Flight number record
UA 352
United Airlines · Montrose to Denver
- Route
- MTJ → DEN
- Departs
- 13:30
- Flights
- 308
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 352, check with United Airlines.
UA 352 lands a B+, 4 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 an hour and a half on average. That rests on 308 flights, with a median arrival 15 minutes early.
Key figures
On time
81.2%
Arrivals under 15 minutes late, of 303 completed flights
Avg delay
83 min
Across delayed arrivals only, not all flights
Cancelled
0.97%
National rate is 1.89%
1 hour+ late
7.6%
National rate is 8.3%
These figures cover 308 flights between September 2025 and August 2026. The median arrival is 15 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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Schedule
When UA 352 flies
UA 352 flies MTJ to DEN without a single fixed slot. Its most common scheduled departure was 13:30, used on 82 of 308 flights, with 13:40 (67 flights) and 13:32 (58 flights) next.
- Departs 13:3082 flights26.6%
- Departs 13:4067 flights21.8%
- Departs 13:3258 flights18.8%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 13:30 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and UA 352 runs 3 points better at 81.2%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
UA 352 next to MTJ to DEN
Every carrier on MTJ to DEN combined arrived on time 80.4% of the time across 1,423 flights, so UA 352 is about level with it. United flew 894 flights on the same city pair under all its flight numbers, including this one, and those ran 80.5% on time. Across its whole network United Airlines managed 78.8%, which this flight beats by 2 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 352thin sample | 308 | 81.2% | 83 min | 0.97% | B+ |
| All United Airlines on MTJ–DEN | 894 | 80.5% | 92 min | 0.45% | B+ |
| All carriers on MTJ–DEN | 1,423 | 80.4% | 83 min | 0.35% | B+ |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 352 quarter by quarter
UA 352 did not run the same all year. Its best quarter was Oct–Dec 2025 at 89.2% on time and its weakest Jul–Sep 2026 at 71.7%, a swing of 18 points on roughly 77 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Oct–Dec 202565 flights89.2%
- Jan–Mar 202690 flights78.4%
- Apr–Jun 202691 flights84.4%
- Jul–Sep 202662 flights71.7%
Scale runs 65% to 95%.
By weekday, UA 352 did best on Thursday at 88.1% on time and worst on Sunday at 75.6%. Each day rests on about 44 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 352 runs when it is late
UA 352 often beats the schedule: 155 of 303 completed flights, 51%, arrived 15 minutes or more early. The 57 late arrivals split 14 under half an hour, 20 between 30 and 60 minutes, and 23 an hour or more.
- 15+ min early155 flights51.2%
- Within 15 min91 flights30.0%
- 15–29 min late14 flights4.6%
- 30–59 min late20 flights6.6%
- 1–2 hours late11 flights3.6%
- 2+ hours late12 flights4.0%
Scale runs 0% to 100%.
Share of 303 completed flights by arrival against schedule.
17 of 62 late departures made up the time and arrived on time, 27% of them. 12 flights left on time and still arrived late.
The worst days
Worst days for UA 352
The latest arrival of the period was on 20 June 2026, 8 hours 4 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 20 June 2026 | 8 hours 4 minutes | Late-arriving aircraft |
| 19 December 2025 | 6 hours 50 minutes | Late-arriving aircraft |
| 17 February 2026 | 5 hours 21 minutes | National Airspace System |
| 30 August 2026 | 4 hours 53 minutes | National Airspace System |
| 20 February 2026 | 2 hours 53 minutes | Late-arriving aircraft |
Delay causes
Why UA 352 runs late
Late-arriving aircraft accounts for 57% of the 4,712 delay minutes carriers reported here, and the remaining four split what is left.
- 57%Late-arriving aircraft
- 29%National Airspace System
- 10%Carrier
- 4%Extreme weather
57% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 4,712 reported delay minutes here, that single category outweighs weather by 13 to one. The split is drawn from 4,712 delay minutes reported on UA 352.
Cancellations sit at 0.97% against a national 1.89%, which is ordinary. Diversions add another 0.65%.
Connections and routes
What a delay on this flight costs
7.6% 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 an hour and a half, which a normal layover absorbs.
The same number turns up on six other city pairs in the data, including DEN to MIA (42), DEN to ORD (40) and BUR to SFO (31), but none flew often enough under UA 352 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to MTJ to DEN only.
One caution: this is a thin sample. 308 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 UA 352
For a booking, read UA 352 as 81.2% on time with 0.97% cancelled over 308 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- MTJ to DEN, every carrier and departure
- DEN to MTJ, the return direction
- Denver International (DEN) delay statistics
- United Airlines on-time record
- Every United Airlines flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
A flight number here means United Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
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.