Mbta 91 Sullivan Square Station - Central Square, Cambridge Bus

A bus service operated by Mbta

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List of stops

Number of stops: 15

Western Ave @ Green St – Sullivan Square

Timing points All stops

Western Ave @ Green St	05:40	06:30	06:55	07:30	08:05	08:35	09:05	09:50	10:40	11:20	12:20	13:20	13:50	14:40	15:30	16:20	16:50	17:20	17:50	18:20	18:50	19:20	20:05	20:50	21:35	22:20	23:05	23:50	00:35 +1	01:20 +1
River St @ Green St	05:40	06:30	06:55	07:31	08:05	08:35	09:05	09:50	10:40	11:21	12:21	13:21	13:51	14:41	15:31	16:21	16:51	17:21	17:51	18:21	18:51	19:21	20:06	20:51	21:36	22:20	23:05	23:50	00:35 +1	01:20 +1
Prospect St @ Bishop Allen Dr	05:41	06:31	06:56	07:31	08:06	08:36	09:06	09:51	10:41	11:21	12:21	13:22	13:52	14:42	15:32	16:22	16:52	17:22	17:52	18:22	18:52	19:21	20:06	20:51	21:36	22:21	23:06	23:51	00:36 +1	01:21 +1
Prospect St @ Harvard St	05:41	06:31	06:56	07:32	08:06	08:36	09:06	09:51	10:41	11:22	12:22	13:22	13:52	14:42	15:32	16:22	16:52	17:23	17:53	18:22	18:52	19:22	20:07	20:52	21:37	22:21	23:06	23:51	00:36 +1	01:21 +1
Prospect St @ Broadway	05:42	06:32	06:57	07:32	08:07	08:37	09:07	09:52	10:42	11:22	12:22	13:23	13:53	14:43	15:33	16:23	16:53	17:23	17:53	18:23	18:53	19:22	20:07	20:52	21:37	22:22	23:07	23:52	00:37 +1	01:22 +1
Prospect St @ Gardner Rd	05:42	06:32	06:57	07:33	08:07	08:37	09:07	09:52	10:42	11:23	12:23	13:24	13:54	14:44	15:34	16:24	16:54	17:24	17:54	18:24	18:54	19:23	20:08	20:53	21:38	22:22	23:07	23:52	00:37 +1	01:22 +1
Prospect St @ Cambridge St	05:43	06:33	06:58	07:34	08:08	08:38	09:08	09:53	10:43	11:24	12:24	13:25	13:55	14:45	15:35	16:25	16:55	17:26	17:56	18:25	18:55	19:24	20:09	20:54	21:39	22:23	23:08	23:53	00:38 +1	01:23 +1
Prospect St @ Webster Ave	05:44	06:34	07:00	07:36	08:11	08:41	09:11	09:56	10:46	11:27	12:27	13:28	13:58	14:48	15:38	16:28	16:58	17:29	17:59	18:28	18:58	19:26	20:11	20:56	21:41	22:25	23:10	23:55	00:39 +1	01:24 +1
Prospect St @ Union Sq - Green Line	05:45	06:35	07:01	07:37	08:12	08:42	09:12	09:57	10:47	11:28	12:28	13:29	13:59	14:49	15:39	16:29	16:59	17:30	18:00	18:29	18:59	19:27	20:12	20:57	21:42	22:26	23:11	23:56	00:40 +1	01:25 +1
Washington St @ Merriam St	05:46	06:36	07:02	07:38	08:13	08:43	09:13	09:58	10:48	11:29	12:29	13:30	14:00	14:50	15:40	16:30	17:01	17:32	18:01	18:30	19:00	19:28	20:13	20:58	21:43	22:27	23:12	23:57	00:41 +1	01:26 +1
Washington St @ Medford St	05:47	06:37	07:03	07:39	08:14	08:44	09:14	09:59	10:49	11:30	12:30	13:31	14:01	14:51	15:41	16:31	17:02	17:33	18:03	18:32	19:01	19:29	20:14	20:59	21:44	22:28	23:13	23:58	00:42 +1	01:27 +1
Washington St @ New Washington St	05:48	06:38	07:05	07:41	08:16	08:46	09:16	10:01	10:51	11:32	12:32	13:33	14:03	14:53	15:43	16:33	17:05	17:36	18:04	18:33	19:03	19:31	20:16	21:01	21:46	22:30	23:15	23:59	00:43 +1	01:28 +1
Washington St opp Myrtle St	05:49	06:39	07:06	07:42	08:17	08:47	09:17	10:02	10:52	11:33	12:33	13:34	14:04	14:54	15:44	16:34	17:07	17:38	18:06	18:35	19:04	19:32	20:17	21:02	21:47	22:31	23:16	00:00 +1	00:44 +1	01:29 +1
Washington St @ Inner Belt Rd	05:50	06:40	07:07	07:43	08:18	08:48	09:18	10:03	10:53	11:34	12:34	13:35	14:05	14:55	15:45	16:35	17:08	17:39	18:07	18:36	19:05	19:33	20:18	21:03	21:48	22:32	23:17	00:01 +1	00:44 +1	01:29 +1
Cambridge St @ Carter St	05:51	06:41	07:07	07:43	08:18	08:48	09:18	10:03	10:53	11:35	12:35	13:36	14:06	14:56	15:46	16:36	17:10	17:41	18:08	18:37	19:06	19:34	20:19	21:04	21:49	22:32	23:17	00:02 +1	00:45 +1	01:30 +1
Sullivan Square	05:53	06:43	07:10	07:46	08:21	08:51	09:21	10:06	10:56	11:38	12:38	13:39	14:09	14:59	15:49	16:39	17:14	17:45	18:11	18:40	19:09	19:37	20:22	21:07	21:52	22:35	23:20	00:04 +1	00:47 +1	01:32 +1

