Route Reliability
Pittsburgh → St. Louis
PIT–STL · 554 miles · Pittsburgh International Airport to St. Louis Lambert International Airport
- 85%
- Arrive within 15 minutes
- 0 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 85% of the time across 455 flights. No comparison to make.
What the data says
Morning-you made the right choice.
PIT–STL flights departing between 6–9 AM arrived on time 99% of the time, versus 60% between 6–9 PM.
Sunday scaries are real for this one.
PIT–STL flights arrived on time 95% of the time on Tuesdays and just 77% 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.
PIT–STL flights arrived on time 80% 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
- Mon83%(64 flights)
- Tue95%(64 flights)
- Wed84%(64 flights)
- Thu83%(65 flights)
- Fri82%(65 flights)
- Sat94%(47 flights)
- Sun77%(85 flights)
- 3–6 AM—(1 flights)
- 6–9 AM99%(143 flights)
- 9 AM–12 PM93%(29 flights)
- 12–3 PM90%(107 flights)
- 3–6 PM83%(64 flights)
- 6–9 PM60%(109 flights)
- 9 PM–12 AM—(1 flights)
Jun 88% → May 80% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 88% | 34 |
| July 2025 | 86% | 35 |
| August 2025 | 83% | 35 |
| September 2025 | 91% | 34 |
| October 2025 | 83% | 35 |
| November 2025 | 94% | 31 |
| December 2025 | 81% | 31 |
| January 2026 | 89% | 26 |
| February 2026 | 93% | 27 |
| March 2026 | 76% | 54 |
| April 2026 | 84% | 56 |
| May 2026 | 80% | 56 |
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.