Denver (DEN) to Milwaukee (MKE): On-Time Performance
Data through July 2026
Denver (DEN) to Milwaukee (MKE) effectively runs on two schedules. In October 2024, 87% of arrivals were on time; in June 2025 that fell to 54% — a 34-point seasonal swing. Across the full period the route averages 75% on-time against a national 78%. Morning departures also hold up better than evening ones (86% vs 62%), which matters most in the rough months.
- On-time
- 75%
- arrived <15 min late
- Avg delay
- 17 min
- completed flights
- Cancelled
- 0.5%
- Flights/day
- 6.4
- last 12 months
- Duration
- 2h 22m
- scheduled
- Distance
- 896 mi
Best airline from DEN to MKE
4 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Frontier Airlinesmost reliable | 80% | 12 min | 0.5% | 190 |
| United Airlines | 77% | 16 min | 0.2% | 1,313 |
| SkyWest Airlines | 74% | 20 min | 0.5% | 861 |
| Southwest Airlines | 73% | 18 min | 0.6% | 2,672 |
Monthly on-time trend
Best time to fly from DEN to MKE
Aim for departures around 5 a.m. (94% on-time); avoid 7 p.m. departures (51%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 74% | 18 min |
| Tuesday | 77% | 18 min |
| Wednesday | 77% | 16 min |
| Thursday | 73% | 17 min |
| Friday | 73% | 20 min |
| Saturdaybest | 79% | 14 min |
| Sunday | 73% | 17 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft47%
- Airline operations35%
- National airspace system16%
- Weather3%
Frequently asked questions
- How often are flights from DEN to MKE delayed?
- 25% of DEN–MKE flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 17 minutes.
- Which airline is most reliable from DEN to MKE?
- Frontier Airlines has the best on-time record on this route at 80%, based on 190 flights. 4 airlines flew DEN–MKE frequently enough to compare in this period.
- What is the best time of day to fly from DEN to MKE?
- Departures around 5 a.m. have the best record (94% on-time), while departures around 7 p.m. have the worst (51%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from DEN to MKE?
- The scheduled DEN–MKE flight time averages 2h 22m over 896 miles. Actual arrival times vary — flights on this route land 15+ minutes late 25% of the time.
- How often are DEN to MKE flights cancelled?
- 0.5% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from DEN to MKE?
- June 2025 was the roughest month in this dataset, with only 54% of arrivals on time. The best was October 2024 at 87%. If your dates are flexible, that 34-point gap is worth planning around.
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Based on 5,036 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.