BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
SAT→BOS

San Antonio, TX (SAT) to Boston, MA (BOS) flight delay odds

58.9% of 355 official scheduled SAT-to-BOS flights arrived on time; 26.5% arrived at least 30 minutes late and 2.3% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALVariable
58.9%arrived on time
26.5%30+ min late
2.3%cancelled
355scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late18.9%all scheduled flights
120+ minutes late8.2%all scheduled flights
Diverted1.1%did not reach as scheduled
Average arrival+26.1 mincompleted flights

Which departure time was most reliable for SAT to BOS?

Only Afternoon met the SAT-to-BOS departure window threshold: 58.9% of 355 scheduled flights arrived on time during July 2025–June 2026.

Departure windowFlightsOn time30+ minCancelled
Afternoon35558.9%26.5%2.3%

Which weekday was most reliable for SAT to BOS?

Among qualifying SAT-to-BOS weekday results, Saturday had the highest on-time rate: 71.4% of 49 flights. Friday was lowest at 46.9% across 49 flights.

DayFlightsOn time30+ minCancelled
Monday5263.5%21.2%5.8%
Tuesday5354.7%24.5%0.0%
Wednesday5253.8%36.5%1.9%
Thursday4957.1%22.4%4.1%
Friday4946.9%38.8%0.0%
Saturday4971.4%22.4%0.0%
Sunday5164.7%19.6%3.9%

Which airline was most reliable for SAT to BOS?

Only Delta Air Lines met the SAT-to-BOS airline threshold: 58.9% of 355 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Delta Air Lines35558.9%26.5%2.3%

Which month was most reliable for SAT to BOS?

Among qualifying SAT-to-BOS month results, January 2026 had the highest on-time rate: 75.9% of 29 flights. September 2025 was lowest at 23.3% across 30 flights.

MonthFlightsOn time30+ minCancelled
July 20253053.3%36.7%0.0%
August 20253066.7%20.0%0.0%
September 20253023.3%60.0%0.0%
October 20253036.7%56.7%0.0%
November 20252867.9%17.9%3.6%
December 20252864.3%17.9%3.6%
January 20262975.9%13.8%3.4%
February 20262857.1%14.3%3.6%
March 20263174.2%16.1%0.0%
April 20263063.3%20.0%3.3%
May 20263164.5%16.1%3.2%
June 20263060.0%26.7%6.7%

What drove SAT to BOS delay minutes?

National airspace was the largest recorded SAT-to-BOS delay category, accounting for 45.8% of 10,697 BTS-attributed delay minutes during July 2025–June 2026.

Airline16.7%
Late aircraft34.3%
National airspace45.8%
Weather3.2%
Security0.0%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.