Flight number record
UA 709
United Airlines · Denver to Baltimore
- Route
- DEN → BWI
- Departs
- 17:45
- Flights
- 357
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s UA 709, check with United Airlines.
UA 709 sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 6 points worse than the national rate of 77.6%. The late ones land about an hour behind schedule. That rests on 357 flights, with a median arrival 1 minute early.
The national on-time rate over the same period is 77.6%, so UA 709 runs 6 points behind the country as a whole. Across a thousand flights that is about 60 extra late arrivals.
Key figures
On time
71.6%
Arrivals under 15 minutes late, of 352 completed flights
Avg delay
57 min
Across delayed arrivals only, not all flights
Cancelled
1.40%
National rate is 1.81%
1 hour+ late
8.2%
National rate is 8.1%
These figures cover 357 flights between July 2025 and June 2026. Beyond the headline rate, 8.2% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Schedule
When UA 709 flies
UA 709 flies DEN to BWI without a single fixed slot. Its most common scheduled departure was 17:45, used on 117 of 357 flights, with 17:48 (56 flights) and 17:50 (56 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 17:45117 flights32.8%
- Departs 17:4856 flights15.7%
- Departs 17:5056 flights15.7%
Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 17:45 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and UA 709 runs 3 points better at 71.6%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
Against the route
UA 709 next to DEN to BWI
Every carrier on DEN to BWI combined arrived on time 76.8% of the time across 2,868 flights, so UA 709 is 5 points behind it. United flew 901 flights on the same city pair under all its flight numbers, including this one, and those ran 80.6% on time. Across its whole network United Airlines managed 79.0%, which this flight trails by 7 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 709thin sample | 357 | 71.6% | 57 min | 1.40% | C |
| All United Airlines on DEN–BWI | 901 | 80.6% | 52 min | 0.78% | B+ |
| All carriers on DEN–BWI | 2,868 | 76.8% | 53 min | 1.22% | B |
| United Airlines, whole network | 821,041 | 79.0% | 72 min | 1.01% | B |
Across the year
UA 709 quarter by quarter
UA 709 did not run the same all year. Its best quarter was Oct–Dec 2025 at 85.6% on time and its weakest Jul–Sep 2025 at 51.6%, a swing of 34 points on roughly 89 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 202592 flights51.6%
- Oct–Dec 202590 flights85.6%
- Jan–Mar 202690 flights76.7%
- Apr–Jun 202685 flights72.9%
Scale runs 45% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, UA 709 did best on Monday at 78.4% on time and worst on Sunday at 53.1%. Each day rests on about 51 flights, so a gap of 25 points is worth noticing but could still narrow in another year.
Delay causes
Why UA 709 runs late
One category carries most of the weight here. Late-arriving aircraft accounts for 49% of the 5,671 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 49%Late-arriving aircraft
- 26%National Airspace System
- 24%Carrier
- 1%Extreme weather
49% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 5,671 reported delay minutes here, that single category outweighs weather by 49 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 5,671 delay minutes reported on UA 709.
Cancellations sit at 1.40% against a national 1.81%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
8.2% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.
The 1,491 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The same number turns up on five other city pairs in the data, including PHX to DEN (77), IAD to PHX (71) and BWI to ORD (6), but none flew often enough under UA 709 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DEN to BWI only.
One caution: this is a thin sample. 357 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 709
For a booking, UA 709 is one of the weaker ways to fly DEN to BWI: 5 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
- DEN to BWI, every carrier and departure
- BWI to DEN, the return direction
- United Airlines 1362 on the same route87.4%
- Denver International (DEN) delay statistics
- Baltimore/Washington International Thurgood Marshall (BWI) 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.