Best Time to Fly DEN to MKE: On-Time Stats by Hour & Airline
Denver International → General Mitchell International
Data through July 2026 · Last updated October 18, 2026
2,319 flights were scheduled from Denver (DEN) to Milwaukee (MKE) in the last 12 months, and 76.6% of those that flew arrived on time, 1.0 points below the US average of 77.6%.
Frontier Airlines was the most punctual of the 4 airlines on the route at 90.4%, while Southwest Airlines trailed at 73.0%.
October has been the best month (87% on time) and Friday the weakest day of the week (73%).
0.4% of flights were cancelled, versus 1.8% nationally.
DEN to MKE on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Frontier Airlines | 90.4% | 51 min | 0.0% | 52 |
| United Airlines | 82.8% | 61 min | 0.0% | 713 |
| SkyWest Airlines | 74.4% | 83 min | 0.3% | 308 |
| Southwest Airlines | 73.0% | 54 min | 0.6% | 1,246 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly DEN to MKE
On-time arrival % by scheduled departure hour (local time), 4,753 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | Limited data | 5 | |
| 6am–7am | Limited data | 24 | |
| 7am–8am | 89.9% | 0.0% | 119 |
| 8am–9am | 90.4% | 0.3% | 294 |
| 9am–10am | 91.1% | 0.9% | 317 |
| 10am–11am | 82.3% | 0.3% | 703 |
| 11am–12pm | 82.0% | 0.5% | 224 |
| 12pm–1pm | 86.4% | 1.1% | 89 |
| 1pm–2pm | 84.8% | 0.4% | 520 |
| 2pm–3pm | 77.5% | 0.0% | 174 |
| 3pm–4pm | 73.2% | 0.4% | 229 |
| 4pm–5pm | 75.8% | 2.1% | 93 |
| 5pm–6pm | 65.2% | 0.1% | 745 |
| 6pm–7pm | 65.2% | 0.5% | 401 |
| 7pm–8pm | 51.0% | 1.1% | 262 |
| 8pm–9pm | 60.1% | 0.7% | 451 |
| 9pm–10pm | 64.8% | 1.1% | 92 |
| 10pm–11pm | Limited data | 11 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on DEN to MKE
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 82.8% | +5.4 pts | 1.1% | 88 |
| Christmas & New Year (Dec 20 - Jan 3) | 76.2% | -1.2 pts | 0.0% | 172 |
| Summer peak (Jun 15 - Aug 15) | 64.8% | -12.6 pts | 0.5% | 1,017 |
| All other days | 77.4% | — | 0.5% | 3,476 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).