Best Time to Fly SLC to DCA: On-Time Stats by Hour & Airline
Salt Lake City International → Ronald Reagan Washington National
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 84.3% of Salt Lake City (SLC) to Washington (DCA) flights arrived on time (364 scheduled flights). That is 6.7 points above the national average of 77.6%.
Delta Air Lines was the only reporting airline with regular flights on this route.
Over 24 months, Saturday was the most reliable day (92% on time) and January the worst month (70%).
The cancellation rate was 0.8% (US average 1.8%).
SLC to DCA 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 | 84.3% | 38 min | 0.8% | 364 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SLC to DCA
On-time arrival % by scheduled departure hour (local time), 729 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 9am–10am | 80.5% | 1.2% | 413 |
| 10am–11am | 86.5% | 0.3% | 315 |
| 11am–12pm | Limited data | 1 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SLC to DCA
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) | 90.0% | +7.2 pts | 0.0% | 30 |
| Summer peak (Jun 15 - Aug 15) | 82.3% | -0.5 pts | 0.0% | 123 |
| All other days | 82.8% | — | 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).