Carrier route record
UADEN→IDA
United Airlines · Denver to Idaho Falls
- Flights
- 184
- Period
- July 2025 to June 2026
- Share of route
- 11%
- Carriers
- 3
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with United Airlines.
United on DEN to IDA lands a B+, 2 points 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 about an hour on average. That is a workable record, not a spotless one. That rests on 184 flights, with a median arrival 6 minutes early.
The US average over the same twelve months is 77.6%, so there is little to separate United on DEN to IDA from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
79.8%
Arrivals under 15 minutes late, of 183 completed flights
Avg delay
62 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.81%
Whole route
80.3%
Every carrier on DEN to IDA, 1,737 flights
These figures cover 184 flights between July 2025 and June 2026. The median arrival is 6 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.
Carrier by carrier
United against every carrier on DEN to IDA
United flew 184 of the 1,737 flights on DEN to IDA, about 11% of it. Its 79.8% on time is about level with the route as a whole at 80.3%. Ranked by on-time rate it is number two of three carriers on the route, where the range runs from SkyWest at 80.4% to Allegiant at 72.2%. 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 Airlines | 1,535 | 80.4% | 67 min | 0.72% | B+ |
| United Airlines (this page)thin sample | 184 | 79.8% | 62 min | 0.00% | B+ |
| Allegiant Airthin sample | 18 | 72.2% | 37 min | 0.00% | C+ |
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 184 flights.
There are not enough flights in each departure window to split United's DEN to IDA record by time of day without the percentages moving on noise. The headline rate of 79.8% is the reliable figure here.
Across the year
United on DEN to IDA through the year
- Oct–Dec 202514 flights—
- Jan–Mar 202688 flights88.5%
- Apr–Jun 202682 flights72.0%
Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 79.8% on time across 184 flights.
Split by quarter, United on DEN to IDA logged 14 flights in Oct–Dec 2025, 88 flights in Jan–Mar 2026 and 82 flights in Apr–Jun 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 79.8% annual figure is the one to use.
Delay causes
Why United runs late on this route
One category carries most of the weight here. Late-arriving aircraft accounts for 67% of the 2,302 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.
- 67%Late-arriving aircraft
- 20%Carrier
- 14%National Airspace System
67% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 2,302 reported delay minutes here, that single category outweighs weather by 67 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 2,302 reported delay minutes.
Cancellations are rare at 0.00%, below the national 1.81% and low enough to earn the plus on the grade. Almost no flights are called off; the risk here is arriving late, not not arriving.
Connections and stage length
What a delay here costs
5.5% 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 about an hour, which a normal layover absorbs.
At 458 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 runs 80.3% on time across 184 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. 184 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 IDA
Put together: treat all of this as provisional. 184 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 79.8% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 183 completed flights over 12 months sit behind that.
Related
Where to go next
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.