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

Des Moines, IA (DSM) to Las Vegas, NV (LAS) flight delay odds

Historically, 79.1% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 594 flights.

HISTORICAL ROUTE SIGNALGenerally reliable
79.1%arrived on time
14.3%30+ min late
0.3%cancelled
594scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late7.6%all scheduled flights
120+ minutes late3.4%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+9.9 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 morning5979.7%18.6%0.0%
Late morning11188.3%9.0%0.9%
Afternoon35881.0%11.7%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
Monday10479.8%15.4%0.0%
Tuesday5481.5%13.0%0.0%
Wednesday7389.0%6.8%0.0%
Thursday10175.2%15.8%1.0%
Friday10478.8%12.5%0.0%
Saturday5481.5%11.1%0.0%
Sunday10473.1%21.2%1.0%

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
Southwest Airlines36583.0%10.1%0.5%
Allegiant Air22972.9%21.0%0.0%

Monthly trend

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

MonthFlightsOn time30+ minCancelled
July 20255369.8%22.6%1.9%
August 20255088.0%6.0%0.0%
September 20254783.0%12.8%0.0%
October 20255392.5%3.8%0.0%
November 20254787.2%10.6%0.0%
December 20255066.0%26.0%0.0%
January 20264879.2%16.7%0.0%
February 20264484.1%9.1%0.0%
March 20265381.1%13.2%1.9%
April 20264774.5%21.3%0.0%
May 20265174.5%15.7%0.0%
June 20265170.6%13.7%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.

Airline29.5%
Late aircraft26.9%
National airspace24.0%
Weather18.6%
Security1.1%
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.