Delta Air LinesDL40% on time
Flights DL816 varies daily
live
Direct flights from San Antonio (SAT) to Boston (BOS): 7 nonstop departures observed each week across 1 airline. 40% of the last 5 tracked flights arrived within 15 minutes of schedule. The median arrival is 31 minutes late. No cancellations were recorded across the 5 tracked flights. The nonstop covers 2,836 km, an estimated 4 hours 8 minutes in the air. Measured by Pro Flight Search from live flight boards at San Antonio and Boston. Updated 12 November 2026 at 09:52 UTC.
Today, SAT → BOS
Thu 12 Nov · local times- 14:01 DL816DELTA On scheduleGate A3 · TA ·
Checked SAT board 03:52 · BOS board 04:24
SAT
San Antonio
smooth · +0
BOS
Boston
smooth · +0
2,836 km · ~4h 08m est.
Runs rough · 1 airline · 7x weekly · nonstop
40% on time
of the last 5 tracked SAT → BOS flights arrived within 15 minutes
Median arrival delay is +31 min. 0 of 5 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival+31 minacross the last 5 arrivals
Flight time~4h 08mestimated from route distance
Weekly departures7x1 direct airline on the leg
Who flies it
observed on the boards · 7 daysHistory
operated legs · board outcomesActual board outcomes rather than schedules, paired departure and arrival per flight and day.
Full board history, day by day →
Airports right now
live boardsWeather lens
Conditions are tightest at BOS: a 35% chance of a 15+ minute delay. In this weather, the more delayed of the two airports is typically about +3 min. Both figures come from the two airports' delay records in similar weather. See live delays → · Weather risk by airport →
next sweep in 120s
How the San Antonio to Boston route actually runs
Pro Flight Search records official board updates for nonstop SAT to BOS flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.
Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Cite this data
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Suggested citation
Pro Flight Search: San Antonio (SAT) to Boston (BOS) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/SAT-BOS
SAT to BOS questions
Is SAT–BOS running on time right now?
Smooth skies ahead. Both endpoints currently score the same, route health score 100/100. The airports section above carries the live status and delay window at both ends.
How long is the flight from SAT to BOS?
Great-circle distance is 2,836 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 230–273 min gate-to-gate on this route.
How often does SAT–BOS fly?
Delta Air Lines runs the route with about 7 flights a week (daily). Since one carrier owns the route, a single disruption tends to ripple through the day.
What does the route health score measure?
A blend of departure-side delay at SAT and arrival-side delay at BOS, computed from rolling delay windows (refreshed every 40 minutes) with a daily-rollup fallback. Current MVFR, IFR, or LIFR endpoint weather caps the score when flight rules can limit throughput. Higher is healthier: 100 means operations are clean at both ends.
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