Morning rush
12 min 668 trips · 92% on paceOBSERVED MBTA TRAVEL TIME · 30 SERVICE DAYS
BoylstontoSaint Mary's Street
Green Line
A direct MBTA train from Boylston to Saint Mary's Street took a median 12 minutes across 3,531 observed trips; 90% of measured rides finished within approximately 15 minutes.
Source: MBTA Performance Data · 2026-08-20 to 2026-09-18 · Completed direct trips only
Typical12 min50th percentile
Slower trip15 min90th percentile
Scheduled13 minmedian timetable
On pace93%within 2 min of schedule
THE SHORT ANSWER
How long does Boylston to Saint Mary's Street take?
The median completed ride from Boylston to Saint Mary's Street was 12 minutes; the published schedule’s median was 13 minutes.
Based on 3,531 direct trips between 2026-08-20 and 2026-09-18, the median observed ride was 12 minutes. That was within 1 minutes of the published schedule.
Nine out of ten measured trips finished within approximately 15 minutes. These figures describe completed direct trips; they do not include the time spent waiting for the train.
WHEN YOU TRAVEL
Boylston to Saint Mary's Street times by daypart
Morning rush produced the fastest median for Boylston to Saint Mary's Street; Evening rush produced the slowest.
Differences can change as the rolling dataset updates.
Midday
12 min 890 trips · 93% on paceEvening rush
13 min 715 trips · 93% on paceOff-peak
12 min 1,258 trips · 94% on paceMEASUREMENT SAMPLE
How Boylston to Saint Mary's Street was measured
The Boylston to Saint Mary's Street estimate uses 3,531 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 Boylston
Trips related to Boylston to Saint Mary's Street
The Boylston to Saint Mary's Street record is accompanied by 6 other measured direct rides beginning at Boylston, each with a published median duration.