Carrier route record
OODEN→BIL
SkyWest Airlines · Denver to Billings
- Flights
- 1,049
- Period
- September 2025 to August 2026
- Share of route
- 59%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with SkyWest Airlines.
SkyWest on DEN to BIL lands a B, 4 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 a little over an hour on average. That rests on 1,049 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 SkyWest on DEN to BIL from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
81.1%
Arrivals under 15 minutes late, of 1,030 completed flights
Avg delay
71 min
Across delayed arrivals only, not all flights
Cancelled
1.14%
National rate is 1.89%
Whole route
80.3%
Every carrier on DEN to BIL, 1,774 flights
These figures cover 1,049 flights between September 2025 and August 2026. The median arrival is 7 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Carrier by carrier
SkyWest against every carrier on DEN to BIL
SkyWest flew 1,049 of the 1,774 flights on DEN to BIL, most of the route. Its 81.1% on time is about level with the route as a whole at 80.3%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from SkyWest at 81.1% to United at 79.2%.
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 (this page) | 1,049 | 81.1% | 71 min | 1.14% | B |
| United Airlines | 725 | 79.2% | 68 min | 0.14% | B+ |
Flight by flight
SkyWest flight numbers on DEN to BIL
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Departure window
When SkyWest runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 14 points, against half a point between the best and worst carrier.
- 5am–8am3 flights—
- 8am–11am359 flights89.0%
- 11am–2pm145 flights82.5%
- 2pm–5pm323 flights75.4%
- 5pm–8pm—
- 8pm–5am219 flights75.6%
Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.
Book the morning departure. Flights leaving between 8am–11am arrive on time 89.0% of the time, against 75.4% for the afternoon window. That is 14 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8am–11am window is the busiest, with 359 flights scheduled in it.
Across the year
SkyWest on DEN to BIL through the year
August is the worst month at 66.1% on time, 29 points below October, the best at 94.6%. 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. August was the busiest month here, with 119 flights.
Across the week, Saturday is the strongest day at 88.5% on time and Sunday the weakest at 75.7%, a spread of 13 points.
Arrival by arrival
How late SkyWest on DEN to BIL runs when it is late
SkyWest on DEN to BIL often beats the schedule: 275 of 1,030 completed flights, 27%, arrived 15 minutes or more early. The 195 late arrivals split 58 under half an hour, 79 between 30 and 60 minutes, and 58 an hour or more.
- 15+ min early275 flights26.7%
- Within 15 min560 flights54.4%
- 15–29 min late58 flights5.6%
- 30–59 min late79 flights7.7%
- 1–2 hours late35 flights3.4%
- 2+ hours late23 flights2.2%
Scale runs 0% to 100%.
Share of 1,030 completed flights by arrival against schedule.
25 of 175 late departures made up the time and arrived on time, 14% of them. 45 flights left on time and still arrived late.
The worst days
Worst days for SkyWest on DEN to BIL
The latest arrival of the period was on 11 August 2026, 17 hours 7 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. Three of the five worst days fell in August 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 11 August 2026 | 17 hours 7 minutes | Late-arriving aircraft |
| 10 July 2026 | 12 hours 47 minutes | Late-arriving aircraft |
| 3 July 2026 | 11 hours 2 minutes | Extreme weather |
| 24 August 2026 | 10 hours 39 minutes | Late-arriving aircraft |
| 23 August 2026 | 6 hours 40 minutes | Late-arriving aircraft |
Delay causes
Why SkyWest runs late on this route
Late-arriving aircraft accounts for 47% of the 14,000 delay minutes carriers reported here, and the remaining four split what is left.
- 47%Late-arriving aircraft
- 32%Carrier
- 11%National Airspace System
- 11%Extreme weather
47% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 14,000 reported delay minutes here, that single category outweighs weather by 4 to one. The split is drawn from 13,795 reported delay minutes.
The practical consequence: the 8am–11am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 89.0% on time here.
Cancellations sit at 1.14% against a national 1.89%, which is ordinary. Diversions add another 0.67%.
Connections and stage length
What a delay here costs
5.6% 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 a little over an hour, which a normal layover absorbs.
At 455 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 8am–11am window matters as much as it does.
The return leg runs 81.3% on time across 1,049 flights, within half a point of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
One caution: this is a thin sample. 1,049 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.
What to do with this
Booking SkyWest on DEN to BIL
Put together: treat all of this as provisional. 1,049 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 81.1% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 1,030 completed flights over 12 months sit behind that.
Related
Where to go next
- DEN to BIL, every carrier
- SkyWest on BIL to DEN, the return leg
- United Airlines on DEN to BIL79.2%
- SkyWest Airlines network-wide record
- Denver International (DEN) delay statistics
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.05 million flight records
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.