Route · PIT → STL · 2020–2025 BTS data
Pittsburgh to St. Louis
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), PIT to STL (Pittsburgh to St. Louis) ranks #4203 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 87.2%
- On-time
- +8.2 pts
- vs US avg
- 63 min
- Delay when late
- 1,434
- Flights
- #4203 of 4927
- Corpus placement
Cancelled
0.1%
Best Month
N/A
Worst Month
N/A
Distance
554 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 31 | 7 | 0 | 0 | WN |
| Nov 2025 | 31 | 2 | 0 | 0 | WN |
| Oct 2025 | 35 | 6 | 0 | 0 | WN |
| Sep 2025 | 34 | 3 | 0 | 0 | WN |
| Aug 2025 | 35 | 7 | 0 | 0 | WN |
| Jul 2025 | 35 | 5 | 0 | 0 | WN |
| Jun 2025 | 34 | 4 | 0 | 0 | WN |
| May 2025 | 31 | 9 | 0 | 0 | WN |
| Apr 2025 | 30 | 6 | 0 | 0 | WN |
| Mar 2025 | 31 | 3 | 0 | 0 | WN |
| Dec 2024 | 32 | 2 | 0 | 0 | WN |
| Nov 2024 | 30 | 1 | 0 | 0 | WN |
| Oct 2024 | 35 | 3 | 0 | 0 | WN |
| Sep 2024 | 34 | 2 | 0 | 0 | WN |
| Aug 2024 | 35 | 5 | 0 | 0 | WN |
| Jul 2024 | 35 | 11 | 0 | 0 | WN |
| Jun 2024 | 33 | 4 | 0 | 0 | WN |
| Jan 2024 | 31 | 4 | 1 | 0 | WN |
| Dec 2023 | 31 | 2 | 0 | 0 | WN |
| Nov 2023 | 30 | 2 | 0 | 0 | WN |
| Oct 2023 | 36 | 6 | 0 | 0 | WN |
| Sep 2023 | 33 | 0 | 0 | 0 | WN |
| Aug 2023 | 31 | 8 | 0 | 0 | WN |
| Jul 2023 | 31 | 7 | 0 | 0 | WN |
PIT–STL seasonal on-time pattern
Best: February (96.9%) · weakest: May (77.3%)
Strongest calendar month
February
96.9% on-time · ~32 flights/mo
Busiest calendar month
August
~42 flights/mo avg
Weakest calendar month
May
77.3% on-time · ~33 flights/mo
Cancellation Rate
0.1%
1 of 784 flights
Diversion Rate
0.0%
0 of 784 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
PIT - Pittsburgh
Full on-time, delay-cause, and seasonal performance for Pittsburgh, PA.
PIT on-time profileSTL - St. Louis
Full on-time, delay-cause, and seasonal performance for St. Louis, MO.
STL on-time profileCompare the two airports
See PIT and STL side by side on delays, cancellations, and reliability.
Compare PIT vs STLOrigin-hub reliability standing
Among PIT's stronger departures
PIT → STL posts a 87.2% on-time rate, landing in the ≥85% band with 13 of 33 BTS-tracked routes leaving Pittsburgh. The same hub also shows 19 mid-band and 1 challenged departures · fleet-wide on-time rank #600 of 4927 (highest on-time = #1).
Similar routes
Other BTS-tracked routes with comparable performance or trip length to PIT–STL.
Routes with a similar on-time rate
What the Data Says About PIT to STL
Pittsburgh to St. Louis (PIT to STL) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 87.2% on-time rate across 1,434 flights, with delays that do happen averaging 63.0 minutes. The corridor runs roughly 554 miles and is served by 1 carrier. Over the most recent 24 months, 1 of 784 flights were cancelled (0.1%) and 0 diverted (0.0%).
Monthly performance data for this route did not show a clear best/worst split in the sample window; review the monthly table above for period-by-period detail.
On the multi-year calendar, PIT–STL peaks in February at 96.9% on-time while August carries the heaviest traffic (~42 flights per month) ; the softest month is May at 77.3%, a 19.6-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does PIT to STL rank among US routes by traffic? ▼
How often are flights delayed from PIT to STL? ▼
What is the cancellation rate for PIT to STL? ▼
How far is the flight from PIT to STL? ▼
Airports on this route
Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Using PIT–STL data
PIT–STL runs 8.2 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.
- Compare PIT and STL airport profiles: delay causes and top routes differ even on the same corridor. PIT airport
- If your dates flex, February (96.9% on-time) beats May (77.3%) on this corridor. Seasonal chart
- 4 other routes post a similar 87.2% on-time rate; compare before you commit to this pairing. Similar routes
On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.