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Route Reliability

Kansas City → Las Vegas

MCI–LAS · 1,139 miles · Kansas City International Airport to Harry Reid International Airport

87
Pretty Reliable
WanderNerd Reliability Score
82%
Arrive within 15 minutes
3 min
Average arrival delay
0.5%
Cancelled
1,986
Flights in the data

Data through May 2026.

Who flies it best

Ranked by on-time arrivals. Historical results, not predictions.

  1. 1.Spirit Airlines86%298 flights
  2. 2.Southwest Airlines81%1,686 flights

Not enough history to rank: American Airlines (2 flights). We rank airlines only after 100 flights on the route.

What the data says

Morning flights do better here.

MCI–LAS flights departing between 6–9 AM arrived on time 95% of the time, versus 68% between 9 PM–12 AM.

Monday is the weak spot.

MCI–LAS flights arrived on time 90% of the time on Wednesdays. On Mondays: 77%.

Spirit Airlines has a slight edge here.

Spirit Airlines arrived on time 86% of the time on this route; Southwest Airlines managed 81%.

Slipping a little lately.

MCI–LAS flights arrived on time 79% of the time over the last three months in the data, compared with 85% in the three months before that.

Flights on this route

The breakdown

On-time by weekday
  • Mon77%(307 flights)
  • Tue83%(274 flights)
  • Wed90%(266 flights)
  • Thu78%(302 flights)
  • Fri79%(306 flights)
  • Sat90%(209 flights)
  • Sun81%(308 flights)
On-time by departure window
  • 3–6 AM95%(154 flights)
  • 6–9 AM95%(372 flights)
  • 9 AM–12 PM91%(308 flights)
  • 12–3 PM80%(415 flights)
  • 3–6 PM69%(304 flights)
  • 6–9 PM71%(307 flights)
  • 9 PM–12 AM68%(112 flights)
On-time trend by month
76%
May

Jun 77% → May 76% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202577%157
July 202579%159
August 202585%159
September 202584%148
October 202582%182
November 202585%169
December 202581%173
January 202687%165
February 202687%157
March 202686%181
April 202674%168
May 202676%154

Keep nerding

Based on 1,986 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.