Carrier route record
UAIDA→DEN
United Airlines · Idaho Falls to Denver
- 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 IDA to DEN lands a B+, 3 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 close to two hours on average. That is a workable record, not a spotless one. That rests on 184 flights, with a median arrival 19 minutes early.
The US average over the same twelve months is 77.6%, so there is little to separate United on IDA 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
80.3%
Arrivals under 15 minutes late, of 183 completed flights
Avg delay
103 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.81%
Whole route
79.2%
Every carrier on IDA to DEN, 1,738 flights
These figures cover 184 flights between July 2025 and June 2026. The median arrival is 19 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 IDA to DEN
United flew 184 of the 1,738 flights on IDA to DEN, about 11% of it. Its 80.3% on time is about level with the route as a whole at 79.2%. Ranked by on-time rate it is first of three carriers on the route, where the range runs from United at 80.3% to Allegiant at 50.0%. 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 |
|---|---|---|---|---|---|
| United Airlines (this page)thin sample | 184 | 80.3% | 103 min | 0.00% | B+ |
| SkyWest Airlines | 1,536 | 79.4% | 91 min | 0.78% | B+ |
| Allegiant Airthin sample | 18 | 50.0% | 64 min | 5.56% | F− |
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 IDA to DEN record by time of day without the percentages moving on noise. The headline rate of 80.3% is the reliable figure here.
Across the year
United on IDA to DEN through the year
- Oct–Dec 202514 flights—
- Jan–Mar 202688 flights81.8%
- Apr–Jun 202682 flights77.8%
Scale runs 70% to 85%. 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 80.3% on time across 184 flights.
Split by quarter, United on IDA to DEN 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 80.3% annual figure is the one to use.
Delay causes
Why United runs late on this route
One category carries most of the weight here. Carrier accounts for 42% of the 3,699 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.
- 42%Carrier
- 33%Late-arriving aircraft
- 25%National Airspace System
- 0%Extreme weather
The largest share of delay minutes, 42%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 1,555 of the 3,699 delay minutes reported here. The split is drawn from 3,699 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
6.6% 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 close to two hours, 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 2pm–5pm window matters as much as it does.
The return leg runs 79.8% 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 IDA to DEN
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 80.3% 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.