Route · BOS → SAT · 2020–2025 BTS data
Boston to San Antonio
The BOS–SAT corridor (Boston, MA → San Antonio, TX) runs behind the national average, served by 2 carriers across roughly 1,764 miles.
Data updated 2026-06-13
- 76.7%
- On-time
- -2.3 pts
- vs US avg
- 66 min
- Delay when late
- 1,008
- Flights
Cancelled
1.0%
Best Month
N/A
Worst Month
N/A
Distance
1,764 mi
Carriers
2
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Oct 2025 | 30 | 7 | 0 | 0 | DL |
| Sep 2025 | 30 | 5 | 0 | 0 | DL |
| Aug 2025 | 30 | 3 | 0 | 0 | DL |
| Jul 2025 | 30 | 3 | 0 | 1 | DL |
| Jun 2025 | 30 | 7 | 1 | 0 | DL |
| May 2025 | 31 | 11 | 0 | 0 | DL |
| Aug 2024 | 31 | 3 | 3 | 0 | B6 |
| Jul 2024 | 31 | 7 | 0 | 0 | B6 |
| Jun 2024 | 30 | 6 | 0 | 0 | B6 |
| May 2024 | 31 | 8 | 0 | 0 | B6 |
| Apr 2024 | 30 | 10 | 0 | 0 | B6 |
| Mar 2024 | 31 | 12 | 0 | 0 | B6 |
| Jan 2024 | 31 | 7 | 0 | 0 | B6 |
| Dec 2023 | 31 | 6 | 1 | 0 | B6 |
| Nov 2023 | 30 | 5 | 0 | 0 | B6 |
| Oct 2023 | 31 | 12 | 0 | 0 | B6 |
| Sep 2023 | 30 | 6 | 2 | 0 | B6 |
| Aug 2023 | 31 | 11 | 0 | 0 | B6 |
| Jul 2023 | 31 | 7 | 0 | 0 | B6 |
| Jun 2023 | 30 | 7 | 0 | 0 | B6 |
| May 2023 | 31 | 4 | 0 | 0 | B6 |
| Apr 2023 | 30 | 10 | 0 | 0 | B6 |
| Mar 2023 | 31 | 7 | 0 | 0 | B6 |
| Jan 2023 | 31 | 5 | 0 | 0 | B6 |
Cancellation Rate
1.0%
7 of 733 flights
Diversion Rate
0.1%
1 of 733 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 →SAT - San Antonio
Full on-time, delay-cause, and seasonal performance for San Antonio, TX.
Destination airport →Compare the two airports
See BOS and SAT 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–SAT.
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What the Data Says About BOS to SAT
The Boston to San Antonio corridor (BOS to SAT) posts a 76.7% on-time rate on the lower edge of the average band, based on 1,008 tracked flights. Late flights run 66.4 minutes behind on average. 2 carriers cover the 1,764-mile route; over the last 24 months, 7 of 733 flights were cancelled (1.0%) and 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.
Frequently Asked Questions
How often are flights delayed from BOS to SAT? ▼
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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.