Carrier route record
UAMRY→DEN
United Airlines · Monterey to Denver
- Flights
- 103
- Period
- September 2025 to August 2026
- Share of route
- 14%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with United Airlines.
United on MRY to DEN earns an A+. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 16 points better than the national rate of 77.3%. When something does go wrong the average delay runs close to two hours. That rests on 103 flights, with a median arrival 13 minutes early.
Set against the rest of the country, United's MRY to DEN record is 16 points better than the US average of 77.3%. That gap is worth roughly 158 fewer late arrivals for every thousand flights.
Key figures
On time
93.1%
Arrivals under 15 minutes late, of 102 completed flights
Avg delay
122 min
Across delayed arrivals only, not all flights
Cancelled
0.97%
National rate is 1.89%
Whole route
92.9%
Every carrier on MRY to DEN, 729 flights
These figures cover 103 flights between September 2025 and August 2026. The median arrival is 13 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 MRY to DEN
United flew 103 of the 729 flights on MRY to DEN, about 14% of it. Its 93.1% on time is about level with the route as a whole at 92.9%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from United at 93.1% to SkyWest at 92.9%.
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 | 103 | 93.1% | 122 min | 0.97% | A+ |
| SkyWest Airlines | 626 | 92.9% | 85 min | 0.16% | A+ |
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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 103 flights.
There are not enough flights in each departure window to split United's MRY to DEN record by time of day without the percentages moving on noise. The headline rate of 93.1% is the reliable figure here.
Across the year
United on MRY to DEN through the year
- Apr–Jun 202641 flights90.0%
- Jul–Sep 202662 flights95.2%
Scale runs 80% to 100%.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 93.1% on time across 103 flights.
Split by quarter, United on MRY to DEN logged 41 flights in Apr–Jun 2026 and 62 flights in Jul–Sep 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 93.1% annual figure is the one to use.
Arrival by arrival
How late United on MRY to DEN runs when it is late
United on MRY to DEN often beats the schedule: 44 of 102 completed flights, 43%, arrived 15 minutes or more early. The 7 late arrivals split 2 under half an hour, 3 between 30 and 60 minutes, and 2 an hour or more.
- 15+ min early44 flights43.1%
- Within 15 min51 flights50.0%
- 15–29 min late2 flights2.0%
- 30–59 min late3 flights2.9%
- 1–2 hours late1 flights1.0%
- 2+ hours late1 flights1.0%
Scale runs 0% to 100%.
Share of 102 completed flights by arrival against schedule.
Only 7 of 102 completed flights left 15 minutes late or more, too few to say how often the time is made up.
The worst days
Worst days for United on MRY to DEN
The latest arrival of the period was on 13 June 2026, 9 hours 34 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On four of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 13 June 2026 | 9 hours 34 minutes | Late-arriving aircraft |
| 29 May 2026 | 1 hour 45 minutes | Carrier |
| 28 June 2026 | 47 minutes | Carrier |
| 30 July 2026 | 44 minutes | Carrier |
| 18 July 2026 | 34 minutes | Carrier |
Delay causes
Why United runs late on this route
Late-arriving aircraft accounts for 65% of the 857 delay minutes carriers reported here, and the remaining four split what is left.
- 65%Late-arriving aircraft
- 29%Carrier
- 6%National Airspace System
65% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 857 reported delay minutes here, that single category outweighs weather by 65 to one. The split is drawn from 857 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 93.1% on time here.
Cancellations sit at 0.97% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and stage length
What a delay here costs
Badly late arrivals are rare here: only 2.0% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
The 959 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 49.5% on time across 104 flights, 44 points below 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 44 points of difference.
One caution: this is a thin sample. 103 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 MRY to DEN
Put together: treat all of this as provisional. 103 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 93.1% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 102 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.