Route · STL → BWI · 2020–2025 BTS data
St. Louis to Baltimore
The STL–BWI corridor (St. Louis, MO → Baltimore, MD) runs ahead of the national average, served by 1 carrier across roughly 738 miles.
Data updated 2026-06-13
- 82.6%
- On-time
- +3.6 pts
- vs US avg
- 57 min
- Delay when late
- 6,869
- Flights
Cancelled
1.2%
Best Month
Feb 2024 95%
Worst Month
Jul 2024 65%
Distance
738 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 101 | 19 | 1 | 0 | WN |
| Nov 2025 | 107 | 19 | 0 | 0 | WN |
| Oct 2025 | 109 | 16 | 0 | 0 | WN |
| Sep 2025 | 116 | 24 | 0 | 0 | WN |
| Aug 2025 | 129 | 18 | 2 | 0 | WN |
| Jul 2025 | 127 | 34 | 3 | 0 | WN |
| Jun 2025 | 125 | 32 | 1 | 1 | WN |
| May 2025 | 129 | 29 | 2 | 0 | WN |
| Apr 2025 | 125 | 26 | 1 | 0 | WN |
| Mar 2025 | 104 | 17 | 1 | 0 | WN |
| Feb 2025 | 73 | 8 | 1 | 0 | WN |
| Jan 2025 | 73 | 9 | 6 | 0 | WN |
| Dec 2024 | 99 | 16 | 0 | 0 | WN |
| Nov 2024 | 104 | 14 | 0 | 0 | WN |
| Oct 2024 | 119 | 12 | 0 | 0 | WN |
| Sep 2024 | 115 | 14 | 0 | 0 | WN |
| Aug 2024 | 124 | 24 | 2 | 0 | WN |
| Jul 2024 | 145 | 51 | 0 | 0 | WN |
| Jun 2024 | 124 | 21 | 1 | 0 | WN |
| May 2024 | 124 | 27 | 0 | 0 | WN |
| Apr 2024 | 117 | 18 | 2 | 0 | WN |
| Mar 2024 | 104 | 18 | 0 | 0 | WN |
| Feb 2024 | 75 | 4 | 0 | 0 | WN |
| Jan 2024 | 85 | 6 | 9 | 0 | WN |
Cancellation Rate
1.2%
32 of 2,653 flights
Diversion Rate
0.0%
1 of 2,653 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.
Origin airport →BWI - Baltimore
Full on-time, delay-cause, and seasonal performance for Baltimore, MD.
Destination airport →Compare the two airports
See STL and BWI side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to STL–BWI.
Routes with a similar on-time rate
What the Data Says About STL to BWI
Bureau of Transportation Statistics records show St. Louis to Baltimore (STL to BWI) running a 82.6% on-time rate over 6,869 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 57.3 minutes. The 738-mile corridor is served by 1 carrier, and over the last 24 months 1.2% of 2,653 flights were cancelled, 0.0% diverted.
The monthly split is wide on this route: Feb 2024 posted the strongest performance at 95% on-time, while Jul 2024 came in at just 65% - a 30-point swing worth factoring into travel timing.
Frequently Asked Questions
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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.
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.