Morning rush
9.8 min 646 trips · 94% on paceOBSERVED MBTA TRAVEL TIME · 30 SERVICE DAYS
ArlingtontoSaint Mary's Street
Green Line
A direct MBTA train from Arlington to Saint Mary's Street took a median 9.8 minutes across 3,533 observed trips; 90% of measured rides finished within approximately 12 minutes.
Source: MBTA Performance Data · 2026-08-20 to 2026-09-18 · Completed direct trips only
Typical9.8 min50th percentile
Slower trip12 min90th percentile
Scheduled11 minmedian timetable
On pace94%within 2 min of schedule
THE SHORT ANSWER
How long does Arlington to Saint Mary's Street take?
The median completed ride from Arlington to Saint Mary's Street was 9.8 minutes; the published schedule’s median was 11 minutes.
Based on 3,533 direct trips between 2026-08-20 and 2026-09-18, the median observed ride was 9.8 minutes. That was within 1.5 minutes of the published schedule.
Nine out of ten measured trips finished within approximately 12 minutes. These figures describe completed direct trips; they do not include the time spent waiting for the train.
WHEN YOU TRAVEL
Arlington to Saint Mary's Street times by daypart
Midday produced the fastest median for Arlington to Saint Mary's Street; Evening rush produced the slowest.
Differences can change as the rolling dataset updates.
Midday
9.8 min 888 trips · 94% on paceEvening rush
10 min 714 trips · 92% on paceOff-peak
9.8 min 1,285 trips · 95% on paceMEASUREMENT SAMPLE
How Arlington to Saint Mary's Street was measured
The Arlington to Saint Mary's Street estimate uses 3,533 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 Arlington
Trips related to Arlington to Saint Mary's Street
The Arlington to Saint Mary's Street record is accompanied by 6 other measured direct rides beginning at Arlington, each with a published median duration.