Route Reliability
Washington → Salt Lake City
DCA–SLC · 1,851 miles · Ronald Reagan Washington National Airport to Salt Lake City International Airport
75
Usually Fine
WanderNerd Reliability Score
- 75%
- Arrive within 15 minutes
- 17 min
- Average arrival delay
- 1.1%
- Cancelled
- 365
- Flights in the data
Data through May 2026.
Delta Air Lines is the only airline in this data on this route, arriving on time 75% of the time across 365 flights. No comparison to make.
What the data says
Wednesdays have been rough.
DCA–SLC flights arrived on time 82% of the time on Sundays and just 64% on Wednesdays. That gap is worth planning around.
The breakdown
- Mon81%(52 flights)
- Tue73%(52 flights)
- Wed64%(52 flights)
- Thu69%(52 flights)
- Fri73%(52 flights)
- Sat82%(50 flights)
- Sun82%(51 flights)
77%
May
Jun 62% → May 77% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 62% | 29 |
| July 2025 | 58% | 31 |
| August 2025 | 87% | 31 |
| September 2025 | 77% | 30 |
| October 2025 | 77% | 31 |
| November 2025 | 90% | 30 |
| December 2025 | 81% | 31 |
| January 2026 | 63% | 30 |
| February 2026 | 81% | 26 |
| March 2026 | 74% | 31 |
| April 2026 | 70% | 30 |
| May 2026 | 77% | 31 |
Same trip, other airports
Keep nerding
Based on 365 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.