Route · SAT → BOS · 2020–2025 BTS data
San Antonio to Boston
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SAT to BOS (San Antonio to Boston) ranks #4501 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 64.2%
- On-time
- -14.8 pts
- vs US avg
- 88 min
- Delay when late
- 1,008
- Flights
- #4501 of 4927
- Corpus placement
Cancelled
1.4%
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 | 19 | 0 | 0 | DL |
| Sep 2025 | 30 | 23 | 0 | 0 | DL |
| Aug 2025 | 30 | 8 | 0 | 2 | DL |
| Jul 2025 | 30 | 14 | 0 | 0 | DL |
| Jun 2025 | 30 | 12 | 1 | 0 | DL |
| May 2025 | 31 | 13 | 1 | 0 | DL |
| Aug 2024 | 31 | 14 | 1 | 1 | B6 |
| Jul 2024 | 31 | 13 | 1 | 0 | B6 |
| Jun 2024 | 30 | 9 | 0 | 1 | B6 |
| May 2024 | 31 | 8 | 0 | 0 | B6 |
| Apr 2024 | 30 | 5 | 0 | 1 | B6 |
| Mar 2024 | 31 | 11 | 0 | 0 | B6 |
| Jan 2024 | 31 | 6 | 1 | 0 | B6 |
| Dec 2023 | 31 | 10 | 1 | 0 | B6 |
| Nov 2023 | 30 | 5 | 0 | 0 | B6 |
| Oct 2023 | 31 | 15 | 0 | 0 | B6 |
| Sep 2023 | 30 | 14 | 3 | 1 | B6 |
| Aug 2023 | 31 | 14 | 1 | 0 | B6 |
| Jul 2023 | 31 | 11 | 0 | 2 | B6 |
| Jun 2023 | 30 | 7 | 0 | 0 | B6 |
| May 2023 | 31 | 5 | 0 | 0 | B6 |
| Apr 2023 | 30 | 12 | 0 | 0 | B6 |
| Mar 2023 | 31 | 7 | 0 | 0 | B6 |
| Jan 2023 | 31 | 10 | 0 | 0 | B6 |
SAT–BOS seasonal on-time pattern
Best: November (81.7%) · weakest: October (51.1%)
Strongest calendar month
November
81.7% on-time · ~30 flights/mo
Busiest calendar month
January
~31 flights/mo avg
Weakest calendar month
October
51.1% on-time · ~31 flights/mo
Cancellation Rate
1.4%
10 of 733 flights
Diversion Rate
1.1%
8 of 733 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
SAT - San Antonio
Full on-time, delay-cause, and seasonal performance for San Antonio, TX.
SAT on-time profileBOS - Boston
Full on-time, delay-cause, and seasonal performance for Boston, MA.
BOS on-time profileCompare the two airports
See SAT and BOS side by side on delays, cancellations, and reliability.
Compare SAT vs BOSOrigin-hub reliability standing
Softer reliability from SAT
Among 31 routes leaving SAT, only 2 (including this one) clear below 75% on-time, while 17 stay ≥85% and 12 sit mid-band. Travelers comparing SAT options should weigh this 64.2% print against those peers · fleet on-time rank #4902 of 4927.
Similar routes
Other BTS-tracked routes with comparable performance or trip length to SAT–BOS.
Routes with a similar on-time rate
What the Data Says About SAT to BOS
San Antonio to Boston (SAT to BOS) sits among the less reliable pairings in the BTS dataset, on-time only 64.2% of the time across 1,008 flights, with a 87.9-minute average delay when service runs late. Carriers on this 1,764-mile route (2 total) show a 1.4% cancellation rate and 1.1% diversion rate over the last 24 months (10 of 733 flights cancelled).
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, SAT–BOS peaks in November at 81.7% on-time while January carries the heaviest traffic (~31 flights per month) ; the softest month is October at 51.1%, a 30.6-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does SAT to BOS rank among US routes by traffic? ▼
How often are flights delayed from SAT to BOS? ▼
What is the cancellation rate for SAT to BOS? ▼
How far is the flight from SAT to BOS? ▼
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 SAT–BOS data
SAT–BOS sits 14.8 pts below the national 79% average; check the seasonal chart and airport profiles before treating the headline as typical.
- Compare SAT and BOS airport profiles: delay causes and top routes differ even on the same corridor. SAT airport
- If your dates flex, November (81.7% on-time) beats October (51.1%) on this corridor. Seasonal chart
- 4 other routes post a similar 64.2% 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.