Flight number record
UA 709
United Airlines · Denver to Baltimore
- Route
- DEN → BWI
- Departs
- 17:48
- Flights
- 295
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 709, check with United Airlines.
UA 709 lands a B, level with the national rate of 77.3%. About one flight in four arrives 15 minutes late or worse, and those flights are late by roughly 55 minutes on average. That rests on 295 flights, with a median arrival 3 minutes early.
Key figures
On time
76.6%
Arrivals under 15 minutes late, of 291 completed flights
Avg delay
53 min
Across delayed arrivals only, not all flights
Cancelled
1.36%
National rate is 1.89%
1 hour+ late
5.2%
National rate is 8.3%
These figures cover 295 flights between September 2025 and August 2026. The median arrival is 3 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 709 flies
UA 709 flies DEN to BWI without a single fixed slot. Its most common scheduled departure was 17:48, used on 56 of 295 flights, with 17:50 (56 flights) and 17:45 (55 flights) next.
- Departs 17:4856 flights19.0%
- Departs 17:5056 flights19.0%
- Departs 17:4555 flights18.6%
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 17:48 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and UA 709 runs 9 points better at 76.6%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
UA 709 next to DEN to BWI
Every carrier on DEN to BWI combined arrived on time 77.3% of the time across 2,781 flights, so UA 709 is about level with it. United flew 839 flights on the same city pair under all its flight numbers, including this one, and those ran 82.2% on time. Across its whole network United Airlines managed 78.8%, which this flight trails by 2 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 709thin sample | 295 | 76.6% | 53 min | 1.36% | B |
| All United Airlines on DEN–BWI | 839 | 82.2% | 51 min | 0.60% | B+ |
| All carriers on DEN–BWI | 2,781 | 77.3% | 51 min | 0.97% | B+ |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | 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 60.0%, a swing of 26 points on roughly 74 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 flights60.0%
- Oct–Dec 202590 flights85.6%
- Jan–Mar 202690 flights76.7%
- Apr–Jun 202685 flights72.9%
Scale runs 50% to 90%.
By weekday, UA 709 did best on Wednesday at 83.3% on time and worst on Sunday at 52.5%. Each day rests on about 42 flights, so a gap of 31 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 709 runs when it is late
The 68 late arrivals split 27 under half an hour, 26 between 30 and 60 minutes, and 15 an hour or more.
- 15+ min early65 flights22.3%
- Within 15 min158 flights54.3%
- 15–29 min late27 flights9.3%
- 30–59 min late26 flights8.9%
- 1–2 hours late9 flights3.1%
- 2+ hours late6 flights2.1%
Scale runs 0% to 100%.
Share of 291 completed flights by arrival against schedule.
16 of 58 late departures made up the time and arrived on time, 28% of them. In the other direction, 26 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 BWI.
The worst days
Worst days for UA 709
The latest arrival of the period was on 31 May 2026, 5 hours 55 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 31 May 2026 | 5 hours 55 minutes | Late-arriving aircraft |
| 13 March 2026 | 4 hours 40 minutes | Late-arriving aircraft |
| 17 February 2026 | 3 hours 13 minutes | Late-arriving aircraft |
| 14 June 2026 | 2 hours 38 minutes | Carrier |
| 25 February 2026 | 2 hours 10 minutes | Late-arriving aircraft |
Delay causes
Why UA 709 runs late
Late-arriving aircraft accounts for 48% of the 3,579 delay minutes carriers reported here, and the remaining four split what is left.
- 48%Late-arriving aircraft
- 26%Carrier
- 25%National Airspace System
- 0%Extreme weather
48% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 3,579 reported delay minutes here, that single category outweighs weather by 48 to one. The split is drawn from 3,579 delay minutes reported on UA 709.
Cancellations sit at 1.36% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
5.2% 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 roughly 55 minutes, 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.
The same number turns up on six other city pairs in the data, including PHX to DEN (98), IAD to PHX (71) and BWI to ORD (46), 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. 295 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, read UA 709 as 76.6% on time with 1.36% cancelled over 295 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- DEN to BWI, every carrier and departure
- BWI to DEN, the return direction
- United Airlines 1362 on the same route88.7%
- 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.