DL1780Delta Air LinesIn the air, 50 min late
Left BOS at 09:30, 50 min after its 08:40 slot.
- Landing
- 13:47SJU board estimate · sched 13:43
live
Direct flights from Boston (BOS) to San Juan (SJU): 20 nonstop departures observed each week across 2 airlines. 40% of the last 15 tracked flights arrived within 15 minutes of schedule. The median arrival is 11 minutes late. 4 of the 21 tracked flights were cancelled. The nonstop covers 2,702 km, an estimated 3 hours 58 minutes in the air. Measured by Pro Flight Search from live flight boards at Boston and San Juan. Updated 15 November 2026 at 18:10 UTC.
Today, BOS → SJU
Sun 15 Nov · local times- 08:40 B6861JetBlue Left 08:40 ·
- 08:40 DL1780Delta Air Lines Left 09:30 +50 SJU est. 13:47In the air · sched 13:43
- 20:08 B6561JetBlue On scheduleGate C12 · TC ·
Checked BOS board 13:10 · SJU board 10:33
BOS
Boston
smooth · +0
SJU
San Juan
smooth · +0
2,702 km · ~3h 58m est.
Runs rough · 2 airlines · 20x weekly · nonstop
40% on time
of the last 15 tracked BOS → SJU flights arrived within 15 minutes
Median arrival delay is +11 min. 4 of 21 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival+11 minacross the last 11 arrivals
Flight time~3h 58mestimated from route distance
Weekly departures20x2 direct airlines on the leg
Cancelled19.0%recent route rate · 4 of 21
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Delta Air LinesJetBlue Airways
Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.
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 SJU: a 49% chance of a 15+ minute delay. In this weather, the more delayed of the two airports is typically about +28 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 Boston to San Juan route actually runs
Pro Flight Search records official board updates for nonstop BOS to SJU 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: Boston (BOS) to San Juan (SJU) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/BOS-SJU
BOS to SJU questions
Is BOS–SJU 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.
Morning or evening flight on BOS–SJU?
Operators schedule morning departures around 08:40 and evening departures around 20:08 from BOS. Earlier flights typically land before destination-airport delays accumulate later in the day; check the SJU delay card to confirm conditions when you'd arrive.
How long is the flight from BOS to SJU?
Great-circle distance is 2,702 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 221–262 min gate-to-gate on this route.
How often does BOS–SJU fly?
2 carriers operate this route, around 20 flights a week between them. Compare carrier days and times in the airline list above.
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