Las Vegas (LAS) to Washington (DCA): On-Time Performance
Data through July 2026
The calendar drives reliability on LAS–DCA. October 2024 flights landed on schedule 97% of the time, but July 2025 dropped to 55% — a gap of 42 points. Across the full period the route averages 75% on-time against a national 78%.
- On-time
- 75%
- arrived <15 min late
- Avg delay
- 17 min
- completed flights
- Cancelled
- 0.7%
- Flights/day
- 2.0
- last 12 months
- Duration
- 4h 35m
- scheduled
- Distance
- 2,089 mi
Best airline from LAS to DCA
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| American Airlinesmost reliable | 80% | 19 min | 0.9% | 760 |
| Southwest Airlines | 69% | 13 min | 0.4% | 524 |
Monthly on-time trend
Best time to fly from LAS to DCA
Aim for departures around 10 a.m. (84% on-time); avoid 9 a.m. departures (63%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 71% | 15 min |
| Tuesday | 75% | 13 min |
| Wednesday | 74% | 18 min |
| Thursday | 74% | 28 min |
| Friday | 72% | 21 min |
| Saturdaybest | 86% | 11 min |
| Sunday | 76% | 12 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft30%
- Airline operations38%
- National airspace system29%
- Weather3%
Frequently asked questions
- How often are flights from LAS to DCA delayed?
- 25% of LAS–DCA 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 LAS to DCA?
- American Airlines has the best on-time record on this route at 80%, based on 760 flights. 2 airlines flew LAS–DCA frequently enough to compare in this period.
- What is the best time of day to fly from LAS to DCA?
- Departures around 10 a.m. have the best record (84% on-time), while departures around 9 a.m. have the worst (63%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from LAS to DCA?
- The scheduled LAS–DCA flight time averages 4h 35m over 2,089 miles. Actual arrival times vary — flights on this route land 15+ minutes late 25% of the time.
- How often are LAS to DCA flights cancelled?
- 0.7% 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 LAS to DCA?
- July 2025 was the roughest month in this dataset, with only 55% of arrivals on time. The best was October 2024 at 97%. If your dates are flexible, that 42-point gap is worth planning around.
Explore related pages
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Related guides
Based on 1,284 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.