Route on-time record
LAS to DCA: most on-time flights and the best time to fly
Las Vegas (Harry Reid International Airport) to Washington (Ronald Reagan Washington National Airport). 730 nonstop flights in Jun 2025 to May 2026, 75% arrived within 15 minutes and 1.0% were cancelled. The most reliable flight number was American 3324 at 1:14 PM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
LAS → DCA
Las Vegas to Washington: 730 nonstop flights a year
On time (12 months)
75%
Cancelled
1.0%
avg delay 18 min
Best time to leave
Before 9 AM
83% on time vs 70% 9 AM to noon
Most reliable airline
American
77% chance on time
Lowest nonstop fare seen in the next two months: $268 (United 1627 on 2026-11-23). 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 3324
1:14 PM → 9:00 PM4h 46m nonstop
Local times, typical schedule. Last flown 2026-05-20.
84%
chance on time
- On time (history)
- 91%
- Cancelled
- 0.0%
- Avg arrival delay
- 6 min
- Arrived on time 91% of the time (44 flights, Jun 2025 to May 2026).
- Never cancelled in 44 scheduled flights.
- Departs inside LAS's trouble window: 51% of its 107 ground stops and delay programs started between 10 AM and 4 PM.
Limited track record · 44 flights
Find American 3324 fares Opens this date on Aviasales#2 · American 2019
11:42 AM → 7:25 PM4h 43m nonstop
Local times, typical schedule. Last flown 2026-05-31.
79%
chance on time
- On time (history)
- 82%
- Cancelled
- 0.0%
- Avg arrival delay
- 8 min
- Arrived on time 82% of the time (11 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (9 AM to noon: 70% on time; Before 9 AM: 83%).
- Departs 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 2019 fares Opens this date on Aviasales#3 · Southwest 3433
9:00 AM → 4:45 PM4h 45m nonstop
Local times, typical schedule. Last flown 2026-05-31.
70%
chance on time
- On time (history)
- 76%
- Cancelled
- 0.0%
- Avg arrival delay
- 11 min
- Arrived on time 76% of the time (54 flights, Jun 2025 to May 2026).
- Never cancelled in 54 scheduled flights.
- Leaves in this route's least on-time window (9 AM to noon: 70% on time; Before 9 AM: 83%).
- Departs outside LAS's trouble window (10 AM to 4 PM, when 51% of its 107 ground stops and delay programs started).
Limited track record · 54 flights
Find Southwest 3433 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- American Airlines77%
365 flights · 78% on time as flown · 1.3% cancel
- Southwest Airlines72%
365 flights · 72% on time as flown · 0.7% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM83%
87 flights · avg delay 9 min
- 9 AM to noon70%
309 flights · avg delay 15 min
- Noon to 3 PM78%
334 flights · avg delay 24 min
Best day: Saturday (83%). Worst: Monday (73%).
Smarter routing
Nearby airports that run more on time
LAS → IAD 87% chance on time
Harry Reid International Airport to Washington Dulles International Airport · 1,130 flights a year · 23 mi from your airports · yours: 74%
LAS → BWI 77% chance on time
Harry Reid International Airport to Baltimore/Washington International Thurgood Marshall Airport · 1,841 flights a year · 30 mi from your airports · yours: 74%
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
- Airline (crew, maintenance, boarding)42%
- Late-arriving aircraft28%
- Air traffic control and airport volume27%
- 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
LAS to DCA questions
- What time of day is best to fly LAS to DCA?
- Before 9 AM: 83% of flights arrived on time, against 70% for departures 9 AM to noon. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
- Which airline is most on time from LAS to DCA?
- American, with a season-adjusted 77% 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 LAS to DCA?
- June (64% on time); the best was April (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 LAS
- DCA to LAS (return)
- LAS to LAX 79%
- LAS to DEN 77%
- LAS to SAN 68%
- LAS to PHX 78%
- LAS to SFO 66%
- LAS to SEA 82%
- LAS to ORD 77%
- LAS to DFW 81%
- LAS to ATL 84%
- LAS to SNA 82%
- LAS to SMF 79%
- LAS to BUR 80%
Most on-time flights from LAS on every route →
Live status: FAA delays and ground stops