Dulles (IAD) to Chicago (ORD) flights
United Airlines flies nonstop from Washington Dulles International Airport to Chicago O'Hare International Airport, with about 48 flights a week in July 2026. The 588-mile flight takes about 2h 16m gate to gate.
- Distance
- 588 mi · 946 km
- Flight time
- 2h 16m
- Airlines
- 1
- Seats filled
- 80%
Airlines flying IAD to ORD
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| United Airlines | 48 | Boeing 737-900ER, Airbus A321, Boeing 737 MAX 9 | 298,992 | 2h 16m |
| SkyWest AirlinesSeasonal or ended | n/a | Bombardier CRJ200, Bombardier CRJ550 | 0 | 2h 32m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
IAD to ORD flight schedule
10 flight numbers flew this route in August 2026, 7 of them almost daily. The first usually leaves at 6:10am and the last at 10:27pm. 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 2070United Airlines | 6:10am | 7:27am | 10 | 85% |
| UA 1555United Airlines | 6:15am | 7:30am | 21 | 95% |
| UA 1775United Airlines | 8:20am | 9:38am | 31 | 84% |
| UA 1252United Airlines | 10:35am | 11:53am | 31 | 92% |
| UA 2331United Airlines | 1:10pm | 2:27pm | 31 | 80% |
| UA 1393United Airlines | 3:39pm | 5:02pm | 10 | 61% |
| UA 1580United Airlines | 3:40pm | 4:59pm | 21 | 52% |
| UA 2497United Airlines | 5:15pm | 6:37pm | 31 | 47% |
| UA 1738United Airlines | 10:20pm | 11:31pm | 10 | 78% |
| UA 421United Airlines | 10:27pm | 11:40pm | 21 | 67% |
Is IAD to ORD on time?
From September 2025 to August 2026, 75% of 2,106 flights arrived within 15 minutes of schedule and 0.9% were cancelled. Flights leaving around 10am were the most punctual (91%), those around 5pm the least (47%). Most delay time was caused by air traffic control and airport congestion (59%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| United Airlines | 2,106 | 75% | 21 min | 0.9% |
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 | 291 | 91% | |
| 8am to 9am | 365 | 85% | |
| 10am to 11am | 157 | 91% | |
| 1pm to 2pm | 328 | 79% | |
| 3pm to 4pm | 148 | 64% | |
| 5pm to 6pm | 365 | 47% | |
| 6pm to 7pm | 50 | 40% | |
| 10pm to 11pm | 360 | 78% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 193 | 28,959 | |
| September 2025 | 204 | 26,776 | |
| October 2025 | 176 | 25,798 | |
| November 2025 | 149 | 19,997 | |
| December 2025 | 151 | 20,993 | |
| January 2026 | 131 | 16,181 | |
| February 2026 | 112 | 14,394 | |
| March 2026 | 155 | 22,368 | |
| April 2026 | 184 | 25,208 | |
| May 2026 | 218 | 30,809 | |
| June 2026 | 211 | 33,632 | |
| July 2026 | 213 | 33,917 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.