Dulles (IAD) to Salt Lake City (SLC) flights
Delta Air Lines, United Airlines fly nonstop from Washington Dulles International Airport to Salt Lake City International Airport, with about 14 flights a week in July 2026. The 1,827-mile flight takes about 4h 45m gate to gate.
- Distance
- 1,827 mi · 2,940 km
- Flight time
- 4h 45m
- Airlines
- 2
- Seats filled
- 84%
Airlines flying IAD to SLC
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Delta Air Lines | 7 | Boeing 737-800, Boeing 737-900ER, Airbus A220-300 | 48,346 | 4h 39m |
| United Airlines | 7 | Boeing 737-700 / MAX 7, Boeing 737 MAX 8, Airbus A319 | 42,208 | 4h 51m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
IAD to SLC flight schedule
2 flight numbers flew this route in August 2026, 1 of them almost daily. The first usually leaves at 7:00am and the last at 5:50pm. 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) |
|---|---|---|---|---|
| DL 432Delta Air Lines | 7:00am | 9:39am | 31 | 85% |
| UA 2410United Airlines | 5:50pm | 8:46pm | 19 | 77% |
Is IAD to SLC on time?
From September 2025 to August 2026, 81% of 701 flights arrived within 15 minutes of schedule and 1.4% were cancelled. Flights leaving around 7am were the most punctual (86%), those around 5pm the least (78%). Most delay time was caused by the airline (crew, maintenance, cleaning, fuelling) (55%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Delta Air Lines | 364 | 85% | 16 min | 1.6% |
| United Airlines | 337 | 77% | 25 min | 1.2% |
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 | 34 | 82% | |
| 7am to 8am | 330 | 86% | |
| 5pm to 6pm | 328 | 78% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 63 | 8,328 | |
| September 2025 | 60 | 7,407 | |
| October 2025 | 62 | 7,530 | |
| November 2025 | 59 | 6,870 | |
| December 2025 | 44 | 6,151 | |
| January 2026 | 59 | 7,282 | |
| February 2026 | 54 | 6,491 | |
| March 2026 | 62 | 7,819 | |
| April 2026 | 60 | 7,845 | |
| May 2026 | 62 | 8,546 | |
| June 2026 | 59 | 8,142 | |
| July 2026 | 60 | 8,143 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.