Morning rush
13 min 694 trips · 93% on paceOBSERVED MBTA TRAVEL TIME · 30 SERVICE DAYS
Saint Mary's StreettoBoylston
Green Line
A direct MBTA train from Saint Mary's Street to Boylston took a median 13 minutes across 3,528 observed trips; 90% of measured rides finished within approximately 17 minutes.
Source: MBTA Performance Data · 2026-08-20 to 2026-09-18 · Completed direct trips only
Typical13 min50th percentile
Slower trip17 min90th percentile
Scheduled15 minmedian timetable
On pace89%within 2 min of schedule
THE SHORT ANSWER
How long does Saint Mary's Street to Boylston take?
The median completed ride from Saint Mary's Street to Boylston was 13 minutes; the published schedule’s median was 15 minutes.
Based on 3,528 direct trips between 2026-08-20 and 2026-09-18, the median observed ride was 13 minutes. That was within 2 minutes of the published schedule.
Nine out of ten measured trips finished within approximately 17 minutes. These figures describe completed direct trips; they do not include the time spent waiting for the train.
WHEN YOU TRAVEL
Saint Mary's Street to Boylston times by daypart
Morning rush produced the fastest median for Saint Mary's Street to Boylston; Evening rush produced the slowest.
Differences can change as the rolling dataset updates.
Midday
13 min 949 trips · 90% on paceEvening rush
14 min 735 trips · 87% on paceOff-peak
13 min 1,150 trips · 87% on paceMEASUREMENT SAMPLE
How Saint Mary's Street to Boylston was measured
The Saint Mary's Street to Boylston estimate uses 3,528 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 Saint Mary's Street
Trips related to Saint Mary's Street to Boylston
The Saint Mary's Street to Boylston record is accompanied by 6 other measured direct rides beginning at Saint Mary's Street, each with a published median duration.