Morning rush
21 min 671 trips · 90% on paceOBSERVED MBTA TRAVEL TIME · 30 SERVICE DAYS
Back BaytoOak Grove
Orange Line
A direct MBTA train from Back Bay to Oak Grove took a median 22 minutes across 2,935 observed trips; 90% of measured rides finished within approximately 24 minutes.
Source: MBTA Performance Data · 2026-08-20 to 2026-09-18 · Completed direct trips only
Typical22 min50th percentile
Slower trip24 min90th percentile
Scheduled22 minmedian timetable
On pace89%within 2 min of schedule
THE SHORT ANSWER
How long does Back Bay to Oak Grove take?
The median completed ride from Back Bay to Oak Grove was 22 minutes; the published schedule’s median was 22 minutes.
Based on 2,935 direct trips between 2026-08-20 and 2026-09-18, the median observed ride was 22 minutes. That was within 0.5 minutes of the published schedule.
Nine out of ten measured trips finished within approximately 24 minutes. These figures describe completed direct trips; they do not include the time spent waiting for the train.
WHEN YOU TRAVEL
Back Bay to Oak Grove times by daypart
Morning rush produced the fastest median for Back Bay to Oak Grove; Evening rush produced the slowest.
Differences can change as the rolling dataset updates.
Midday
22 min 673 trips · 85% on paceEvening rush
22 min 662 trips · 91% on paceOff-peak
21 min 929 trips · 91% on paceMEASUREMENT SAMPLE
How Back Bay to Oak Grove was measured
The Back Bay to Oak Grove estimate uses 2,935 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 Back Bay
Trips related to Back Bay to Oak Grove
The Back Bay to Oak Grove record is accompanied by 6 other measured direct rides beginning at Back Bay, each with a published median duration.