Route · BWI → STL · 2020–2025 BTS data
Baltimore to St. Louis
The BWI–STL corridor (Baltimore, MD → St. Louis, MO) runs ahead of the national average, served by 1 carrier across roughly 738 miles.
Data updated 2026-06-13
- 79.5%
- On-time
- +0.5 pts
- vs US avg
- 58 min
- Delay when late
- 6,816
- Flights
Cancelled
0.9%
Best Month
Feb 2024 92%
Worst Month
Jul 2024 63%
Distance
738 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 101 | 24 | 2 | 0 | WN |
| Nov 2025 | 107 | 13 | 1 | 0 | WN |
| Oct 2025 | 106 | 19 | 0 | 0 | WN |
| Sep 2025 | 117 | 11 | 0 | 0 | WN |
| Aug 2025 | 129 | 19 | 2 | 0 | WN |
| Jul 2025 | 127 | 33 | 4 | 0 | WN |
| Jun 2025 | 124 | 28 | 1 | 1 | WN |
| May 2025 | 127 | 34 | 2 | 1 | WN |
| Apr 2025 | 123 | 23 | 0 | 0 | WN |
| Mar 2025 | 106 | 20 | 2 | 0 | WN |
| Feb 2025 | 71 | 11 | 0 | 0 | WN |
| Jan 2025 | 74 | 10 | 6 | 0 | WN |
| Dec 2024 | 99 | 20 | 0 | 1 | WN |
| Nov 2024 | 104 | 12 | 0 | 0 | WN |
| Oct 2024 | 119 | 11 | 0 | 0 | WN |
| Sep 2024 | 115 | 18 | 0 | 0 | WN |
| Aug 2024 | 124 | 39 | 1 | 0 | WN |
| Jul 2024 | 145 | 54 | 0 | 1 | WN |
| Jun 2024 | 124 | 33 | 0 | 0 | WN |
| May 2024 | 115 | 36 | 0 | 1 | WN |
| Apr 2024 | 111 | 25 | 0 | 0 | WN |
| Mar 2024 | 108 | 22 | 0 | 0 | WN |
| Feb 2024 | 83 | 7 | 0 | 0 | WN |
| Jan 2024 | 93 | 21 | 4 | 0 | WN |
Cancellation Rate
0.9%
25 of 2,652 flights
Diversion Rate
0.2%
5 of 2,652 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
BWI - Baltimore
Full on-time, delay-cause, and seasonal performance for Baltimore, MD.
Origin airport →STL - St. Louis
Full on-time, delay-cause, and seasonal performance for St. Louis, MO.
Destination airport →Compare the two airports
See BWI and STL side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to BWI–STL.
Routes with a similar on-time rate
What the Data Says About BWI to STL
6,816 tracked flights put the BWI to STL pairing (Baltimore to St. Louis) at a 79.5% on-time rate, squarely in line with the wider network. Delays that do occur run 57.6 minutes on average. Across the 738-mile route and its 1 carrier, the trailing 24 months show 0.9% cancelled and 0.2% diverted (2,652 flights sampled).
The monthly split is wide on this route: Feb 2024 posted the strongest performance at 92% on-time, while Jul 2024 came in at just 63% - a 29-point swing worth factoring into travel timing.
Frequently Asked Questions
How often are flights delayed from BWI to STL? ▼
What is the cancellation rate for BWI to STL? ▼
How far is the flight from BWI to STL? ▼
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Flight Guides
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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.