Morning rush
9.2 min 702 trips · 98% on paceOBSERVED MBTA TRAVEL TIME · 30 SERVICE DAYS
AshmonttoMattapan
Mattapan Line
A direct MBTA train from Ashmont to Mattapan took a median 9.2 minutes across 3,288 observed trips; 90% of measured rides finished within approximately 11 minutes.
Source: MBTA Performance Data · 2026-08-20 to 2026-09-18 · Completed direct trips only
Typical9.2 min50th percentile
Slower trip11 min90th percentile
Scheduled10 minmedian timetable
On pace98%within 2 min of schedule
THE SHORT ANSWER
How long does Ashmont to Mattapan take?
The median completed ride from Ashmont to Mattapan was 9.2 minutes; the published schedule’s median was 10 minutes.
Based on 3,288 direct trips between 2026-08-20 and 2026-09-18, the median observed ride was 9.2 minutes. That was within 1 minutes of the published schedule.
Nine out of ten measured trips finished within approximately 11 minutes. These figures describe completed direct trips; they do not include the time spent waiting for the train.
WHEN YOU TRAVEL
Ashmont to Mattapan times by daypart
Midday produced the fastest median for Ashmont to Mattapan; Evening rush produced the slowest.
Differences can change as the rolling dataset updates.
Midday
9.2 min 845 trips · 99% on paceEvening rush
9.8 min 808 trips · 98% on paceOff-peak
9.2 min 933 trips · 99% on paceMEASUREMENT SAMPLE
How Ashmont to Mattapan was measured
The Ashmont to Mattapan estimate uses 3,288 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 Ashmont
Trips related to Ashmont to Mattapan
The Ashmont to Mattapan record is accompanied by 6 other measured direct rides beginning at Ashmont, each with a published median duration.