Route reliability record
DEN→CYS
Denver to Cheyenne
- Flights
- 730
- Period
- September 2025 to August 2026
- Distance
- 90 mi
- Carriers
- 1
This route lands a B, 2 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That rests on 730 DEN to CYS flights, with a median arrival 7 minutes early.
The US average over the same twelve months is 77.3%, so there is little to separate this route from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
79.0%
Arrivals under 15 minutes late, of 719 completed flights
Avg delay
93 min
Across delayed arrivals only, not all flights
Cancelled
1.10%
National rate is 1.89%
Best carrier
SkyWest
79.0% on time across 730 flights
These figures cover 730 flights between September 2025 and August 2026. Beyond the headline rate, 8.9% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
Which airline is most reliable on DEN to CYS
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| SkyWest Airlines | 730 | 79.0% | 93 min | 1.10% | B |
Flight by flight
Flights on DEN to CYS
The flight numbers below flew this route at least 250 times in the period, busiest first. Each has its own record, with its schedule and delay causes.
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Departure window
The best time of day to leave
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 11 points, against half a point between the best and worst carrier.
- 5am–8am—
- 8am–11am2 flights—
- 11am–2pm364 flights84.4%
- 2pm–5pm1 flights—
- 5pm–8pm—
- 8pm–5am363 flights73.7%
Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.
The best window here is not the first bank but the 11am–2pm slot at 84.4% on time, ahead of 8pm–5am at 73.7%. Where the curve peaks mid-day rather than at dawn, the constraint is usually congestion at one end rather than the aircraft's own rotation. The 11am–2pm window is the busiest, with 364 flights scheduled in it.
Explore
Filter DEN to CYS by airline, time, month and day
Pick a breakdown and a carrier. The dashed mark on each row is the same slice for every US flight.
On DEN to CYS, the best departure window is 11am–2pm at 84.4% on time and the worst is 8pm–5am at 73.7%, a wide gap of 10.7 points. All US flights leaving 11am–2pm ran 78.3%.
- 5–8am—
- 8–11am—
- 11am–2pm84.4%
- 2–5pm—
- 5–8pm—
- 8pm–5am73.7%
best all US flightsScale 60% to 95%. Cells under 30 flights show a dash.
Across the year
When delays peak on this route
This route's year swings by 22 points from best month to worst, which is wide. An annual average tells you very little about the week you are actually flying, so read the strip rather than the headline if your dates are fixed.
June is the worst month at 73.3% on time, 22 points below November, the best at 94.9%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. December was the busiest month here, with 63 flights.
Across the week, Tuesday is the strongest day at 88.3% on time and Friday the weakest at 66.0%, a spread of 22 points.
Delay causes
Why this route gets delayed
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 14,000 reported delay minutes.
- 38%Carrier
- 33%Late-arriving aircraft
- 19%National Airspace System
- 10%Extreme weather
The largest share of delay minutes, 38%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 5,328 of the 14,000 delay minutes reported here. The split is drawn from 13,966 reported delay minutes.
Cancellations sit at 1.10% against a national 1.89%, which is ordinary. Diversions add another 0.41%.
Connections and stage length
What a delay here actually costs
8.9% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last an hour and a half, which a normal layover absorbs.
At 90 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 11am–2pm window matters as much as it does.
The return leg is a different operation and performs like one: it runs 85.9% on time across 730 flights, 7 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 7 points of difference.
One caution: this is a thin sample. 730 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
Work out the risk of missing a connection in CYS after this flight
What to do with this
Booking this route
Put together: treat all of this as provisional. 730 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 79.0% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 719 completed flights over 12 months sit behind that.
Common questions
DEN to CYS questions
How often is DEN to CYS delayed?
About one flight in five arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 21.0% of the 730 flights in this analysis, against 22.7% nationally. Delayed flights are late by an hour and a half on average.
How reliable is DEN to CYS compared with the rest of the country?
79.0% of flights arrive on time here against a national 77.3%, a difference of 2 points in its favour. That is worth a B on this site's grading scale.
What time of day has the fewest delays on DEN to CYS?
The 11am–2pm departure window is the strongest at 84.4% on time. The 8pm–5am window is the weakest at 73.7%, 11 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are June delays on DEN to CYS?
June is the weakest month at 73.3% on time, compared with 94.9% in November. Across the year that is 22 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
- CYS to DEN — the return legseparate record
- Denver International (DEN) delay statistics
- DEN to PHX, a related route75.6%
- DEN to SLC, a related route78.2%
- DEN to LAX, a related route78.7%
- SkyWest Airlines on-time record79.0%
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.05 million flight records
Direction matters. DEN to CYS and CYS to DEN are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
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Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.