Morning rush
12 min 773 trips · 96% on paceOBSERVED MBTA TRAVEL TIME · 30 SERVICE DAYS
Sullivan SquaretoBack Bay
Orange Line
A direct MBTA train from Sullivan Square to Back Bay took a median 12 minutes across 3,502 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 pace94%within 2 min of schedule
THE SHORT ANSWER
How long does Sullivan Square to Back Bay take?
The median completed ride from Sullivan Square to Back Bay was 12 minutes; the published schedule’s median was 12 minutes.
Based on 3,502 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
Sullivan Square to Back Bay times by daypart
Evening rush produced the fastest median for Sullivan Square to Back Bay; Off-peak produced the slowest.
Differences can change as the rolling dataset updates.
Midday
12 min 643 trips · 96% on paceEvening rush
12 min 746 trips · 93% on paceOff-peak
12 min 1,340 trips · 94% on paceMEASUREMENT SAMPLE
How Sullivan Square to Back Bay was measured
The Sullivan Square to Back Bay estimate uses 3,502 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 Sullivan Square
Trips related to Sullivan Square to Back Bay
The Sullivan Square to Back Bay record is accompanied by 6 other measured direct rides beginning at Sullivan Square, each with a published median duration.