Best Time to Fly DCA to LAS: On-Time Stats by Hour & Airline
Ronald Reagan Washington National → Harry Reid International
Data through July 2026 · Last updated October 18, 2026
729 flights were scheduled from Washington (DCA) to Las Vegas (LAS) in the last 12 months, and 70.1% of those that flew arrived on time, 7.6 points below the US average of 77.6%.
Among 2 airlines, American Airlines led with 88.3% on time and Southwest Airlines was last with 51.8%.
Over 24 months, Saturday was the most reliable day (83% on time) and June the worst month (61%).
The cancellation rate was 1.2% (US average 1.8%).
DCA to LAS 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 |
|---|---|---|---|---|
| American Airlines | 88.3% | 60 min | 1.4% | 364 |
| Southwest Airlines | 51.8% | 57 min | 1.1% | 365 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly DCA to LAS
On-time arrival % by scheduled departure hour (local time), 1,254 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | Limited data | 26 | |
| 7am–8am | 87.8% | 1.4% | 483 |
| 8am–9am | 85.7% | 0.0% | 147 |
| 9am–10am | 89.2% | 0.0% | 120 |
| 11am–12pm | Limited data | 1 | |
| 3pm–4pm | Limited data | 9 | |
| 4pm–5pm | 45.4% | 1.3% | 462 |
| 5pm–6pm | Limited data | 1 | |
| 6pm–7pm | Limited data | 5 | |
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 LAS
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 | 21 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 75.6% | +2.5 pts | 0.0% | 45 |
| Summer peak (Jun 15 - Aug 15) | 64.9% | -8.2 pts | 1.3% | 232 |
| All other days | 73.1% | — | 1.1% | 956 |
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).