Morning rush
11 min 673 trips · 95% on paceOBSERVED MBTA TRAVEL TIME · 30 SERVICE DAYS
Back BaytoSullivan Square
Orange Line
A direct MBTA train from Back Bay to Sullivan Square took a median 12 minutes across 2,950 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
Typical12 min50th percentile
Slower trip13 min90th percentile
Scheduled12 minmedian timetable
On pace96%within 2 min of schedule
THE SHORT ANSWER
How long does Back Bay to Sullivan Square take?
The median completed ride from Back Bay to Sullivan Square was 12 minutes; the published schedule’s median was 12 minutes.
Based on 2,950 direct trips between 2026-08-20 and 2026-09-18, the median observed ride was 12 minutes. That was within 0.5 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
Back Bay to Sullivan Square times by daypart
Morning rush produced the fastest median for Back Bay to Sullivan Square; Evening rush produced the slowest.
Differences can change as the rolling dataset updates.
Midday
12 min 684 trips · 95% on paceEvening rush
12 min 664 trips · 96% on paceOff-peak
11 min 929 trips · 96% on paceMEASUREMENT SAMPLE
How Back Bay to Sullivan Square was measured
The Back Bay to Sullivan Square estimate uses 2,950 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 Sullivan Square
The Back Bay to Sullivan Square record is accompanied by 6 other measured direct rides beginning at Back Bay, each with a published median duration.