Route · BOS → SAT · 2020–2025 BTS data
Boston to San Antonio
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), BOS to SAT (Boston to San Antonio) ranks #4500 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 76.7%
- On-time
- -2.3 pts
- vs US avg
- 66 min
- Delay when late
- 1,008
- Flights
- #4500 of 4927
- Corpus placement
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 |
BOS–SAT seasonal on-time pattern
Best: July (82.9%) · weakest: April (63.3%)
Strongest calendar month
July
82.9% on-time · ~31 flights/mo
Busiest calendar month
January
~31 flights/mo avg
Weakest calendar month
April
63.3% on-time · ~30 flights/mo
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.
BOS on-time profileSAT - San Antonio
Full on-time, delay-cause, and seasonal performance for San Antonio, TX.
SAT on-time profileCompare the two airports
See BOS and SAT side by side on delays, cancellations, and reliability.
Compare BOS vs SATOrigin-hub reliability standing
Mid-pack among BOS departures
From BOS, this corridor sits with 49 other 75–85% on-time routes out of 60 tracked departures, not the hub's reliability leaders (6 at ≥85%) and not the softest ( 5 below 75%). Destination: San Antonio · fleet on-time rank #4151 of 4927.
Similar routes
Other BTS-tracked routes with comparable performance or trip length to BOS–SAT.
Routes with a similar on-time rate
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.
On the multi-year calendar, BOS–SAT peaks in July at 82.9% on-time while January carries the heaviest traffic (~31 flights per month) ; the softest month is April at 63.3%, a 19.6-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does BOS to SAT rank among US routes by traffic? ▼
How often are flights delayed from BOS to SAT? ▼
What is the cancellation rate for BOS to SAT? ▼
How far is the flight from BOS to SAT? ▼
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 BOS–SAT data
BOS–SAT is mid-pack at 76.7% on-time; month and carrier mix move more than the corridor headline.
- Compare BOS and SAT airport profiles: delay causes and top routes differ even on the same corridor. BOS airport
- If your dates flex, July (82.9% on-time) beats April (63.3%) on this corridor. Seasonal chart
- 4 other routes post a similar 76.7% 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.