 89% 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 MIA to DEN?: United, with a season-adjusted 82% chance of operating and arriving on time over 954 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 MIA to DEN?: July (65% on time); the best was October (85%), 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 MIA

Live status: FAA delays and ground stops

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