Morning rush
10 min 700 trips · 95% on paceOBSERVED MBTA TRAVEL TIME · 30 SERVICE DAYS
Saint Mary's StreettoArlington
Green Line
A direct MBTA train from Saint Mary's Street to Arlington took a median 10 minutes across 3,548 observed trips; 90% of measured rides finished within approximately 13 minutes.
Source: MBTA Performance Data · 2026-08-20 to 2026-09-18 · Completed direct trips only
Typical10 min50th percentile
Slower trip13 min90th percentile
Scheduled12 minmedian timetable
On pace92%within 2 min of schedule
THE SHORT ANSWER
How long does Saint Mary's Street to Arlington take?
The median completed ride from Saint Mary's Street to Arlington was 10 minutes; the published schedule’s median was 12 minutes.
Based on 3,548 direct trips between 2026-08-20 and 2026-09-18, the median observed ride was 10 minutes. That was within 2 minutes of the published schedule.
Nine out of ten measured trips finished within approximately 13 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 Arlington times by daypart
Morning rush produced the fastest median for Saint Mary's Street to Arlington; Midday produced the slowest.
Differences can change as the rolling dataset updates.
Midday
11 min 953 trips · 91% on paceEvening rush
11 min 739 trips · 91% on paceOff-peak
10 min 1,156 trips · 92% on paceMEASUREMENT SAMPLE
How Saint Mary's Street to Arlington was measured
The Saint Mary's Street to Arlington estimate uses 3,548 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 Arlington
The Saint Mary's Street to Arlington record is accompanied by 6 other measured direct rides beginning at Saint Mary's Street, each with a published median duration.