Route · BOS → STL · 2020–2025 BTS data
Boston to St. Louis
The BOS–STL corridor (Boston, MA → St. Louis, MO) runs ahead of the national average, served by 13 carriers across roughly 1,047 miles.
Data updated 2026-06-13
- 82.8%
- On-time
- +3.8 pts
- vs US avg
- 68 min
- Delay when late
- 7,253
- Flights
Cancelled
1.3%
Best Month
Feb 2024 96%
Worst Month
Oct 2025 65%
Distance
1,047 mi
Carriers
13
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 146 | 41 | 1 | 0 | YX,WN,MQ |
| Nov 2025 | 142 | 21 | 1 | 0 | MQ,WN,YX |
| Oct 2025 | 150 | 52 | 1 | 1 | WN,YX,MQ |
| Sep 2025 | 142 | 40 | 2 | 0 | MQ,WN,YX |
| Aug 2025 | 145 | 27 | 0 | 0 | WN,MQ |
| Jul 2025 | 149 | 39 | 2 | 2 | WN,MQ |
| Jun 2025 | 146 | 42 | 2 | 0 | WN,YX,MQ |
| May 2025 | 149 | 22 | 1 | 1 | WN,YX,MQ |
| Apr 2025 | 139 | 23 | 0 | 0 | MQ,WN,YX |
| Mar 2025 | 117 | 17 | 0 | 0 | WN,YX,MQ |
| Feb 2025 | 88 | 16 | 3 | 0 | WN,YX,MQ |
| Jan 2025 | 102 | 16 | 11 | 0 | WN,YX,MQ |
| Dec 2024 | 131 | 17 | 2 | 0 | MQ,WN,YX |
| Nov 2024 | 131 | 12 | 0 | 0 | MQ,WN,YX |
| Oct 2024 | 148 | 22 | 0 | 0 | MQ,WN |
| Sep 2024 | 142 | 24 | 0 | 0 | WN,MQ |
| Aug 2024 | 144 | 32 | 5 | 0 | MQ,WN |
| Jul 2024 | 145 | 42 | 0 | 1 | MQ,WN |
| Jun 2024 | 138 | 27 | 2 | 0 | MQ,WN |
| May 2024 | 142 | 33 | 0 | 0 | MQ,WN,YX |
| Apr 2024 | 123 | 22 | 0 | 0 | MQ,WN,YX |
| Mar 2024 | 115 | 12 | 0 | 0 | MQ,WN |
| Feb 2024 | 112 | 5 | 1 | 0 | MQ,WN |
| Jan 2024 | 120 | 20 | 7 | 1 | MQ,WN |
Cancellation Rate
1.3%
41 of 3,206 flights
Diversion Rate
0.2%
6 of 3,206 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
BOS - Boston
Full on-time, delay-cause, and seasonal performance for Boston, MA.
Origin airport →STL - St. Louis
Full on-time, delay-cause, and seasonal performance for St. Louis, MO.
Destination airport →Compare the two airports
See BOS 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 BOS–STL.
Routes with a similar on-time rate
What the Data Says About BOS to STL
Bureau of Transportation Statistics records show Boston to St. Louis (BOS to STL) running a 82.8% on-time rate over 7,253 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 67.6 minutes. The 1,047-mile corridor is served by 13 carriers, and over the last 24 months 1.3% of 3,206 flights were cancelled, 0.2% diverted.
The monthly split is wide on this route: Feb 2024 posted the strongest performance at 96% on-time, while Oct 2025 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.