Skip to content
WanderNerd
Check a flight

Route Reliability

St. Louis → Pittsburgh

STL–PIT · 554 miles · St. Louis Lambert International Airport to Pittsburgh International Airport

86
Pretty Reliable
WanderNerd Reliability Score
80%
Arrive within 15 minutes
6 min
Average arrival delay
0.2%
Cancelled
455
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 455 flights. No comparison to make.

What the data says

Morning-you made the right choice.

STL–PIT flights departing between 6–9 AM arrived on time 91% of the time, versus 55% between 9 PM–12 AM.

Sunday scaries are real for this one.

STL–PIT flights arrived on time 89% of the time on Tuesdays and just 67% on Sundays. That gap is worth planning around.

It basically never cancels.

Out of 455 scheduled flights, only 0.2% were cancelled.

Recent months have been rougher.

STL–PIT flights arrived on time 73% of the time over the last three months in the data, compared with 87% in the three months before that.

Flights on this route

The breakdown

On-time by weekday
  • Mon78%(63 flights)
  • Tue89%(64 flights)
  • Wed86%(64 flights)
  • Thu83%(65 flights)
  • Fri86%(65 flights)
  • Sat70%(47 flights)
  • Sun67%(85 flights)
On-time by departure window
  • 6–9 AM91%(102 flights)
  • 9 AM–12 PM85%(92 flights)
  • 12–3 PM84%(74 flights)
  • 3–6 PM71%(17 flights)
  • 6–9 PM70%(157 flights)
  • 9 PM–12 AM55%(11 flights)
On-time trend by month
71%
May

Jun 68% → May 71% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202568%34
July 202577%34
August 202591%35
September 202591%34
October 202574%35
November 202590%31
December 202581%31
January 202685%27
February 202696%27
March 202669%54
April 202680%56
May 202671%55

Keep nerding

Based on 455 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.