91

MBTA Route 91 Sullivan Square Station - Central Square, Cambridge

Bus Boston, MA30 stopsto Sullivanto Central Square

View live on the mapOfficial MBTA schedule All MBTA routes

LIVE SERVICE STATUS

Checking the MBTA alerts feed…

Schedule summary

Computed from the MBTA GTFS feed (version Fall 2026, 2026-10-21T20:52:18+00:00, version D). Each row is the next day of that kind with service.

DayDirectionFirstLastTripsTypical gap
WeekdayTue, Oct 27to Sullivan5:40 AM1:20 AM30~45 min
to Central Square5:20 AM12:55 AM30~45 min
SaturdaySat, Oct 31to Sullivan5:40 AM1:35 AM27~45 min
to Central Square5:21 AM1:15 AM27~45 min
SundaySun, Nov 1to Sullivan6:10 AM12:04 AM25~45 min
to Central Square5:45 AM11:45 PM25~45 min

Stops & times — today, Tue, Oct 27

To Sullivan · 14 stops

Departures from River St @ Green St today:

5:40 AM6:30 AM6:55 AM7:30 AM8:05 AM8:35 AM9:05 AM9:50 AM10:40 AM11:20 AM12:20 PM1:20 PM1:50 PM2:40 PM3:30 PM4:20 PM4:50 PM5:20 PM5:50 PM6:20 PM6:50 PM7:20 PM8:05 PM8:50 PM9:35 PM10:20 PM11:05 PM11:50 PM12:35 AM1:20 AM

  1. 1

    River St @ Green St

    First 5:40 AM · Last 1:20 AM (+1 day) · 30 scheduled departures

  2. 2

    Prospect St @ Bishop Allen Dr

    First 5:41 AM · Last 1:21 AM (+1 day) · 30 scheduled departures

  3. 3

    Prospect St @ Harvard St

    First 5:41 AM · Last 1:21 AM (+1 day) · 30 scheduled departures

  4. 4

    Prospect St @ Broadway

    First 5:42 AM · Last 1:22 AM (+1 day) · 30 scheduled departures

  5. 5

    Prospect St @ Gardner Rd

    First 5:42 AM · Last 1:22 AM (+1 day) · 30 scheduled departures

  6. 6

    Prospect St @ Cambridge St

    First 5:43 AM · Last 1:23 AM (+1 day) · 30 scheduled departures

  7. 7

    Prospect St @ Webster Ave

    First 5:44 AM · Last 1:24 AM (+1 day) · 30 scheduled departures

  8. 8

    Prospect St @ Union Sq - Green Line

    First 5:45 AM · Last 1:25 AM (+1 day) · 30 scheduled departures

  9. 9

    Washington St @ Rossmore St

    First 5:46 AM · Last 1:26 AM (+1 day) · 30 scheduled departures

  10. 10

    Washington St @ New Washington St

    First 5:48 AM · Last 1:28 AM (+1 day) · 30 scheduled departures

  11. 11

    Washington St opp Myrtle St

    First 5:49 AM · Last 1:29 AM (+1 day) · 30 scheduled departures

  12. 12

    Washington St @ Inner Belt Rd

    First 5:50 AM · Last 1:29 AM (+1 day) · 30 scheduled departures

  13. 13

    Cambridge St @ Carter St

    First 5:51 AM · Last 1:30 AM (+1 day) · 30 scheduled departures

  14. 14

    Sullivan Square

    First 5:53 AM · Last 1:32 AM (+1 day) · 30 scheduled departures

To Central Square · 17 stops

Departures from Sullivan Square today:

5:20 AM6:05 AM6:35 AM7:05 AM7:35 AM8:05 AM8:37 AM9:25 AM10:15 AM10:55 AM11:50 AM12:50 PM1:25 PM2:15 PM3:05 PM3:55 PM4:25 PM4:50 PM5:20 PM5:50 PM6:20 PM6:55 PM7:40 PM8:25 PM9:10 PM9:55 PM10:40 PM11:25 PM12:10 AM12:55 AM

