Route · STL → PIT · 2020–2025 BTS data
St. Louis to Pittsburgh
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), STL to PIT (St. Louis to Pittsburgh) ranks #4129 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 82.4%
- On-time
- +3.4 pts
- vs US avg
- 62 min
- Delay when late
- 1,529
- Flights
- #4129 of 4927
- Corpus placement
Cancelled
0.3%
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 | 6 | 0 | 0 | WN |
| Nov 2025 | 31 | 3 | 0 | 0 | WN |
| Oct 2025 | 35 | 9 | 0 | 0 | WN |
| Sep 2025 | 34 | 3 | 0 | 0 | WN |
| Aug 2025 | 35 | 3 | 0 | 0 | WN |
| Jul 2025 | 35 | 8 | 1 | 0 | WN |
| Jun 2025 | 34 | 12 | 0 | 0 | WN |
| May 2025 | 31 | 10 | 0 | 0 | WN |
| Apr 2025 | 30 | 4 | 0 | 0 | WN |
| Mar 2025 | 31 | 7 | 0 | 0 | WN |
| Dec 2024 | 32 | 5 | 0 | 0 | WN |
| Nov 2024 | 30 | 5 | 0 | 0 | WN |
| Oct 2024 | 35 | 1 | 0 | 0 | WN |
| Sep 2024 | 34 | 3 | 0 | 0 | WN |
| Aug 2024 | 35 | 3 | 1 | 0 | WN |
| Jul 2024 | 35 | 8 | 0 | 0 | WN |
| Jun 2024 | 34 | 10 | 0 | 0 | WN |
| May 2024 | 31 | 13 | 0 | 0 | WN |
| Apr 2024 | 30 | 6 | 0 | 0 | WN |
| Mar 2024 | 31 | 5 | 0 | 1 | WN |
| Jan 2024 | 31 | 8 | 0 | 0 | WN |
| Dec 2023 | 31 | 1 | 0 | 0 | WN |
| Nov 2023 | 30 | 3 | 0 | 0 | WN |
| Oct 2023 | 36 | 4 | 0 | 0 | WN |
STL–PIT seasonal on-time pattern
Best: September (93.5%) · weakest: June (65.3%)
Strongest calendar month
September
93.5% on-time · ~35 flights/mo
Busiest calendar month
August
~42 flights/mo avg
Weakest calendar month
June
65.3% on-time · ~33 flights/mo
Cancellation Rate
0.3%
2 of 782 flights
Diversion Rate
0.1%
1 of 782 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
STL - St. Louis
Full on-time, delay-cause, and seasonal performance for St. Louis, MO.
STL on-time profilePIT - Pittsburgh
Full on-time, delay-cause, and seasonal performance for Pittsburgh, PA.
PIT on-time profileCompare the two airports
See STL and PIT side by side on delays, cancellations, and reliability.
Compare STL vs PITOrigin-hub reliability standing
Mid-pack among STL departures
From STL, this corridor sits with 45 other 75–85% on-time routes out of 51 tracked departures, not the hub's reliability leaders (5 at ≥85%) and not the softest ( 1 below 75%). Destination: Pittsburgh · fleet on-time rank #2209 of 4927.
Similar routes
Other BTS-tracked routes with comparable performance or trip length to STL–PIT.
Routes with a similar on-time rate
What the Data Says About STL to PIT
Bureau of Transportation Statistics records show St. Louis to Pittsburgh (STL to PIT) running a 82.4% on-time rate over 1,529 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 61.9 minutes. The 554-mile corridor is served by 1 carrier, and over the last 24 months 0.3% of 782 flights were cancelled, 0.1% diverted.
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, STL–PIT peaks in September at 93.5% on-time while August carries the heaviest traffic (~42 flights per month) ; the softest month is June at 65.3%, a 28.2-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does STL to PIT rank among US routes by traffic? ▼
How often are flights delayed from STL to PIT? ▼
What is the cancellation rate for STL to PIT? ▼
How far is the flight from STL to PIT? ▼
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 STL–PIT data
STL–PIT runs 3.4 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.
- Compare STL and PIT airport profiles: delay causes and top routes differ even on the same corridor. STL airport
- If your dates flex, September (93.5% on-time) beats June (65.3%) on this corridor. Seasonal chart
- 4 other routes post a similar 82.4% 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.