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Route Reliability

Sacramento → St. Louis

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

92
Nerd Approved
WanderNerd Reliability Score
84%
Arrive within 15 minutes
3 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 84% of the time across 331 flights. No comparison to make.

What the data says

Morning flights do better here.

SMF–STL flights departing between 6–9 AM arrived on time 96% of the time, versus 75% between 12–3 PM.

Thursdays have been rough.

SMF–STL flights arrived on time 95% of the time on Wednesdays and just 77% on Thursdays. That gap is worth planning around.

It basically never cancels.

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

Recent months have been rougher.

SMF–STL flights arrived on time 76% of the time over the last three months in the data, compared with 90% in the three months before that.

Flights on this route

The breakdown

On-time by weekday
  • Mon80%(49 flights)
  • Tue77%(44 flights)
  • Wed95%(43 flights)
  • Thu77%(48 flights)
  • Fri78%(49 flights)
  • Sat94%(47 flights)
  • Sun86%(51 flights)
On-time by departure window
  • 3–6 AM—(6 flights)
  • 6–9 AM96%(70 flights)
  • 9 AM–12 PM88%(105 flights)
  • 12–3 PM75%(150 flights)
On-time trend by month
74%
May

Jun 90% → May 74% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202590%30
July 202590%31
August 202590%31
September 202580%30
October 202584%31
November 202583%29
December 202581%31
January 202690%10
February 2026100%18
March 202679%29
April 202673%30
May 202674%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.