Historical on-time performance
Washington to Las Vegas
Flights on IAD–LAS arrive on time 85% of the time over the last 12 months.
based on 1,066 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Not enough comparable data to name a most-on-time carrier — low-data carriers aren't ranked.
- United AirlinesOn-time85%Medianon timep9025 minCancel0.5%Flights1,035
- Frontier AirlinesOn-time74%Medianon timep9080 minCancel0.0%Flights31
Why flights run late
Delay causes
- Airline23%
- Weather17%
- Air traffic (NAS)18%
- Late aircraft42%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline20%
- Weather80%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 5 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 IAD → LAS
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 75% to 89% on time.
- Mornings89% on time · p90 15 min · 1,210 flights
- Middays87% on time · p90 15 min · 681 flights
- Evenings75% on time · p90 60 min · 992 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 79% to 87% on time.
- Wednesdays87% on time · p90 25 min · 421 flights
- Tuesdays86% on time · p90 25 min · 411 flights
- Saturdays83% on time · p90 30 min · 432 flights
- Thursdays82% on time · p90 40 min · 447 flights
- Mondays82% on time · p90 35 min · 453 flights
- Sundays81% on time · p90 45 min · 446 flights
- Fridays79% on time · p90 45 min · 448 flights
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