Best Time to Fly ATW to DEN: On-Time Stats by Hour & Airline
Appleton International → Denver International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 81.6% of Appleton (ATW) to Denver (DEN) flights arrived on time (411 scheduled flights). That is 3.9 points above the national average of 77.6%.
United Airlines was the most punctual of the 3 airlines on the route at 88.7%, while Allegiant Air trailed at 74.5%.
September has been the best month (91% on time) and Thursday the weakest day of the week (76%).
1.0% of flights were cancelled, versus 1.8% nationally.
ATW 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 |
|---|---|---|---|---|
| United Airlines | 88.7% | 50 min | 0.0% | 71 |
| SkyWest Airlines | 81.0% | 85 min | 1.4% | 293 |
| Allegiant Air | 74.5% | 84 min | 0.0% | 47 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly ATW to DEN
On-time arrival % by scheduled departure hour (local time), 852 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | Limited data | 4 | |
| 8am–9am | 81.9% | 0.8% | 729 |
| 10am–11am | Limited data | 8 | |
| 1pm–2pm | 68.8% | 0.0% | 32 |
| 2pm–3pm | Limited data | 5 | |
| 3pm–4pm | Limited data | 20 | |
| 4pm–5pm | 55.8% | 0.0% | 44 |
| 5pm–6pm | Limited data | 10 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on ATW 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) | Limited data | 13 | ||
| Christmas & New Year (Dec 20 - Jan 3) | Limited data | 30 | ||
| Summer peak (Jun 15 - Aug 15) | 78.5% | -2.4 pts | 0.0% | 186 |
| All other days | 80.8% | — | 0.8% | 623 |
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).