Morning rush
22 min 440 trips · 93% on paceOBSERVED MBTA TRAVEL TIME · 30 SERVICE DAYS
ArlingtontoUnion Square
Green Line
A direct MBTA train from Arlington to Union Square took a median 23 minutes across 2,474 observed trips; 90% of measured rides finished within approximately 27 minutes.
Source: MBTA Performance Data · 2026-08-20 to 2026-09-18 · Completed direct trips only
Typical23 min50th percentile
Slower trip27 min90th percentile
Scheduled25 minmedian timetable
On pace86%within 2 min of schedule
THE SHORT ANSWER
How long does Arlington to Union Square take?
The median completed ride from Arlington to Union Square was 23 minutes; the published schedule’s median was 25 minutes.
Based on 2,474 direct trips between 2026-08-20 and 2026-09-18, the median observed ride was 23 minutes. That was within 2.5 minutes of the published schedule.
Nine out of ten measured trips finished within approximately 27 minutes. These figures describe completed direct trips; they do not include the time spent waiting for the train.
WHEN YOU TRAVEL
Arlington to Union Square times by daypart
Morning rush produced the fastest median for Arlington to Union Square; Evening rush produced the slowest.
Differences can change as the rolling dataset updates.
Midday
23 min 600 trips · 88% on paceEvening rush
24 min 520 trips · 80% on paceOff-peak
22 min 914 trips · 86% on paceMEASUREMENT SAMPLE
How Arlington to Union Square was measured
The Arlington to Union Square estimate uses 2,474 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 Arlington
Trips related to Arlington to Union Square
The Arlington to Union Square record is accompanied by 6 other measured direct rides beginning at Arlington, each with a published median duration.