Best Time to Fly MKE to DEN: On-Time Stats by Hour & Airline
General Mitchell International → Denver International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 78.9% of Milwaukee (MKE) to Denver (DEN) flights arrived on time (2,322 scheduled flights). That is 1.3 points above the national average of 77.6%.
Southwest Airlines was the most punctual of the 4 airlines on the route at 80.1%, while Frontier Airlines trailed at 73.1%.
October has been the best month (87% on time) and Wednesday the weakest day of the week (79%).
0.4% of flights were cancelled, versus 1.8% nationally.
MKE to DEN 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 |
|---|---|---|---|---|
| Southwest Airlines | 80.1% | 56 min | 0.6% | 1,248 |
| SkyWest Airlines | 78.2% | 55 min | 0.3% | 308 |
| United Airlines | 77.6% | 62 min | 0.1% | 714 |
| Frontier Airlines | 73.1% | 75 min | 0.0% | 52 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly MKE to DEN
On-time arrival % by scheduled departure hour (local time), 4,772 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 96.9% | 0.6% | 512 |
| 6am–7am | 95.7% | 0.0% | 116 |
| 7am–8am | 92.0% | 0.0% | 151 |
| 8am–9am | 80.9% | 0.4% | 752 |
| 9am–10am | 91.2% | 0.0% | 125 |
| 10am–11am | 86.8% | 0.2% | 575 |
| 11am–12pm | 84.5% | 0.0% | 174 |
| 12pm–1pm | 81.6% | 0.0% | 125 |
| 1pm–2pm | 93.3% | 0.8% | 122 |
| 2pm–3pm | 78.7% | 0.5% | 556 |
| 3pm–4pm | 74.9% | 1.1% | 186 |
| 4pm–5pm | 73.7% | 0.3% | 328 |
| 5pm–6pm | 67.6% | 0.6% | 361 |
| 6pm–7pm | 62.1% | 0.8% | 265 |
| 7pm–8pm | 66.2% | 0.9% | 227 |
| 8pm–9pm | 65.9% | 2.2% | 180 |
| 9pm–10pm | Limited data | 11 | |
| 10pm–11pm | Limited data | 6 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on MKE to DEN
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) | 66.7% | -15.5 pts | 1.1% | 88 |
| Christmas & New Year (Dec 20 - Jan 3) | 74.3% | -7.9 pts | 0.6% | 172 |
| Summer peak (Jun 15 - Aug 15) | 76.9% | -5.2 pts | 0.5% | 1,016 |
| All other days | 82.2% | — | 0.5% | 3,496 |
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).