Delta Air Lines SAT to BOS on-time performance
Delta Air Lines nonstop flights from San Antonio to Boston · Aug 2025 – Jul 2026
On-time arrivals
60%
arrived < 15 min late
Cancelled
2.2%
8 flights
Avg arrival delay
33 min
81 min when late
Rank on route
#1 of 1
route average 60% on time
Key facts
- Delta Air Lines flights on SAT to BOS arrived on time 60% of the time in Aug 2025 – Jul 2026.
- 2.2% were cancelled, and 20% arrived an hour or more late.
- That ranks #1 of 1 airlines on this route, which averaged 60% on time overall.
- The largest source of delay minutes was late-arriving aircraft (41%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft41%
- Air traffic control & airport congestion39%
- Airline (crew, maintenance, cleaning, fueling)17%
- Extreme weather3%
- Security0%
Other airlines on SAT to BOS
356 Delta Air Lines flights tracked on this route; 8 cancelled, 4 diverted.
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. How we calculate this.