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

Seattle, WA (SEA) to Las Vegas, NV (LAS) flight delay odds

Historically, 77.0% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 5,650 flights.

HISTORICAL ROUTE SIGNALGenerally reliable
77.0%arrived on time
13.5%30+ min late
0.8%cancelled
5,650scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late5.8%all scheduled flights
120+ minutes late1.6%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival+5.8 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 morning1,15189.8%5.5%1.2%
Late morning96780.9%10.8%0.3%
Afternoon1,88273.3%15.3%1.0%
Evening1,45770.8%18.3%0.6%
Night19362.7%22.3%1.0%

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
Monday86773.5%15.1%0.9%
Tuesday77281.5%9.8%0.4%
Wednesday73780.9%10.0%0.3%
Thursday84874.4%15.8%0.7%
Friday85072.5%17.8%1.8%
Saturday72482.3%10.4%0.6%
Sunday85275.5%14.4%1.1%

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
Alaska Airlines2,63877.1%13.3%0.9%
Delta Air Lines1,73882.7%9.8%0.9%
Southwest Airlines97668.9%18.1%0.5%
Frontier Airlines24667.1%24.0%1.2%
Spirit Airlines4367.4%18.6%0.0%
SkyWest Airlines9100.0%0.0%0.0%

Monthly trend

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

MonthFlightsOn time30+ minCancelled
July 202552168.3%20.9%0.8%
August 202548774.7%14.6%0.0%
September 202544075.2%14.8%0.0%
October 202548774.3%13.3%2.5%
November 202544578.2%11.5%1.6%
December 202546873.5%15.2%0.4%
January 202646081.3%12.0%0.7%
February 202641582.7%9.2%0.2%
March 202647874.7%13.4%2.7%
April 202647684.0%9.2%0.2%
May 202649778.1%13.9%0.8%
June 202647680.0%13.0%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.

Airline39.9%
Late aircraft32.4%
National airspace25.5%
Weather1.5%
Security0.7%
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.