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Route Reliability

San Antonio → Las Vegas

SAT–LAS · 1,069 miles · San Antonio International Airport to Harry Reid International Airport

88
Pretty Reliable
WanderNerd Reliability Score
84%
Arrive within 15 minutes
1 min
Average arrival delay
0.5%
Cancelled
2,079
Flights in the data

Data through May 2026.

Who flies it best

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

  1. 1.Spirit Airlines85%246 flights
  2. 2.Southwest Airlines84%1,574 flights
  3. 3.Frontier Airlines82%259 flights

What the data says

Morning-you made the right choice.

SAT–LAS flights departing between 3–6 AM arrived on time 98% of the time, versus 69% between 9 PM–12 AM.

Friday is doing you no favors.

SAT–LAS flights arrived on time 91% of the time on Wednesdays and just 75% on Fridays. That gap is worth planning around.

Not much between Spirit Airlines and Frontier Airlines.

On this route they all land within 82% to 85% on time. Pick on schedule and price.

Slipping a little lately.

SAT–LAS flights arrived on time 79% of the time over the last three months in the data, compared with 84% in the three months before that.

Flights on this route

The breakdown

On-time by weekday
  • Mon83%(328 flights)
  • Tue91%(264 flights)
  • Wed91%(252 flights)
  • Thu79%(327 flights)
  • Fri75%(326 flights)
  • Sat90%(232 flights)
  • Sun82%(334 flights)
On-time by departure window
  • 3–6 AM98%(87 flights)
  • 6–9 AM96%(365 flights)
  • 9 AM–12 PM93%(305 flights)
  • 12–3 PM82%(474 flights)
  • 3–6 PM78%(347 flights)
  • 6–9 PM73%(332 flights)
  • 9 PM–12 AM69%(153 flights)
On-time trend by month
72%
May

Jun 85% → May 72% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202585%175
July 202590%176
August 202587%161
September 202579%188
October 202582%199
November 202590%194
December 202585%204
January 202684%137
February 202684%131
March 202685%164
April 202679%160
May 202672%174

Keep nerding

Based on 2,079 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.