Carrier route record
UADEN→FCA
United Airlines · Denver to Kalispell
- Flights
- 807
- Period
- September 2025 to August 2026
- Share of route
- 80%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with United Airlines.
United on DEN to FCA 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 about an hour on average. That rests on 807 flights, with a median arrival 2 minutes early.
The US average over the same twelve months is 77.3%, so there is little to separate United on DEN to FCA from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
78.9%
Arrivals under 15 minutes late, of 798 completed flights
Avg delay
59 min
Across delayed arrivals only, not all flights
Cancelled
0.62%
National rate is 1.89%
Whole route
81.6%
Every carrier on DEN to FCA, 1,010 flights
These figures cover 807 flights between September 2025 and August 2026. The median arrival is 2 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
United against every carrier on DEN to FCA
United flew 807 of the 1,010 flights on DEN to FCA, most of the route. Its 78.9% on time is 3 points worse than the route as a whole, which runs 81.6%. Ranked by on-time rate it is last of two carriers on the route, where the range runs from SkyWest at 92.1% to United at 78.9%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
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 Airlinesthin sample | 203 | 92.1% | 51 min | 0.00% | A+ |
| United Airlines (this page) | 807 | 78.9% | 59 min | 0.62% | B+ |
Flight by flight
United flight numbers on DEN to FCA
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 United runs best on this route
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 807 flights.
- 5am–8am—
- 8am–11am—
- 11am–2pm392 flights81.4%
- 2pm–5pm68 flights81.8%
- 5pm–8pm326 flights75.2%
- 8pm–5am21 flights—
Scale runs 65% to 85%. Rows with fewer than 30 flights show a dash.
The best window here is not the first bank but the 2pm–5pm slot at 81.8% on time, ahead of 5pm–8pm at 75.2%. 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 392 flights scheduled in it.
Across the year
United on DEN to FCA through the year
December is the weak month at 63.2% on time, against 94.9% in April. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. August was the busiest month here, with 93 flights.
Across the week, Tuesday is the strongest day at 86.9% on time and Saturday the weakest at 74.2%, a spread of 13 points.
Arrival by arrival
How late United on DEN to FCA runs when it is late
The 168 late arrivals split 60 under half an hour, 56 between 30 and 60 minutes, and 52 an hour or more.
- 15+ min early126 flights15.8%
- Within 15 min504 flights63.2%
- 15–29 min late60 flights7.5%
- 30–59 min late56 flights7.0%
- 1–2 hours late37 flights4.6%
- 2+ hours late15 flights1.9%
Scale runs 0% to 100%.
Share of 798 completed flights by arrival against schedule.
23 of 155 late departures made up the time and arrived on time, 15% of them. 36 flights left on time and still arrived late.
The worst days
Worst days for United on DEN to FCA
The latest arrival of the period was on 12 November 2025, 12 hours 19 minutes behind schedule; most of its delay minutes were filed as extreme weather. On three of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 12 November 2025 | 12 hours 19 minutes | Extreme weather |
| 16 March 2026 | 5 hours 2 minutes | Late-arriving aircraft |
| 21 August 2026 | 4 hours 4 minutes | Late-arriving aircraft |
| 8 August 2026 | 3 hours 50 minutes | Carrier |
| 19 December 2025 | 3 hours 31 minutes | Late-arriving aircraft |
Delay causes
Why United runs late on this route
Late-arriving aircraft accounts for 50% of the 9,937 delay minutes carriers reported here, and the remaining four split what is left.
- 50%Late-arriving aircraft
- 30%Carrier
- 13%National Airspace System
- 7%Extreme weather
50% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 9,937 reported delay minutes here, that single category outweighs weather by 7 to one. The split is drawn from 9,937 reported delay minutes.
Cancellations are rare at 0.62%, below the national 1.89% 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
6.5% 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 about an hour, which a normal layover absorbs.
The 752 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.
The return leg is a different operation and performs like one: it runs 83.2% on time across 807 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.
One caution: this is a thin sample. 807 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 United on DEN to FCA
Put together: treat all of this as provisional. 807 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 78.9% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 798 completed flights over 12 months sit behind that.
Related
Where to go next
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.