BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
IADLAS

Washington, DC (IAD) to Las Vegas, NV (LAS) flight delay odds

Historically, 84.7% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 1,108 flights.

HISTORICAL ROUTE SIGNALLower disruption
84.7%arrived on time
10.4%30+ min late
0.5%cancelled
1,108scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late5.2%all scheduled flights
120+ minutes late2.5%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival-2.6 mincompleted flights

When is this route most reliable?

The same route can behave differently through the day. These are scheduled departure windows, not actual departure times. Small time windows with fewer than 40 flights are withheld.

Departure windowFlightsOn time30+ minCancelled
Early morning18285.2%11.5%1.6%
Late morning23488.5%6.0%0.0%
Afternoon31687.3%6.3%0.3%
Evening32880.5%15.5%0.3%
Night4875.0%18.8%0.0%

Weekday comparison

Day-of-week results use at least 30 scheduled flights per row. Look for broad patterns, not tiny percentage differences.

DayFlightsOn time30+ minCancelled
Monday16381.6%15.3%0.6%
Tuesday14785.0%8.2%0.0%
Wednesday15187.4%9.3%0.0%
Thursday16386.5%9.2%0.0%
Friday16486.0%9.8%0.0%
Saturday15884.8%10.8%0.6%
Sunday16281.5%9.9%1.9%

Airline comparison

Marketing-carrier results make codeshare flights easier to compare as travelers buy them. Dedicated route-airline reports require at least 160 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines1,00986.3%9.0%0.5%
Frontier Airlines9967.7%24.2%0.0%

Monthly trend

Month-by-month results show whether a twelve-month average hides an unusual period.

MonthFlightsOn time30+ minCancelled
July 202512370.7%24.4%0.0%
August 202511979.0%13.4%0.0%
September 20259191.2%5.5%0.0%
October 20259387.1%8.6%0.0%
November 20258993.3%4.5%0.0%
December 20259291.3%6.5%0.0%
January 20269081.1%10.0%4.4%
February 20267490.5%5.4%0.0%
March 20268087.5%10.0%1.2%
April 20268195.1%2.5%0.0%
May 20268687.2%8.1%0.0%
June 20269071.1%17.8%0.0%

What drove reported delay minutes?

BTS cause minutes are reported for qualifying delayed flights. These shares describe recorded delay minutes—not the chance that a particular cause will affect your next flight.

Airline23.1%
Late aircraft46.2%
National airspace18.5%
Weather12.3%
Security0.0%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.