ON TIMEBOARD

COD → DEN on time

Yellowstone (Cody, WY) to Denver (Denver, CO). Every scheduled flight, September 2025 to August 2026.

On time
69%
arrived < 15 min late
Cancelled
1.2%
934 flights
Typical arrival
−5 min
median vs schedule
When late
+102 min
average delay
Flights / day
3
1 airline

69% of flights from Cody to Denver arrived on time over the past 12 months. That is worse than the typical U.S. route. The 6 a.m. departures ran on time 84% of the time; the 5 p.m. ones 46%. 16% 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 COD → DEN: when a flight was late, it was under 45 minutes late 43% of the time. About 1 in 7 flights landed an hour or more late, and 1 in 20 three hours or more; 1.2% were cancelled outright.

Share of all 934 scheduled flights, past 12 months, by arrival time against schedule.

By airline

AirlineFlightsOn timeCancelledTypical arrival1h+ lateAvg when lateOperated by
United Airlines93469%1.2%−5 min13.6%+102 minSkyWest

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 COD). Delays build through the day as late planes knock on, so early flights usually do best.

40%70%100%5 a.m. departures: 82% on time (103 flights)825a6 a.m. departures: 84% on time (135 flights)846a7 a.m. departures: too few flights7a8 a.m. departures: 67% on time (127 flights)678a9 a.m. departures: too few flights9a10 a.m. departures: too few flights (78 flights)10a11 a.m. departures: too few flights11anoon departures: too few flights12p1 p.m. departures: 69% on time (343 flights)691p2 p.m. departures: too few flights (21 flights)2p3 p.m. departures: too few flights3p4 p.m. departures: too few flights4p5 p.m. departures: 46% on time (104 flights)465p6 p.m. departures: too few flights (23 flights)6p
COD → 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

Last flight of the day

On COD → DEN, each airline's last flight of the day was cancelled 1.7% of the time, against 0.9% for its earlier flights (1.9× as often). It arrived 3+ hours late 4.1% of the time (earlier flights: 5.6%). It matters more than the numbers suggest. Miss an earlier flight and there's another one that evening; miss the last one and you're usually waiting until morning.

AirlineLast departureLast: cancelledLast: 3h+ lateEarlier: cancelledNext morning
United Airlines5:55 p.m.1.7%4.1%0.9%first flight 5:15 a.m.

Last flight = the airline's last scheduled departure on this route that day, on days it flies the route at least twice; past 12 months. Times are typical scheduled times over the latest three months.

If you need to be in DEN tonight, book an earlier flight so there's a backup if it's cancelled.

By month

Each calendar month pooled over 2023–2026. Best: December (78%). Worst: June (61%).

40%70%100%Jan: 70% on time (186 flights)70JanFeb: 65% on time (170 flights)65FebMar: 75% on time (186 flights)75MarApr: 76% on time (180 flights)76AprMay: 69% on time (221 flights)69MayJun: 61% on time (295 flights)61JunJul: 72% on time (368 flights)72JulAug: 64% on time (360 flights)64AugSep: 73% on time (256 flights)73SepOct: 78% on time (186 flights)78OctNov: 71% on time (178 flights)71NovDec: 78% on time (186 flights)78Dec

By day of week

DayFlightsOn timeCancelled
Monday13472%1.5%
Tuesday13279%0.8%
Wednesday13270%0.8%
Thursday13166%0.8%
Friday13269%3.0%
Saturday14066%0.0%
Sunday13365%1.5%

Why flights were late

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

Airline (crew, maintenance, ops) 40%Late inbound plane 31%Air traffic & airport (NAS) 15%Severe weather 14%

Cancellations: weather 10 · air traffic/airport 1

Month by month

50%75%100%Sep 2023Jan 2024Jan 2025Jan 2026Jul 2024: 80% on time, 0.0% cancelledAug 2024: 72% on time, 0.0% cancelledJul 2025: 68% on time, 2.4% cancelledAug 2025: 63% on time, 1.6% cancelledJul 2026: 69% on time, 0.8% cancelledAug 2026: 59% on time, 3.2% cancelled
Share of flights on time, by month (hover a point for cancellations)
COD → DEN, monthly on-time and cancellation rate.

Flight numbers on this route

Regular flights with at least 120 scheduled trips in the past year. Sorted by departure time.

FlightDepartsFlightsOn timeCancelledTypical arrivalOperated by
UA 50896:30 a.m.31877%0.9%−10 minSkyWest
UA 50991:54 p.m.34068%1.2%−8 minSkyWest

Worst days in the past year

DateFlightsOn timeCancelled
Sep 7, 202540%0
Aug 14, 202640%2
Jun 25, 202640%0
May 21, 202630%0
Sep 12, 202530%0

Questions

How often are flights from COD to DEN on time?

69% of 934 scheduled flights from Cody, WY to Denver, CO arrived within 15 minutes of schedule between September 2025 and August 2026. 1.2% were cancelled.

What is the best time of day to fly COD to DEN?

Flights scheduled to leave at 6 a.m. were the most reliable (84% on time). The 5 p.m. departures were the least (46%).

What month has the most delays from COD to DEN?

June (61% on time). The best month is December (78%), over 2023–2026.

Is the last flight of the day from COD to DEN more likely to be cancelled?

Yes. Each airline's last COD–DEN flight of the day was cancelled 1.7% of the time over the past year, against 0.9% for its earlier flights. If the last flight is cancelled, the next one is usually the following morning.

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.