Carrier route record
UABZN→DEN
United Airlines · Bozeman to Denver
- Flights
- 1,163
- Period
- July 2025 to June 2026
- Share of route
- 43%
- Carriers
- 3
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with United Airlines.
United on BZN to DEN lands a B+, about a point better than the national rate of 77.6%. 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 is a workable record, not a spotless one. That rests on 1,163 flights. The strongest carrier on the route with a full sample, SkyWest Airlines, flew 393 at 77.8% on time.
The US average over the same twelve months is 77.6%, so there is little to separate United on BZN to DEN from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
78.8%
Arrivals under 15 minutes late, of 1,152 completed flights
Avg delay
73 min
Across delayed arrivals only, not all flights
Cancelled
0.43%
National rate is 1.81%
Whole route
76.9%
Every carrier on BZN to DEN, 2,730 flights
These figures cover 1,163 flights between July 2025 and June 2026. Beyond the headline rate, 8.3% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Carrier by carrier
United against every carrier on BZN to DEN
United flew 1,163 of the 2,730 flights on BZN to DEN, about 43% of it. Its 78.8% on time is 2 points better than the route as a whole, which runs 76.9%. Ranked by on-time rate it is first of three carriers on the route, where the range runs from United at 78.8% to Southwest at 74.6%.
The two carriers here are closely matched: 3 points separate the best from the worst. At that spread, schedule and price are better tie-breakers than reliability. Sample sizes are shown so you can see which rows are worth weighing.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| United Airlines (this page) | 1,163 | 78.8% | 73 min | 0.43% | B+ |
| SkyWest Airlines | 393 | 77.8% | 71 min | 1.27% | B |
| Southwest Airlines | 1,174 | 74.6% | 57 min | 0.26% | C+ |
No carrier stands out. SkyWest tops the table at 77.8%, 3 points clear of the bottom, which is inside the range this kind of sample moves year to year.
Flight by flight
United flight numbers on BZN to DEN
Departure window
When United runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 20 points, against 3 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am364 flights90.6%
- 8am–11am131 flights87.8%
- 11am–2pm—
- 2pm–5pm668 flights70.6%
- 5pm–8pm—
- 8pm–5am—
Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 90.6% of the time, against 70.6% for the afternoon window. That is 20 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 2pm–5pm window is the busiest, with 668 flights scheduled in it.
Across the year
United on BZN to DEN through the year
July is the worst month at 58.8% on time, 36 points below April, the best at 95.0%. 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. June was the busiest month here, with 120 flights.
Across the week, Tuesday is the strongest day at 81.6% on time and Friday the weakest at 75.4%. 6 points is a smaller lever than departure hour, but it is free.
Delay causes
Why United runs late on this route
One category carries most of the weight here. National Airspace System accounts for 51% of the 18,000 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 51%National Airspace System
- 31%Late-arriving aircraft
- 14%Carrier
- 5%Extreme weather
51% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 8,985 minutes out of 18,000, against a national NAS share of 21%. The split is drawn from 17,697 reported delay minutes.
The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 90.6% on time here.
Cancellations are rare at 0.43%, below the national 1.81% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and stage length
What a delay here costs
8.3% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says 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.
The 524 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The return leg is a different operation and performs like one: it runs 82.3% on time across 1,163 flights, 4 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 4 points of difference.
The sample behind these figures is 1,163 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
What to do with this
Booking United on BZN to DEN
Put together: the calendar is the biggest lever here, not the carrier or the hour. April runs 95.0% on time and July 58.8%, a swing of 36 points. If the dates move at all, move them out of July before you think about anything else. 1,152 completed flights over 12 months sit behind that.
Related
Where to go next
- BZN to DEN, every carrier
- United on DEN to BZN, the return leg
- SkyWest Airlines on BZN to DEN77.8%
- Southwest Airlines on BZN to DEN74.6%
- United Airlines network-wide record
- Denver International (DEN) delay statistics
- The best time of day to fly, according to 7.04 million flight records
- Connecting flights: how much buffer the data says you need
Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.