Flight number record
UA 1436
United Airlines · Missoula to Denver
- Route
- MSO → DEN
- Departs
- 14:35
- Flights
- 272
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 1436, check with United Airlines.
UA 1436 sits in the middle of the pack with a C+. Close to three flights in four arrive on time by the DOT's definition, 3 points worse than the national rate of 77.3%. The late ones land close to two hours behind schedule. That rests on 272 flights, with a median arrival 3 minutes early.
Key figures
On time
74.7%
Arrivals under 15 minutes late, of 269 completed flights
Avg delay
103 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
11.2%
National rate is 8.3%
These figures cover 272 flights between September 2025 and August 2026. Beyond the headline rate, 11.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Schedule
When UA 1436 flies
UA 1436 flies MSO to DEN without a single fixed slot. Its most common scheduled departure was 14:35, used on 76 of 272 flights, with 14:38 (51 flights) and 14:26 (35 flights) next.
- Departs 14:3576 flights27.9%
- Departs 14:3851 flights18.8%
- Departs 14:2635 flights12.9%
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 14:35 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and UA 1436 runs 3 points better at 74.7%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Against the route
UA 1436 next to MSO to DEN
Every carrier on MSO to DEN combined arrived on time 81.1% of the time across 1,198 flights, so UA 1436 is 6 points behind it. United flew 717 flights on the same city pair under all its flight numbers, including this one, and those ran 83.1% on time. Across its whole network United Airlines managed 78.8%, which this flight trails by 4 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 1436thin sample | 272 | 74.7% | 103 min | 0.00% | C+ |
| All United Airlines on MSO–DEN | 717 | 83.1% | 91 min | 0.28% | B+ |
| All carriers on MSO–DEN | 1,198 | 81.1% | 94 min | 0.58% | B+ |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 1436 quarter by quarter
UA 1436 did not run the same all year. Its best quarter was Jan–Mar 2026 at 81.1% on time and its weakest Jul–Sep 2026 at 54.2%, a swing of 27 points on roughly 68 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 202566 flights80.3%
- Jan–Mar 202653 flights81.1%
- Apr–Jun 202691 flights80.2%
- Jul–Sep 202662 flights54.2%
Scale runs 45% to 85%.
By weekday, UA 1436 ranged from 70.0% on Sunday to 81.6% on Saturday. With about 39 flights behind each day, a spread of 12 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late UA 1436 runs when it is late
The 68 late arrivals split 20 under half an hour, 18 between 30 and 60 minutes, and 30 an hour or more.
- 15+ min early66 flights24.5%
- Within 15 min135 flights50.2%
- 15–29 min late20 flights7.4%
- 30–59 min late18 flights6.7%
- 1–2 hours late10 flights3.7%
- 2+ hours late20 flights7.4%
Scale runs 0% to 100%.
Share of 269 completed flights by arrival against schedule.
18 of 75 late departures made up the time and arrived on time, 24% of them. 11 flights left on time and still arrived late.
The worst days
Worst days for UA 1436
The latest arrival of the period was on 22 July 2026, 8 hours 38 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). Four of the five worst days fell in August 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 22 July 2026 | 8 hours 38 minutes | Carrier |
| 8 August 2026 | 8 hours 3 minutes | Late-arriving aircraft |
| 13 August 2026 | 7 hours 57 minutes | National Airspace System |
| 14 August 2026 | 6 hours 57 minutes | National Airspace System |
| 30 August 2026 | 4 hours 40 minutes | National Airspace System |
Delay causes
Why UA 1436 runs late
National Airspace System accounts for 53% of the 6,977 delay minutes carriers reported here, and the remaining four split what is left.
- 53%National Airspace System
- 24%Late-arriving aircraft
- 15%Carrier
- 8%Extreme weather
53% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 3,667 minutes out of 6,977, against a national NAS share of 21%. The split is drawn from 6,977 delay minutes reported on UA 1436.
Cancellations are rare at 0.00%, below the national 1.89% 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 routes
What a delay on this flight costs
11.2% 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 679 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 same number turns up on three other city pairs in the data, including DEN to OMA (179), DEN to ICT (92) and LAS to ORD (47), but none flew often enough under UA 1436 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to MSO to DEN only.
One caution: this is a thin sample. 272 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 1436
For a booking, UA 1436 is one of the weaker ways to fly MSO to DEN: 6 points below the route as a whole. If the schedule allows, compare it with the other departures listed on the route page before settling on this one.
Related
Where to go next
- MSO to DEN, every carrier and departure
- DEN to MSO, 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
- How often a connection fails at the major US hubs
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.