Best Time to Fly DCA to SLC: On-Time Stats by Hour & Airline
Ronald Reagan Washington National → Salt Lake City International
Data through July 2026 · Last updated October 18, 2026
364 flights were scheduled from Washington (DCA) to Salt Lake City (SLC) in the last 12 months, and 74.7% of those that flew arrived on time, 2.9 points below the US average of 77.6%.
Delta Air Lines was the only reporting airline with regular flights on this route.
November has been the best month (90% on time) and Wednesday the weakest day of the week (71%).
1.1% of flights were cancelled, versus 1.8% nationally.
DCA to SLC on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Lines | 74.7% | 56 min | 1.1% | 364 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly DCA to SLC
On-time arrival % by scheduled departure hour (local time), 729 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 12pm–1pm | Limited data | 1 | |
| 5pm–6pm | 76.5% | 1.0% | 728 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on DCA to SLC
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | Limited data | 14 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 73.3% | -4.7 pts | 0.0% | 30 |
| Summer peak (Jun 15 - Aug 15) | 69.7% | -8.3 pts | 0.8% | 123 |
| All other days | 78.0% | — | 1.1% | 562 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).