Washington (DCA) to Las Vegas (LAS): On-Time Performance
Data through July 2026
The calendar drives reliability on DCA–LAS. September 2024 flights landed on schedule 97% of the time, but July 2026 dropped to 57% — a gap of 40 points. Across the full period the route averages 72% on-time against a national 78%.
- On-time
- 72%
- arrived <15 min late
- Avg delay
- 17 min
- completed flights
- Cancelled
- 1.0%
- Flights/day
- 2.0
- last 12 months
- Duration
- 5h 15m
- scheduled
- Distance
- 2,089 mi
Best airline from DCA to LAS
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| American Airlinesmost reliable | 88% | 7 min | 0.9% | 760 |
| Southwest Airlines | 49% | 31 min | 1.1% | 525 |
Monthly on-time trend
Best time to fly from DCA to LAS
Aim for departures around 9 a.m. (89% on-time); avoid 4 p.m. departures (45%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 69% | 16 min |
| Tuesday | 70% | 18 min |
| Wednesday | 73% | 15 min |
| Thursday | 68% | 24 min |
| Friday | 69% | 22 min |
| Saturdaybest | 83% | 11 min |
| Sunday | 72% | 15 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft38%
- Airline operations35%
- National airspace system25%
- Weather3%
Frequently asked questions
- How often are flights from DCA to LAS delayed?
- 28% of DCA–LAS flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 17 minutes.
- Which airline is most reliable from DCA to LAS?
- American Airlines has the best on-time record on this route at 88%, based on 760 flights. 2 airlines flew DCA–LAS frequently enough to compare in this period.
- What is the best time of day to fly from DCA to LAS?
- Departures around 9 a.m. have the best record (89% on-time), while departures around 4 p.m. have the worst (45%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from DCA to LAS?
- The scheduled DCA–LAS flight time averages 5h 15m over 2,089 miles. Actual arrival times vary — flights on this route land 15+ minutes late 28% of the time.
- How often are DCA to LAS flights cancelled?
- 1% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from DCA to LAS?
- July 2026 was the roughest month in this dataset, with only 57% of arrivals on time. The best was September 2024 at 97%. If your dates are flexible, that 40-point gap is worth planning around.
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Based on 1,285 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.