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Route Reliability

St. Louis → Sacramento

STL–SMF · 1,679 miles · St. Louis Lambert International Airport to Sacramento International Airport

88
Pretty Reliable
WanderNerd Reliability Score
80%
Arrive within 15 minutes
6 min
Average arrival delay
0%
Cancelled
331
Flights in the data

Data through May 2026.

Southwest Airlines is the only airline in this data on this route, arriving on time 80% of the time across 331 flights. No comparison to make.

What the data says

Morning flights do better here.

STL–SMF flights departing between 9 AM–12 PM arrived on time 97% of the time, versus 57% between 6–9 PM.

Sunday scaries are real for this one.

STL–SMF flights arrived on time 89% of the time on Tuesdays and just 69% on Sundays. That gap is worth planning around.

It basically never cancels.

Out of 331 scheduled flights, only 0.0% were cancelled.

Trending in the right direction.

STL–SMF flights arrived on time 84% of the time over the last three months in the data, compared with 74% in the three months before that.

Flights on this route

The breakdown

On-time by weekday
  • Mon76%(49 flights)
  • Tue89%(44 flights)
  • Wed79%(43 flights)
  • Thu88%(48 flights)
  • Fri84%(49 flights)
  • Sat77%(47 flights)
  • Sun69%(51 flights)
On-time by departure window
  • 6–9 AM88%(74 flights)
  • 9 AM–12 PM97%(29 flights)
  • 12–3 PM87%(95 flights)
  • 3–6 PM69%(98 flights)
  • 6–9 PM57%(35 flights)
On-time trend by month
87%
May

Jun 73% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202573%30
July 202584%31
August 202587%31
September 202597%30
October 202561%31
November 202576%29
December 202565%31
January 202670%10
February 202689%18
March 202679%29
April 202687%30
May 202687%31

Keep nerding

Based on 331 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.