Morning rush
48 min 547 trips · 78% on paceOBSERVED MBTA TRAVEL TIME · 30 SERVICE DAYS
Union SquaretoChestnut Hill
Green Line
A direct train took 49 minutes on a typical trip. On a slower-than-usual trip, allow up to 56 minutes.
Typical49 min50th percentile
Slower trip56 min90th percentile
Scheduled49 minmedian timetable
On pace69%within 2 min of schedule
THE SHORT ANSWER
How long does Union Square to Chestnut Hill take?
Based on 3,052 direct trips between 2026-08-17 and 2026-09-15, the median observed ride was 49 minutes. That was within 0.5 minutes of the published schedule.
Nine out of ten measured trips finished within approximately 56 minutes. These figures describe completed direct trips; they do not include the time spent waiting for the train.
WHEN YOU TRAVEL
Time-of-day breakdown
Off-peak produced the fastest typical result in this window; Evening rush was slowest. Differences can change as the rolling dataset updates.
Midday
49 min 819 trips · 65% on paceEvening rush
51 min 642 trips · 66% on paceOff-peak
47 min 1,044 trips · 70% on paceHOW TO READ THIS
Measured, not promised.
TransitMeter pairs vehicle stop timestamps with the schedule active for each trip. 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 Union Square