Chicago (ORD) to Dulles (IAD) flights
United Airlines flies nonstop from Chicago O'Hare International Airport to Washington Dulles International Airport, with about 49 flights a week in July 2026. The 588-mile flight takes about 1h 58m gate to gate.
- Distance
- 588 mi · 946 km
- Flight time
- 1h 58m
- Airlines
- 1
- Seats filled
- 78%
Airlines flying ORD to IAD
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| United Airlines | 49 | Boeing 737-900ER, Boeing 737 MAX 9, Airbus A321 | 293,066 | 1h 58m |
| SkyWest AirlinesSeasonal or ended | n/a | Bombardier CRJ200, Bombardier CRJ550 | 1 | 2h 25m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
ORD to IAD flight schedule
12 flight numbers flew this route in August 2026, 7 of them almost daily. The first usually leaves at 6:30am and the last at 9:40pm. Times are local and can change; check with the airline before you book.
| Flight | Departs | Arrives | Days flown in August 2026 | On time (12 months) |
|---|---|---|---|---|
| UA 1689United Airlines | 6:30am | 9:24am | 10 | 100% |
| UA 1908United Airlines | 6:30am | 9:28am | 21 | 95% |
| UA 2277United Airlines | 8:45am | 11:52am | 31 | 92% |
| UA 2798United Airlines | 10:50am | 1:55pm | 21 | 71% |
| UA 1869United Airlines | 11:07am | 2:12pm | 10 | 88% |
| UA 293United Airlines | 12:56pm | 4:02pm | 21 | 71% |
| UA 2794United Airlines | 1:30pm | 4:30pm | 10 | 74% |
| UA 587United Airlines | 2:30pm | 5:37pm | 21 | 70% |
| UA 2437United Airlines | 3:53pm | 7:02pm | 10 | 70% |
| UA 2202United Airlines | 6:15pm | 9:20pm | 31 | 54% |
| UA 1922United Airlines | 9:39pm | 12:44am | 21 | 57% |
| UA 2766United Airlines | 9:40pm | 12:45am | 10 | 65% |
Is ORD to IAD on time?
From September 2025 to August 2026, 76% of 2,103 flights arrived within 15 minutes of schedule and 0.8% were cancelled. Flights leaving around 11am were the most punctual (89%), those around 6pm the least (63%). Most delay time was caused by late-arriving aircraft (38%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| United Airlines | 2,103 | 76% | 20 min | 0.8% |
Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.
On-time arrivals by departure time
| Scheduled departure | Flights | On time, relative | On time |
|---|---|---|---|
| 6am to 7am | 103 | 99% | |
| 8am to 9am | 353 | 88% | |
| 10am to 11am | 82 | 84% | |
| 11am to 12pm | 121 | 89% | |
| 12pm to 1pm | 97 | 84% | |
| 1pm to 2pm | 268 | 73% | |
| 2pm to 3pm | 283 | 72% | |
| 3pm to 4pm | 83 | 76% | |
| 4pm to 5pm | 53 | 60% | |
| 5pm to 6pm | 79 | 54% | |
| 6pm to 7pm | 285 | 63% | |
| 9pm to 10pm | 275 | 70% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 198 | 28,744 | |
| September 2025 | 204 | 26,338 | |
| October 2025 | 179 | 25,172 | |
| November 2025 | 153 | 21,345 | |
| December 2025 | 150 | 21,791 | |
| January 2026 | 132 | 15,038 | |
| February 2026 | 113 | 14,323 | |
| March 2026 | 150 | 21,798 | |
| April 2026 | 189 | 25,244 | |
| May 2026 | 222 | 30,794 | |
| June 2026 | 212 | 31,549 | |
| July 2026 | 219 | 31,258 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.