Morning rush
20 min 700 trips · 90% on paceOBSERVED MBTA TRAVEL TIME · 30 SERVICE DAYS
Oak GrovetoBack Bay
Orange Line
A direct MBTA train from Oak Grove to Back Bay took a median 20 minutes across 3,143 observed trips; 90% of measured rides finished within approximately 22 minutes.
Source: MBTA Performance Data · 2026-08-20 to 2026-09-18 · Completed direct trips only
Typical20 min50th percentile
Slower trip22 min90th percentile
Scheduled20 minmedian timetable
On pace87%within 2 min of schedule
THE SHORT ANSWER
How long does Oak Grove to Back Bay take?
The median completed ride from Oak Grove to Back Bay was 20 minutes; the published schedule’s median was 20 minutes.
Based on 3,143 direct trips between 2026-08-20 and 2026-09-18, the median observed ride was 20 minutes. That was within 0 minutes of the published schedule.
Nine out of ten measured trips finished within approximately 22 minutes. These figures describe completed direct trips; they do not include the time spent waiting for the train.
WHEN YOU TRAVEL
Oak Grove to Back Bay times by daypart
Evening rush produced the fastest median for Oak Grove to Back Bay; Off-peak produced the slowest.
Differences can change as the rolling dataset updates.
Midday
20 min 590 trips · 89% on paceEvening rush
20 min 637 trips · 86% on paceOff-peak
20 min 1,216 trips · 85% on paceMEASUREMENT SAMPLE
How Oak Grove to Back Bay was measured
The Oak Grove to Back Bay estimate uses 3,143 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 Oak Grove
Trips related to Oak Grove to Back Bay
The Oak Grove to Back Bay record is accompanied by 6 other measured direct rides beginning at Oak Grove, each with a published median duration.