Atlanta (ATL) to Dulles (IAD) flights
Delta Air Lines, United Airlines, Frontier Airlines fly nonstop from Hartsfield Jackson Atlanta International Airport to Washington Dulles International Airport, with about 81 flights a week in July 2026. The 534-mile flight takes about 1h 45m gate to gate.
- Distance
- 534 mi · 859 km
- Flight time
- 1h 45m
- Airlines
- 3
- Seats filled
- 77%
Airlines flying ATL to IAD
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Delta Air Lines | 44 | Airbus A319, Airbus A220-300, Airbus A320-100/200 | 251,324 | 1h 42m |
| United Airlines | 23 | Airbus A319, Boeing 737-700 / MAX 7, Boeing 737-800 | 110,566 | 1h 48m |
| Frontier Airlines | 14 | Airbus A321, Airbus A320neo, Airbus A320-100/200 | 100,804 | 1h 48m |
| Mesa AirlinesSeasonal or ended | n/a | Embraer E175 | 4,215 | 1h 41m |
| Republic AirlineSeasonal or ended | n/a | Embraer E175 | 1,294 | 1h 57m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
ATL to IAD flight schedule
15 flight numbers flew this route in August 2026, 12 of them almost daily. The first usually leaves at 5:30am and the last at 10:45pm. 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 6115United Airlines · operated by Mesa Airlines | 5:30am | 7:20am | 12 | 75% |
| UA 641United Airlines | 5:30am | 7:20am | 10 | 97% |
| DL 1324Delta Air Lines | 7:36am | 9:20am | 31 | 90% |
| DL 1444Delta Air Lines | 9:45am | 11:33am | 27 | 88% |
| UA 632United Airlines | 9:50am | 11:41am | 27 | 87% |
| DL 2135Delta Air Lines | 12:20pm | 2:05pm | 31 | 83% |
| UA 1831United Airlines | 2:33pm | 4:24pm | 30 | 76% |
| DL 1695Delta Air Lines | 2:54pm | 4:42pm | 30 | 76% |
| F9 4410Frontier Airlines | 3:13pm | 5:14pm | 31 | 67% |
| DL 2902Delta Air Lines | 4:35pm | 6:28pm | 25 | 70% |
| DL 1309Delta Air Lines | 7:05pm | 8:55pm | 23 | 73% |
| UA 2634United Airlines | 7:32pm | 9:30pm | 8 | 77% |
| UA 2131United Airlines | 7:38pm | 9:29pm | 21 | 81% |
| F9 3692Frontier Airlines | 9:00pm | 10:52pm | 31 | 52% |
| DL 2549Delta Air Lines | 10:45pm | 12:34am | 31 | 73% |
Is ATL to IAD on time?
From September 2025 to August 2026, 77% of 4,100 flights arrived within 15 minutes of schedule and 2.1% were cancelled. Flights leaving around 5am were the most punctual (94%), those around 10pm the least (64%). Most delay time was caused by the airline (crew, maintenance, cleaning, fuelling) (44%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Delta Air Lines | 2,233 | 78% | 18 min | 2.7% |
| United Airlines | 1,206 | 82% | 15 min | 0.8% |
| Frontier Airlines | 661 | 63% | 31 min | 2.1% |
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 |
|---|---|---|---|
| 5am to 6am | 214 | 94% | |
| 7am to 8am | 272 | 87% | |
| 8am to 9am | 132 | 88% | |
| 9am to 10am | 543 | 84% | |
| 10am to 11am | 139 | 83% | |
| 12pm to 1pm | 266 | 84% | |
| 1pm to 2pm | 100 | 76% | |
| 2pm to 3pm | 632 | 75% | |
| 3pm to 4pm | 189 | 67% | |
| 4pm to 5pm | 243 | 67% | |
| 7pm to 8pm | 565 | 74% | |
| 9pm to 10pm | 203 | 60% | |
| 10pm to 11pm | 368 | 64% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 350 | 40,308 | |
| September 2025 | 334 | 35,976 | |
| October 2025 | 363 | 41,482 | |
| November 2025 | 335 | 37,015 | |
| December 2025 | 333 | 38,790 | |
| January 2026 | 268 | 27,743 | |
| February 2026 | 260 | 29,069 | |
| March 2026 | 298 | 34,400 | |
| April 2026 | 352 | 41,004 | |
| May 2026 | 401 | 53,481 | |
| June 2026 | 379 | 45,504 | |
| July 2026 | 358 | 43,637 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.