Route on-time record
DCA to LAS: most on-time flights and the best time to fly
Washington (Ronald Reagan Washington National Airport) to Las Vegas (Harry Reid International Airport). 730 nonstop flights in Jun 2025 to May 2026, 72% arrived within 15 minutes and 1.2% were cancelled. The most reliable flight number was American 2236 at 7:35 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
DCA → LAS
Washington to Las Vegas: 730 nonstop flights a year
On time (12 months)
72%
Cancelled
1.2%
avg delay 18 min
Best time to leave
Before 9 AM
90% on time vs 48% 3 to 6 PM
Most reliable airline
American
86% chance on time
Lowest nonstop fare seen in the next two months: $271 (Southwest 2232 on 2026-10-28). Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · American 2236
7:35 AM → 9:49 AM5h 14m nonstop
Local times, typical schedule. Last flown 2026-05-20.
92%
chance on time
- On time (history)
- 93%
- Cancelled
- 0.0%
- Avg arrival delay
- 3 min
- Arrived on time 93% of the time (44 flights, Jun 2025 to May 2026).
- Never cancelled in 44 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 90% on time; 3 to 6 PM: 48%).
- Departs outside DCA's trouble window (1 PM to 7 PM, when 63% of its 194 ground stops and delay programs started).
Limited track record · 44 flights
Find American 2236 fares Opens this date on Aviasales#2 · American 2051
8:20 AM → 10:28 AM5h 08m nonstop
Local times, typical schedule. Last flown 2026-05-31.
86%
chance on time
- On time (history)
- 82%
- Cancelled
- 0.0%
- Avg arrival delay
- 24 min
- Arrived on time 82% of the time (11 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 90% on time; 3 to 6 PM: 48%).
- Departs outside DCA's trouble window (1 PM to 7 PM, when 63% of its 194 ground stops and delay programs started).
- Lands inside LAS's trouble window: 51% of its 107 ground stops and delay programs started between 10 AM and 4 PM.
Limited track record · 11 flights
Find American 2051 fares Opens this date on Aviasales#3 · Southwest 3820
4:35 PM → 6:45 PM5h 10m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 3291; its record covers all of them.
52%
chance on time
- On time (history)
- 72%
- Cancelled
- 0.0%
- Avg arrival delay
- 18 min
- Arrived on time 72% of the time (32 flights, Jun 2025 to May 2026).
- Never cancelled in 32 scheduled flights.
- Leaves in this route's least on-time window (3 to 6 PM: 48% on time; Before 9 AM: 90%).
- Departs inside DCA's trouble window: 63% of its 194 ground stops and delay programs started between 1 PM and 7 PM.
Limited track record · 32 flights
Find Southwest 3820 fares Opens this date on Aviasales#4 · Southwest 1733
4:50 PM → 7:00 PM5h 10m nonstop
Local times, typical schedule. Last flown 2026-05-29.
40%
chance on time
- On time (history)
- 48%
- Cancelled
- 0.0%
- Avg arrival delay
- 36 min
- Arrived on time 48% of the time (23 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (3 to 6 PM: 48% on time; Before 9 AM: 90%).
- Departs inside DCA's trouble window: 63% of its 194 ground stops and delay programs started between 1 PM and 7 PM.
Limited track record · 23 flights
Find Southwest 1733 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- American Airlines86%
365 flights · 89% on time as flown · 1.3% cancel
- Southwest Airlines56%
365 flights · 54% on time as flown · 1.1% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM90%
284 flights · avg delay 7 min
- 9 AM to noon89%
121 flights · avg delay 10 min
- 3 to 6 PM48%
320 flights · avg delay 31 min
Best day: Saturday (86%). Worst: Thursday (75%).
Smarter routing
Nearby airports that run more on time
IAD → LAS 84% chance on time
Washington Dulles International Airport to Harry Reid International Airport · 1,129 flights a year · 23 mi from your airports · yours: 71%
BWI → LAS 79% chance on time
Baltimore/Washington International Thurgood Marshall Airport to Harry Reid International Airport · 1,846 flights a year · 30 mi from your airports · yours: 71%
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Late-arriving aircraft39%
- Airline (crew, maintenance, boarding)33%
- Air traffic control and airport volume25%
- Severe weather3%
Share of delay minutes by the cause airlines report to the US DOT.
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure
DCA to LAS questions
- What time of day is best to fly DCA to LAS?
- Before 9 AM: 90% of flights arrived on time, against 48% for departures 3 to 6 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
- Which airline is most on time from DCA to LAS?
- American, with a season-adjusted 86% chance of operating and arriving on time over 365 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on DCA to LAS?
- April (72% on time); the best was March (85%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from DCA
- LAS to DCA (return)
- DCA to BOS 71%
- DCA to ORD 74%
- DCA to ATL 78%
- DCA to LGA 67%
- DCA to MCO 74%
- DCA to BNA 77%
- DCA to MIA 75%
- DCA to DFW 77%
- DCA to IAH 81%
- DCA to DTW 76%
- DCA to CLT 78%
- DCA to MSP 78%
Most on-time flights from DCA on every route →
Live status: FAA delays and ground stops