Morning rush
7.2 min 844 trips · 99% on paceOBSERVED MBTA TRAVEL TIME · 30 SERVICE DAYS
Back BaytoStony Brook
Orange Line
A direct MBTA train from Back Bay to Stony Brook took a median 7.2 minutes across 4,122 observed trips; 90% of measured rides finished within approximately 8.2 minutes.
Source: MBTA Performance Data · 2026-08-20 to 2026-09-18 · Completed direct trips only
Typical7.2 min50th percentile
Slower trip8.2 min90th percentile
Scheduled9.2 minmedian timetable
On pace99%within 2 min of schedule
THE SHORT ANSWER
How long does Back Bay to Stony Brook take?
The median completed ride from Back Bay to Stony Brook was 7.2 minutes; the published schedule’s median was 9.2 minutes.
Based on 4,122 direct trips between 2026-08-20 and 2026-09-18, the median observed ride was 7.2 minutes. That was within 2 minutes of the published schedule.
Nine out of ten measured trips finished within approximately 8.2 minutes. These figures describe completed direct trips; they do not include the time spent waiting for the train.
WHEN YOU TRAVEL
Back Bay to Stony Brook times by daypart
Evening rush produced the fastest median for Back Bay to Stony Brook; Off-peak produced the slowest.
Differences can change as the rolling dataset updates.
Midday
7.2 min 915 trips · 98% on paceEvening rush
7.2 min 795 trips · 100% on paceOff-peak
7.2 min 1,568 trips · 99% on paceMEASUREMENT SAMPLE
How Back Bay to Stony Brook was measured
The Back Bay to Stony Brook estimate uses 4,122 completed direct-trip stop-timestamp pairs matched to the schedule active for each observed train.
We publish the median because one dramatic delay should not define an everyday journey, and the 90th percentile because riders still need to understand the bad end of normal.
We do not infer why a trip ran slowly. Construction, incidents, crowding and weather require separate evidence.
Read the complete method →MORE FROM Back Bay
Trips related to Back Bay to Stony Brook
The Back Bay to Stony Brook record is accompanied by 6 other measured direct rides beginning at Back Bay, each with a published median duration.