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Route Reliability

St. Louis → Jacksonville

STL–JAX · 753 miles · St. Louis Lambert International Airport to Jacksonville International Airport

87
Pretty Reliable
WanderNerd Reliability Score
80%
Arrive within 15 minutes
7 min
Average arrival delay
0.2%
Cancelled
552
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 552 flights. No comparison to make.

What the data says

Morning-you made the right choice.

STL–JAX flights departing between 6–9 AM arrived on time 92% of the time, versus 59% between 9 PM–12 AM.

Skip Monday if you can.

STL–JAX flights arrived on time 85% of the time on Tuesdays. On Mondays: 75%.

It basically never cancels.

Out of 552 scheduled flights, only 0.2% were cancelled.

Slipping a little lately.

STL–JAX flights arrived on time 75% of the time over the last three months in the data, compared with 80% in the three months before that.

Flights on this route

The breakdown

On-time by weekday
  • Mon75%(80 flights)
  • Tue85%(75 flights)
  • Wed84%(74 flights)
  • Thu77%(79 flights)
  • Fri84%(79 flights)
  • Sat77%(74 flights)
  • Sun76%(90 flights)
On-time by departure window
  • 6–9 AM92%(187 flights)
  • 9 AM–12 PM85%(68 flights)
  • 12–3 PM70%(33 flights)
  • 3–6 PM75%(12 flights)
  • 6–9 PM71%(234 flights)
  • 9 PM–12 AM59%(17 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%60
July 202577%62
August 202583%57
September 202580%56
October 202579%57
November 202587%54
December 202583%58
January 202667%18
February 202690%19
March 202672%32
April 202678%37
May 202676%41

Keep nerding

Based on 552 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.