Carrier performance at one airport
UA→DCA
United Airlines at Ronald Reagan Washington National
- Departures
- 6,900
- Period
- July 2025 to June 2026
- Routes
- 4
- Rank here
- #4 of 10
United Airlines at Washington lands a B, level with the national rate of 77.6%. Roughly one flight in five arrive 15 minutes late or worse, and those flights are late by an hour and a half on average. That is a workable record, not a spotless one. That rests on 6,900 flights, of which Delta Air Lines flew 9,505 at 78.7% on time.
Measured against the airport rather than the country, United Airlines runs 5 points ahead of the 73.2% weighted average across all carriers at DCA. That is the comparison worth making: every operator here works the same runways, the same airspace and the same weather.
Key figures
On time
77.8%
6,772 completed departures
Avg delay
89 min
Across delayed flights only
Cancelled
1.55%
At DCA, this carrier only
Rank here
#4
Of 10 carriers clearing the floor at DCA
These figures cover 6,900 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.
Against the competition
Every carrier at DCA, ranked
The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 78.7% of the time; PSA Airlines manages 67.7%. Sample sizes sit next to every figure, because a two-point gap across 39,988 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Lines | 9,505 | 78.7% | 90 min | 2.54% | B |
| Frontier Airlines | 984 | 78.4% | 80 min | 0.91% | B+ |
| Envoy Air | 4,857 | 78.0% | 74 min | 3.77% | B− |
| United Airlines (this page) | 6,900 | 77.8% | 89 min | 1.55% | B |
| Republic Airways | 27,126 | 76.2% | 67 min | 4.33% | B− |
| American Airlines | 27,872 | 74.8% | 84 min | 2.67% | C |
| Southwest Airlines | 16,065 | 74.1% | 64 min | 1.77% | C |
| Alaska Airlines | 2,185 | 71.1% | 59 min | 1.14% | C |
| JetBlue Airways | 6,699 | 69.4% | 84 min | 2.96% | C |
| PSA Airlines | 39,988 | 67.7% | 79 min | 5.71% | C− |
PSA Airlines cancels 5.7% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.
Route by route
Where United Airlines flies from DCA
United Airlines operates 4 routes out of DCA with enough volume to report. Route records inside one carrier at one airport still spread widely, because a short shuttle and a transcontinental have very different exposure to a late inbound.
| Route | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DCA to ORD · Chicago | 3,392 | 73.6% | 89 min | 2.21% | C |
| DCA to IAH · Houston | 2,413 | 83.8% | 95 min | 0.91% | B+ |
| DCA to SFO · San Francisco | 729 | 76.9% | 70 min | 1.23% | B |
| DCA to DEN · Denver | 365 | 78.8% | 104 min | 0.27% | B+ |
Departure window
Best time of day for this operation
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 38 points, against 11 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am1,314 flights90.0%
- 8am–11am1,062 flights90.4%
- 11am–2pm1,365 flights85.5%
- 2pm–5pm1,423 flights73.8%
- 5pm–8pm1,334 flights52.8%
- 8pm–5am402 flights75.3%
Scale runs 45% to 95%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 52.8% on time, against 90.4% for the 8am–11am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 2pm–5pm window is the busiest, with 1,423 flights scheduled in it.
Across the year
Seasonal pattern
July is the worst month at 67.4% on time, 16 points below February, the best at 83.7%. 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. July was the busiest month here, with 648 flights.
Delay causes
What holds this operation up
- 39%National Airspace System
- 36%Late-arriving aircraft
- 18%Carrier
- 7%Extreme weather
- 0%Security
36% 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 134,000 reported delay minutes here, that single category outweighs weather by 5 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 133,593 reported delay minutes.
Cancellations sit at 1.55% against a national 1.81%, which is ordinary. Diversions add another 0.30%.
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.
The sample behind these figures is 6,900 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
Put together: the calendar is the biggest lever here, not the carrier or the hour. February runs 83.7% on time and July 67.4%, a swing of 16 points. If the dates move at all, move them out of July before you think about anything else. 6,772 completed flights over 12 months sit behind that.
Common questions
United Airlines at DCA
How often is United Airlines at DCA delayed?
Roughly one flight in five arrive at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 22.2% of the 6,900 flights in this analysis, against 22.4% nationally. Delayed flights are late by an hour and a half on average.
Which airline is most reliable on United Airlines at DCA?
Delta Air Lines leads at 78.7% on time across 9,505 flights. PSA Airlines is at the other end on 67.7%, a gap of 11 points. Sample size matters as much as the percentage: a rate built from a few hundred flights moves around far more than one built from ten thousand.
What time of day has the fewest delays on United Airlines at DCA?
The 8am–11am departure window is the strongest at 90.4% on time. The 5pm–8pm window is the weakest at 52.8%, 38 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are July delays on United Airlines at DCA?
July is the weakest month at 67.4% on time, compared with 83.7% in February. Across the year that is 16 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Updated monthly. How this data is collected.