ON TIMEBOARD
ATW Appleton / DEN Denver

ATW → DEN on time

Appleton (Appleton, WI) to Denver (Denver, CO). Every scheduled flight, September 2025 to August 2026.

On time
80%
arrived < 15 min late
Cancelled
1.2%
410 flights
Typical arrival
−9 min
median vs schedule
When late
+84 min
average delay
Flights / day
1
2 airlines

80% of flights from Appleton to Denver arrived on time over the past 12 months. That is about the typical U.S. route. 9% of flights arrived more than an hour late or not at all.

How late?

The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for ATW → DEN: when a flight was late, it was under 45 minutes late 44% of the time. About 1 in 14 flights landed an hour or more late, and 1 in 51 three hours or more; 1.2% were cancelled outright.

Share of all 410 scheduled flights, past 12 months, by arrival time against schedule.

By airline

AirlineFlightsOn timeCancelledTypical arrival1h+ lateAvg when lateOperated by
United Airlines36482%1.4%−9 min5.5%+81 minSkyWest 72%, United Airlines 28%
Allegiant Air46—————Allegiant Air

Airline = the name on the ticket. Regional flights (e.g. "Delta Connection") count under the ticketing airline, and the operator is listed.

Best time of day to fly

On-time rate by scheduled departure hour (local time at ATW). Delays build through the day as late planes knock on, so early flights usually do best.

40%70%100%8 a.m. departures: 82% on time (367 flights)828a9 a.m. departures: too few flights (1 flights)9a10 a.m. departures: too few flights10a11 a.m. departures: too few flights11anoon departures: too few flights12p1 p.m. departures: too few flights1p2 p.m. departures: too few flights2p3 p.m. departures: too few flights (12 flights)3p4 p.m. departures: too few flights (22 flights)4p
ATW → DEN, share of flights arriving on time, by departure hour. Hours with under 100 flights are greyed out.
82%+ on time76–82%68–76%under 68%too few flights

By airline and hour

DepartsUnited Airlines
8 a.m.82%

By month

Each calendar month pooled over 2023–2026. Best: September (89%). Worst: July (77%).

40%70%100%Jan: too few flights (94 flights)JanFeb: too few flights (85 flights)FebMar: 78% on time (101 flights)78MarApr: 87% on time (103 flights)87AprMay: 78% on time (108 flights)78MayJun: 84% on time (119 flights)84JunJul: 77% on time (141 flights)77JulAug: 81% on time (121 flights)81AugSep: 89% on time (115 flights)89SepOct: 81% on time (118 flights)81OctNov: too few flights (97 flights)NovDec: too few flights (97 flights)Dec

By day of week

DayFlightsOn timeCancelled
Monday68——
Tuesday52——
Wednesday52——
Thursday60——
Friday66——
Saturday52——
Sunday60——

Why flights were late

Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.

Airline (crew, maintenance, ops) 58%Air traffic & airport (NAS) 24%Severe weather 14%Late inbound plane 4%

Cancellations: weather 5

Month by month

Not enough months with data to draw a trend.

Questions

How often are flights from ATW to DEN on time?

80% of 410 scheduled flights from Appleton, WI to Denver, CO arrived within 15 minutes of schedule between September 2025 and August 2026. 1.2% were cancelled.

What month has the most delays from ATW to DEN?

July (77% on time). The best month is September (89%), over 2023–2026.

Related

Domestic flights by the airlines that report to the U.S. DOT, plus their regional partners. "On time" means arriving less than 15 minutes after schedule; cancelled and diverted flights count as not on time. Past performance is a guide, not a forecast. Method.