Carrier route record
UAORD→DCA
United Airlines · Chicago to Washington
- Flights
- 3,393
- Period
- July 2025 to June 2026
- Share of route
- 49%
- Carriers
- 5
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with United Airlines.
United on ORD to DCA sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 7 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 3,393 flights. The strongest carrier on the route with a full sample, Republic Airways, flew 1,055 at 68.5% on time.
The national on-time rate over the same period is 77.6%, so United on ORD to DCA runs 7 points behind the country as a whole. Across a thousand flights that is about 70 extra late arrivals.
Key figures
On time
70.6%
Arrivals under 15 minutes late, of 3,313 completed flights
Avg delay
75 min
Across delayed arrivals only, not all flights
Cancelled
1.80%
National rate is 1.81%
Whole route
69.1%
Every carrier on ORD to DCA, 6,987 flights
These figures cover 3,393 flights between July 2025 and June 2026. Beyond the headline rate, 12.1% 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.
Carrier by carrier
United against every carrier on ORD to DCA
United flew 3,393 of the 6,987 flights on ORD to DCA, about 49% of it. Its 70.6% on time is 2 points better than the route as a whole, which runs 69.1%. Ranked by on-time rate it is number two of five carriers on the route, where the range runs from Envoy at 83.5% to SkyWest at 61.5%. Two of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The two carriers here are closely matched: 2 points separate the best from the worst. At that spread, schedule and price are better tie-breakers than reliability. Sample sizes are shown so you can see which rows are worth weighing.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Envoy Airthin sample | 171 | 83.5% | 47 min | 2.34% | B |
| United Airlines (this page) | 3,393 | 70.6% | 75 min | 1.80% | C |
| Republic Airways | 1,055 | 68.5% | 74 min | 4.55% | C− |
| American Airlines | 2,299 | 66.3% | 95 min | 4.18% | C− |
| SkyWest Airlinesthin sample | 69 | 61.5% | 93 min | 5.80% | D− |
Republic Airways cancels 4.5% 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.
Flight by flight
United flight numbers on ORD to DCA
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 38 points, against 2 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am668 flights88.7%
- 8am–11am795 flights83.7%
- 11am–2pm668 flights65.8%
- 2pm–5pm631 flights59.5%
- 5pm–8pm629 flights50.7%
- 8pm–5am2 flights—
Scale runs 40% to 95%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 50.7% on time, against 88.7% for the 5am–8am 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 8am–11am window is the busiest, with 795 flights scheduled in it.
Across the year
United on ORD to DCA through the year
July is the worst month at 60.4% on time, 16 points below October, the best at 76.5%. 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 348 flights.
Across the week, Saturday is the strongest day at 75.8% on time and Friday the weakest at 66.3%. 10 points is a smaller lever than departure hour, but it is free.
Delay causes
Why United runs late on this route
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 73,000 reported delay minutes.
- 38%Late-arriving aircraft
- 38%National Airspace System
- 19%Carrier
- 5%Extreme weather
38% 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 73,000 reported delay minutes here, that single category outweighs weather by 8 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 72,642 reported delay minutes.
38% 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 28,000 minutes out of 73,000, against a national NAS share of 21%.
Cancellations sit at 1.80% against a national 1.81%, which is ordinary. Diversions add another 0.56%.
Connections and stage length
What a delay here costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 12.1% 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 612 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 return leg is a different operation and performs like one: it runs 73.6% on time across 3,392 flights, 3 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 3 points of difference.
The sample behind these figures is 3,393 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.
What to do with this
Booking United on ORD to DCA
Put together: the calendar is the biggest lever here, not the carrier or the hour. October runs 76.5% on time and July 60.4%, a swing of 16 points. If the dates move at all, move them out of July before you think about anything else. 3,313 completed flights over 12 months sit behind that.
Related
Where to go next
- ORD to DCA, every carrier
- United on DCA to ORD, the return leg
- Envoy Air on ORD to DCA83.5%
- Republic Airways on ORD to DCA68.5%
- American Airlines on ORD to DCA66.3%
- United Airlines network-wide record
- Chicago O'Hare International (ORD) delay statistics
- Ronald Reagan Washington National (DCA) delay statistics
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.04 million flight records
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.