Carrier route record
UADEN→MRY
United Airlines · Denver to Monterey
- Flights
- 104
- 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 DEN to MRY earns an F+, which is as low as this site's scale goes for a reason. Only 49.5% of flights arrive inside the 15-minute window, 28 points worse than the national rate of 77.3%. Late arrivals average a little over an hour. Treat any tight connection here as a coin flip. That rests on 104 flights, with a median arrival 15 minutes late.
The national on-time rate over the same period is 77.3%, so United on DEN to MRY runs 28 points behind the country as a whole. Across a thousand flights that is about 278 extra late arrivals.
Key figures
On time
49.5%
Arrivals under 15 minutes late, of 103 completed flights
Avg delay
76 min
Across delayed arrivals only, not all flights
Cancelled
0.96%
National rate is 1.89%
Whole route
79.5%
Every carrier on DEN to MRY, 726 flights
These figures cover 104 flights between September 2025 and August 2026. Beyond the headline rate, 22.3% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
United against every carrier on DEN to MRY
United flew 104 of the 726 flights on DEN to MRY, about 14% of it. Its 49.5% on time is 30 points worse than the route as a whole, which runs 79.5%. Ranked by on-time rate it is last of two carriers on the route, where the range runs from SkyWest at 84.5% to United at 49.5%.
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 | 622 | 84.5% | 56 min | 0.00% | B+ |
| United Airlines (this page)thin sample | 104 | 49.5% | 76 min | 0.96% | F+ |
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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 104 flights.
There are not enough flights in each departure window to split United's DEN to MRY record by time of day without the percentages moving on noise. The headline rate of 49.5% is the reliable figure here.
Across the year
United on DEN to MRY through the year
- Apr–Jun 202642 flights51.2%
- Jul–Sep 202662 flights48.4%
Scale runs 40% to 55%.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 49.5% on time across 104 flights.
Split by quarter, United on DEN to MRY logged 42 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 49.5% annual figure is the one to use.
Arrival by arrival
How late United on DEN to MRY runs when it is late
The 52 late arrivals split 15 under half an hour, 14 between 30 and 60 minutes, and 23 an hour or more.
- 15+ min early7 flights6.8%
- Within 15 min44 flights42.7%
- 15–29 min late15 flights14.6%
- 30–59 min late14 flights13.6%
- 1–2 hours late14 flights13.6%
- 2+ hours late9 flights8.7%
Scale runs 0% to 100%.
Share of 103 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 45 departures that left 15 minutes late or more, only 2 made it up before arrival. In the other direction, 9 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at MRY.
The worst days
Worst days for United on DEN to MRY
The latest arrival of the period was on 15 August 2026, 5 hours 37 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. Four of the five worst days fell in August 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 15 August 2026 | 5 hours 37 minutes | Late-arriving aircraft |
| 21 August 2026 | 4 hours 43 minutes | Late-arriving aircraft |
| 22 August 2026 | 4 hours 25 minutes | Carrier |
| 24 August 2026 | 3 hours 9 minutes | Late-arriving aircraft |
| 8 June 2026 | 2 hours 35 minutes | Late-arriving aircraft |
Delay causes
Why United runs late on this route
Late-arriving aircraft accounts for 67% of the 3,941 delay minutes carriers reported here, and the remaining four split what is left.
- 67%Late-arriving aircraft
- 22%Carrier
- 10%National Airspace System
67% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 3,941 reported delay minutes here, that single category outweighs weather by 67 to one. The split is drawn from 3,941 reported delay minutes.
Cancellations sit at 0.96% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and stage length
What a delay here costs
22.3% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
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 93.1% on time across 103 flights, 44 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 44 points of difference.
One caution: this is a thin sample. 104 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 MRY
Put together: treat all of this as provisional. 104 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 49.5% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 103 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.