Flight number record
UA 2239
United Airlines · Hartford to Denver
- Route
- BDL → DEN
- Departs
- 15:30
- Flights
- 363
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s UA 2239, check with United Airlines.
UA 2239 lands a B, level with the national rate of 77.6%. Roughly one flight in four arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 363 flights, with a median arrival 4 minutes early.
Key figures
On time
76.9%
Arrivals under 15 minutes late, of 350 completed flights
Avg delay
73 min
Across delayed arrivals only, not all flights
Cancelled
1.10%
National rate is 1.81%
1 hour+ late
9.1%
National rate is 8.1%
These figures cover 363 flights between July 2025 and June 2026. Beyond the headline rate, 9.1% 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 2239 flies
UA 2239 flies BDL to DEN without a single fixed slot. Its most common scheduled departure was 15:30, used on 189 of 363 flights, with 15:25 (61 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 15:30189 flights52.1%
- Departs 15:2561 flights16.8%
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 15:30 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and UA 2239 runs 5 points better at 76.9%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
Against the route
UA 2239 next to BDL to DEN
Every carrier on BDL to DEN combined arrived on time 84.1% of the time across 922 flights, so UA 2239 is 7 points behind it. United flew 728 flights on the same city pair under all its flight numbers, including this one, and those ran 85.2% on time. Across its whole network United Airlines managed 79.0%, which this flight trails by 2 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 2239thin sample | 363 | 76.9% | 73 min | 1.10% | B |
| All United Airlines on BDL–DEN | 728 | 85.2% | 68 min | 1.10% | A |
| All carriers on BDL–DEN | 922 | 84.1% | 65 min | 1.08% | B |
| United Airlines, whole network | 821,041 | 79.0% | 72 min | 1.01% | B |
Across the year
UA 2239 quarter by quarter
UA 2239 did not run the same all year. Its best quarter was Oct–Dec 2025 at 83.1% on time and its weakest Apr–Jun 2026 at 70.8%, a swing of 12 points on roughly 91 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 flights71.8%
- Oct–Dec 202590 flights83.1%
- Jan–Mar 202690 flights81.6%
- Apr–Jun 202691 flights70.8%
Scale runs 60% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, UA 2239 did best on Monday at 84.0% on time and worst on Saturday at 70.6%. Each day rests on about 52 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Delay causes
Why UA 2239 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 5,912 reported delay minutes.
- 41%Late-arriving aircraft
- 32%National Airspace System
- 21%Carrier
- 6%Extreme weather
41% 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 5,912 reported delay minutes here, that single category outweighs weather by 7 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 5,912 delay minutes reported on UA 2239.
Cancellations sit at 1.10% against a national 1.81%, which is ordinary. Diversions add another 2.48%.
Connections and routes
What a delay on this flight costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 9.1% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
At 1,671 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
The same number turns up on one other city pair in the data, including DEN to DFW (95), but none flew often enough under UA 2239 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to BDL to DEN only.
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 2239
For a booking, UA 2239 is one of the weaker ways to fly BDL to DEN: 7 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
- BDL to DEN, every carrier and departure
- DEN to BDL, the return direction
- United Airlines 364 on the same route93.0%
- 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.