Route Reliability
Salt Lake City → Washington
SLC–IAD · 1,827 miles · Salt Lake City International Airport to Washington Dulles International Airport
- 86%
- Arrive within 15 minutes
- 0 min
- Average arrival delay
- 1.1%
- Cancelled
- 714
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.United Airlines88%349 flights
- 2.Delta Air Lines84%365 flights
What the data says
Morning-you made the right choice.
SLC–IAD flights departing between 6–9 AM arrived on time 96% of the time, versus 80% between 12–3 PM.
Sunday scaries are real for this one.
SLC–IAD flights arrived on time 90% of the time on Tuesdays. On Sundays: 80%.
United Airlines has a slight edge here.
United Airlines arrived on time 88% of the time on this route; Delta Air Lines managed 84%.
Ticking up lately.
SLC–IAD flights arrived on time 88% of the time over the last three months in the data, compared with 85% in the three months before that.
Flights on this route
The breakdown
- Mon90%(99 flights)
- Tue90%(100 flights)
- Wed85%(99 flights)
- Thu86%(101 flights)
- Fri83%(102 flights)
- Sat88%(103 flights)
- Sun80%(101 flights)
- 6–9 AM96%(25 flights)
- 9 AM–12 PM91%(214 flights)
- 12–3 PM80%(54 flights)
- 3–6 PM83%(336 flights)
- 6–9 PM96%(22 flights)
- 9 PM–12 AM83%(54 flights)
Jun 75% → May 89% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 75% | 61 |
| July 2025 | 73% | 62 |
| August 2025 | 95% | 62 |
| September 2025 | 90% | 60 |
| October 2025 | 89% | 62 |
| November 2025 | 93% | 59 |
| December 2025 | 87% | 45 |
| January 2026 | 81% | 58 |
| February 2026 | 87% | 54 |
| March 2026 | 84% | 61 |
| April 2026 | 92% | 60 |
| May 2026 | 89% | 61 |
Same trip, other airports
Keep nerding
Based on 714 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.