  1. 1

    Sullivan Square

    First 5:20 AM · Last 12:55 AM (+1 day) · 30 scheduled departures

  2. 2

    Cambridge St @ Brighton St

    First 5:21 AM · Last 12:56 AM (+1 day) · 30 scheduled departures

  3. 3

    Washington St @ Mt Vernon St

    First 5:22 AM · Last 12:56 AM (+1 day) · 30 scheduled departures

  4. 4

    Washington St @ Myrtle St - Cobble Hill Apt

    First 5:22 AM · Last 12:57 AM (+1 day) · 30 scheduled departures

  5. 5

    Washington St @ Tufts St

    First 5:23 AM · Last 12:57 AM (+1 day) · 30 scheduled departures

  6. 6

    Washington St @ McGrath Hwy

    First 5:24 AM · Last 12:58 AM (+1 day) · 30 scheduled departures

  7. 7

    Washington St @ Boston St

    First 5:24 AM · Last 12:58 AM (+1 day) · 30 scheduled departures

  8. 8

    Somerville Ave @ Union Sq

    First 5:25 AM · Last 12:59 AM (+1 day) · 30 scheduled departures

  9. 9

    25 Webster Ave @ Newton St

    First 5:26 AM · Last 1:00 AM (+1 day) · 30 scheduled departures

  10. 10

    Prospect St @ Oak St

    First 5:27 AM · Last 1:01 AM (+1 day) · 30 scheduled departures

  11. 11

    Prospect St @ Cambridge St

    First 5:28 AM · Last 1:03 AM (+1 day) · 30 scheduled departures

  12. 12

    Prospect St @ St Mary Rd

    First 5:30 AM · Last 1:06 AM (+1 day) · 30 scheduled departures

  13. 13

    Prospect St @ Broadway

    First 5:31 AM · Last 1:07 AM (+1 day) · 30 scheduled departures

  14. 14

    Prospect St @ Harvard St

    First 5:32 AM · Last 1:08 AM (+1 day) · 30 scheduled departures

  15. 15

    Prospect St @ Bishop Allen Dr

    First 5:33 AM · Last 1:09 AM (+1 day) · 30 scheduled departures

  16. 16

    Western Ave @ Green St

    First 5:34 AM · Last 1:11 AM (+1 day) · 30 scheduled departures

  17. 17

    River St @ Green St

    First 5:35 AM · Last 1:12 AM (+1 day) · 30 scheduled departures

MBTA Route 91 Sullivan Square Station - Central Square, Cambridge — questions

What time does MBTA Route 91 Sullivan Square Station - Central Square, Cambridge run on weekdays?

On a typical weekday (Tue, Oct 27), the first MBTA Route 91 Sullivan Square Station - Central Square, Cambridge departure is 5:40 AM and the last is 1:20 AM, running roughly every 45 minutes. Times are the published schedule from the MBTA GTFS feed (version Fall 2026, 2026-10-21T20:52:18+00:00, version D).

Where does MBTA Route 91 Sullivan Square Station - Central Square, Cambridge go?

MBTA Route 91 Sullivan Square Station - Central Square, Cambridge serves 30 stops: River St @ Green St → Sullivan Square (to Sullivan); Sullivan Square → River St @ Green St (to Central Square). The full ordered stop list with first and last departure times is on this page.

Does MBTA Route 91 Sullivan Square Station - Central Square, Cambridge run on weekends?

Yes — Saturday service runs 54 trips; Sunday service runs 50 trips. See the schedule summary for first and last times.

Is MBTA Route 91 Sullivan Square Station - Central Square, Cambridge delayed or on detour right now?

The live service status section at the top of this page reads MBTA's realtime alerts feed — detours, suspensions and delays for this route appear there as the agency posts them. Everything else on this page is the published timetable.

Can I watch MBTA Route 91 Sullivan Square Station - Central Square, Cambridge live on a map?

Yes — the WorldEye globe carries MBTA's live vehicle positions on its transit layer. Open the live map from this page, and tap any vehicle or stop for its next arrivals. It's free, no signup.

More Bus routes

Times on this page are the published schedule from MBTA's GTFS feed (version Fall 2026, 2026-10-21T20:52:18+00:00, version D); live status comes from the agency's realtime alerts feed and can differ. Data: MBTA. Long name as published: “Sullivan Square Station - Central Square, Cambridge”. WorldEye is a free viewer — for fares, passes and official notices, see MBTA's own site.

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