Flight number record
UA 746
United Airlines · Washington to Denver
- Route
- DCA → DEN
- Departs
- 16:11
- Flights
- 363
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 746, check with United Airlines.
UA 746 lands a B+, about a point 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 363 flights, with a median arrival 6 minutes early.
Key figures
On time
78.3%
Arrivals under 15 minutes late, of 355 completed flights
Avg delay
87 min
Across delayed arrivals only, not all flights
Cancelled
0.55%
National rate is 1.89%
1 hour+ late
9.0%
National rate is 8.3%
These figures cover 363 flights between September 2025 and August 2026. Beyond the headline rate, 9.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When UA 746 flies
UA 746 flies DCA to DEN without a single fixed slot. Its most common scheduled departure was 16:11, used on 135 of 363 flights, with 16:13 (81 flights) and 16:17 (55 flights) next.
- Departs 16:11135 flights37.2%
- Departs 16:1381 flights22.3%
- Departs 16:1755 flights15.2%
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 16:11 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and UA 746 runs 6 points better at 78.3%. 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 746 next to DCA to DEN
Every carrier on DCA to DEN combined arrived on time 78.2% of the time across 1,347 flights, so UA 746 is about level with it. Across its whole network United Airlines managed 78.8%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 746thin sample | 363 | 78.3% | 87 min | 0.55% | B+ |
| All United Airlines on DCA–DENthin sample | 364 | 78.4% | 87 min | 0.55% | B+ |
| All carriers on DCA–DEN | 1,347 | 78.2% | 82 min | 0.89% | B+ |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 746 quarter by quarter
UA 746 did not run the same all year. Its best quarter was Apr–Jun 2026 at 83.3% on time and its weakest Jul–Sep 2025 at 70.0%, a swing of 13 points on roughly 73 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.
- Jul–Sep 202530 flights70.0%
- Oct–Dec 202591 flights78.0%
- Jan–Mar 202690 flights79.8%
- Apr–Jun 202691 flights83.3%
- Jul–Sep 202661 flights72.7%
Scale runs 60% to 90%.
By weekday, UA 746 did best on Tuesday at 86.3% on time and worst on Thursday at 68.0%. Each day rests on about 52 flights, so a gap of 18 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 746 runs when it is late
UA 746 often beats the schedule: 95 of 355 completed flights, 27%, arrived 15 minutes or more early. The 77 late arrivals split 26 under half an hour, 19 between 30 and 60 minutes, and 32 an hour or more.
- 15+ min early95 flights26.8%
- Within 15 min183 flights51.5%
- 15–29 min late26 flights7.3%
- 30–59 min late19 flights5.4%
- 1–2 hours late14 flights3.9%
- 2+ hours late18 flights5.1%
Scale runs 0% to 100%.
Share of 355 completed flights by arrival against schedule.
17 of 65 late departures made up the time and arrived on time, 26% of them. In the other direction, 29 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 DEN.
The worst days
Worst days for UA 746
The latest arrival of the period was on 11 June 2026, 14 hours 57 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 11 June 2026 | 14 hours 57 minutes | Carrier |
| 14 January 2026 | 6 hours 28 minutes | Late-arriving aircraft |
| 13 March 2026 | 5 hours 16 minutes | Carrier |
| 26 December 2025 | 4 hours 42 minutes | Carrier |
| 17 December 2025 | 4 hours 3 minutes | Late-arriving aircraft |
Delay causes
Why UA 746 runs late
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 6,690 reported delay minutes.
- 35%National Airspace System
- 31%Carrier
- 29%Late-arriving aircraft
- 5%Extreme weather
35% 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 2,362 minutes out of 6,690, against a national NAS share of 21%. The split is drawn from 6,690 delay minutes reported on UA 746.
Cancellations are rare at 0.55%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
9.0% 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 1,476 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.
Every one of the 363 flights under UA 746 in the data flew DCA to DEN. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 363 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 746
For a booking, read UA 746 as 78.3% on time with 0.55% cancelled over 363 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- DCA to DEN, every carrier and departure
- DEN to DCA, the return direction
- Frontier Airlines 685 on the same route85.6%
- Frontier Airlines 687 on the same route80.7%
- Frontier Airlines 689 on the same route66.7%
- Ronald Reagan Washington National (DCA) delay statistics
- 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.