73% of flights from Las Vegas to Washington arrived on time over the past 12 months. That is worse than the typical U.S. route. The 11 a.m. departures ran on time 80% of the time; the 9 a.m. ones 64%. Most reliable airline: American Airlines (77%). 8% of flights arrived more than an hour late or not at all.
How late?
The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for LAS → DCA: when a flight was late, it was under 45 minutes late 63% of the time. About 1 in 15 flights landed an hour or more late, and 1 in 121 three hours or more; 1.0% were cancelled outright.
- On time or early73%
- 15–30 min late9.5%
- 30–60 min late9.3%
- 1–2 hours late4.8%
- 2–3 hours late0.8%
- 3+ hours late0.8%
- Diverted0.7%
- Cancelled1.0%
Share of all 728 scheduled flights, past 12 months, by arrival time against schedule.
By airline
| Airline | Flights | On time | Cancelled | Typical arrival | 1h+ late | Avg when late | Operated by |
|---|---|---|---|---|---|---|---|
| American Airlines | 364 | 77% | 1.4% | −11 min | 8.2% | +79 min | American Airlines |
| Southwest Airlines | 364 | 69% | 0.5% | +2 min | 4.7% | +40 min | Southwest Airlines |
Airline = the name on the ticket. Regional flights (e.g. "Delta Connection") count under the ticketing airline, and the operator is listed.
Best time of day to fly
On-time rate by scheduled departure hour (local time at LAS). Delays build through the day as late planes knock on, so early flights usually do best.
By airline and hour
| Departs | American Airlines | Southwest Airlines |
|---|---|---|
| 9 a.m. | — | 64% |
| 11 a.m. | 79% | — |
| noon | 74% | — |
| 1 p.m. | 79% | — |
By month
Each calendar month pooled over 2023–2026. Best: April (85%). Worst: July (59%).
By day of week
| Day | Flights | On time | Cancelled |
|---|---|---|---|
| Monday | 106 | 69% | 1.9% |
| Tuesday | 104 | 75% | 1.0% |
| Wednesday | 104 | 71% | 0.0% |
| Thursday | 104 | 72% | 0.0% |
| Friday | 104 | 66% | 0.0% |
| Saturday | 102 | 85% | 1.0% |
| Sunday | 104 | 73% | 2.9% |
Why flights were late
Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.
Cancellations: weather 6 · air traffic/airport 1
Month by month
Not enough months with data to draw a trend.
Nearby airport alternatives
Other ways to make the same trip, using airports within 60 miles of Las Vegas or Washington. LAS → IAD has been 11 points more reliable.
| Route | Flights | On time | Cancelled |
|---|---|---|---|
| LAS → DCA (this route) | 728 | 73% | 1.0% |
| LAS → IAD Las Vegas Harry Reid to Washington Dulles | 1,070 | 84% | 0.7% |
| LAS → BWI Las Vegas Harry Reid to Baltimore/Washington | 1,743 | 77% | 1.0% |
Questions
How often are flights from LAS to DCA on time?
73% of 728 scheduled flights from Las Vegas, NV to Washington, DC arrived within 15 minutes of schedule between September 2025 and August 2026. 1.0% were cancelled.
What is the best time of day to fly LAS to DCA?
Flights scheduled to leave at 11 a.m. were the most reliable (80% on time). The 9 a.m. departures were the least (64%).
Which airline is most on time from LAS to DCA?
American Airlines: 77% of its 364 flights on the route arrived on time. Southwest Airlines: 69%.
What month has the most delays from LAS to DCA?
July (59% on time). The best month is April (85%), over 2023–2026.
Related
- DCA → LAS (return)
- Las Vegas Harry Reid (LAS) delays by hour
- Flights into Washington Reagan National (DCA)
- American Airlines on-time record
- Southwest Airlines on-time record
- Connecting off this flight? Check the risk
Domestic flights by the airlines that report to the U.S. DOT, plus their regional partners. "On time" means arriving less than 15 minutes after schedule; cancelled and diverted flights count as not on time. Past performance is a guide, not a forecast. Method.