Carrier route record
UABDL→IAD
United Airlines · Hartford to Washington
- Flights
- 941
- Period
- September 2025 to August 2026
- Share of route
- 87%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with United Airlines.
United on BDL to IAD earns an A. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 8 points better than the national rate of 77.3%. When something does go wrong the average delay runs an hour and a half. That rests on 941 flights, with a median arrival 7 minutes early.
Set against the rest of the country, United's BDL to IAD record is 8 points better than the US average of 77.3%. That gap is worth roughly 80 fewer late arrivals for every thousand flights.
Key figures
On time
85.3%
Arrivals under 15 minutes late, of 927 completed flights
Avg delay
82 min
Across delayed arrivals only, not all flights
Cancelled
1.49%
National rate is 1.89%
Whole route
84.4%
Every carrier on BDL to IAD, 1,082 flights
These figures cover 941 flights between September 2025 and August 2026. The median arrival is 7 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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Carrier by carrier
United against every carrier on BDL to IAD
United flew 941 of the 1,082 flights on BDL to IAD, most of the route. Its 85.3% on time is about level with the route as a whole at 84.4%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from United at 85.3% to Republic at 78.4%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| United Airlines (this page) | 941 | 85.3% | 82 min | 1.49% | A |
| Republic Airwaysthin sample | 141 | 78.4% | 75 min | 4.96% | B− |
Flight by flight
United flight numbers on BDL to IAD
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.
Departure window
When United runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 26 points, against half a point between the best and worst carrier.
- 5am–8am355 flights93.7%
- 8am–11am229 flights90.7%
- 11am–2pm—
- 2pm–5pm225 flights67.3%
- 5pm–8pm33 flights81.8%
- 8pm–5am99 flights84.8%
Scale runs 60% to 100%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 93.7% of the time, against 67.3% for the afternoon window. That is 26 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5am–8am window is the busiest, with 355 flights scheduled in it.
Across the year
United on BDL to IAD through the year
August is the worst month at 74.7% on time, 18 points below October, the best at 92.3%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. April was the busiest month here, with 102 flights.
Across the week, Wednesday is the strongest day at 88.6% on time and Sunday the weakest at 77.4%, a spread of 11 points.
Arrival by arrival
How late United on BDL to IAD runs when it is late
The 136 late arrivals split 62 under half an hour, 28 between 30 and 60 minutes, and 46 an hour or more.
- 15+ min early229 flights24.7%
- Within 15 min562 flights60.6%
- 15–29 min late62 flights6.7%
- 30–59 min late28 flights3.0%
- 1–2 hours late20 flights2.2%
- 2+ hours late26 flights2.8%
Scale runs 0% to 100%.
Share of 927 completed flights by arrival against schedule.
16 of 107 late departures made up the time and arrived on time, 15% of them. 45 flights left on time and still arrived late.
The worst days
Worst days for United on BDL to IAD
The latest arrival of the period was on 13 March 2026, 9 hours 51 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On three of the five worst days the largest share was filed as national airspace system delay.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 13 March 2026 | 9 hours 51 minutes | Late-arriving aircraft |
| 21 July 2026 | 8 hours 37 minutes | National Airspace System |
| 28 July 2026 | 7 hours 54 minutes | National Airspace System |
| 6 August 2026 | 7 hours 6 minutes | National Airspace System |
| 10 May 2026 | 6 hours 29 minutes | Late-arriving aircraft |
Delay causes
Why United runs late on this route
National Airspace System accounts for 43% of the 11,000 delay minutes carriers reported here, and the remaining four split what is left.
- 43%National Airspace System
- 30%Late-arriving aircraft
- 20%Carrier
- 7%Extreme weather
43% 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 4,764 minutes out of 11,000, against a national NAS share of 21%. The split is drawn from 11,202 reported delay minutes.
The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 93.7% on time here.
Cancellations sit at 1.49% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and stage length
What a delay here costs
5.0% 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 an hour and a half, which a normal layover absorbs.
At 325 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 5am–8am window matters as much as it does.
The return leg runs 85.8% on time across 941 flights, within half a point of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
One caution: this is a thin sample. 941 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 United on BDL to IAD
Put together: treat all of this as provisional. 941 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 85.3% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 927 completed flights over 12 months sit behind that.
Related
Where to go next
- BDL to IAD, every carrier
- United on IAD to BDL, the return leg
- Republic Airways on BDL to IAD78.4%
- United Airlines network-wide record
- Washington Dulles International (IAD) delay statistics
- The best time of day to fly, according to 7.05 million flight records
- Worst months to fly in the US, ranked by the data
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.