Historical on-time performance
Washington to Las Vegas
2,089 miData through May 2026Source: US DOT · BTS
Flights on DCA–LAS arrive on time 70% of the time over the last 12 months.
On-time rate70%arrived within 15 min
p90 delay55 min1 in 10 flights is worse (tail risk)
Cancelled1.2%of scheduled flights
based on 674 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- American AirlinesbestOn-time88%Medianon timep9015 minCancel1.5%Flights337
- Southwest AirlinesOn-time52%Median10 minp9070 minCancel0.9%Flights337
Why flights run late
Delay causes
- Airline34%
- Weather3%
- Air traffic (NAS)22%
- Late aircraft40%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline13%
- Weather75%
- Air traffic (NAS)13%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 8 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly DCA → LAS
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 89% on time.
- Mornings89% on time · p90 15 min · 1,135 flights
- Afternoons46% on time · p90 75 min · 418 flights
Best day of week
Saturdays are the most reliable day to fly this route — 86% on time.
- Saturdays86% on time · p90 15 min · 222 flights
- Wednesdays78% on time · p90 35 min · 220 flights
- Mondays77% on time · p90 35 min · 223 flights
- Sundays76% on time · p90 40 min · 225 flights
- Tuesdays76% on time · p90 30 min · 220 flights
- Thursdays75% on time · p90 50 min · 225 flights
- Fridays74% on time · p90 55 min · 225 flights
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