All trips in this timetable are wheelchair accessible.

The schedule is provided in the local timezone. Times with "(+1)" indicate departures on the next day.

Sullivan Square – Western Ave @ Green St

Timing points All stops

Sullivan Square	05:20	06:10	06:35	07:05	07:40	08:04	08:37	09:25	10:15	10:55	11:50	12:50	13:25	14:15	15:05	15:55	16:25	16:50	17:20	17:50	18:20	18:55	19:40	20:25	21:10	21:55	22:40	23:25	00:10 +1	00:55 +1
Cambridge St @ Brighton St	05:21	06:11	06:36	07:06	07:41	08:05	08:38	09:26	10:16	10:56	11:51	12:51	13:26	14:16	15:06	15:56	16:26	16:51	17:21	17:51	18:21	18:56	19:41	20:26	21:11	21:56	22:41	23:26	00:11 +1	00:56 +1
Washington St @ Mt Vernon St	05:22	06:12	06:37	07:07	07:42	08:07	08:40	09:27	10:17	10:57	11:52	12:52	13:27	14:17	15:07	15:57	16:27	16:52	17:22	17:52	18:22	18:57	19:42	20:27	21:12	21:57	22:42	23:26	00:11 +1	00:56 +1
Washington St @ Myrtle St - Cobble Hill Apt	05:22	06:12	06:37	07:08	07:43	08:07	08:40	09:28	10:18	10:58	11:53	12:53	13:28	14:18	15:08	15:58	16:28	16:53	17:23	17:53	18:23	18:58	19:43	20:27	21:12	21:57	22:42	23:27	00:12 +1	00:57 +1
Washington St @ Tufts St	05:23	06:13	06:38	07:09	07:44	08:09	08:42	09:29	10:19	10:59	11:54	12:54	13:29	14:19	15:09	15:59	16:29	16:54	17:24	17:54	18:24	18:59	19:44	20:28	21:13	21:58	22:43	23:27	00:12 +1	00:57 +1
Washington St @ Mcgrath Hwy	05:24	06:14	06:39	07:10	07:45	08:10	08:43	09:30	10:20	11:00	11:55	12:55	13:30	14:20	15:10	16:00	16:29	16:54	17:25	17:55	18:25	19:00	19:44	20:29	21:14	21:59	22:44	23:28	00:13 +1	00:58 +1
Washington St @ Boston St	05:24	06:14	06:39	07:10	07:45	08:10	08:43	09:30	10:20	11:00	11:55	12:55	13:30	14:20	15:10	16:00	16:30	16:55	17:25	17:55	18:25	19:00	19:45	20:29	21:14	21:59	22:44	23:28	00:13 +1	00:58 +1
Washington St @ Washington Terr	05:24	06:14	06:39	07:11	07:46	08:11	08:44	09:31	10:21	11:01	11:56	12:56	13:31	14:21	15:11	16:01	16:30	16:55	17:26	17:56	18:26	19:01	19:45	20:29	21:14	21:59	22:44	23:28	00:13 +1	00:58 +1
Somerville Ave @ Union Sq	05:25	06:15	06:40	07:12	07:47	08:12	08:45	09:32	10:22	11:02	11:57	12:57	13:32	14:22	15:12	16:02	16:31	16:56	17:27	17:57	18:27	19:02	19:46	20:30	21:15	22:00	22:45	23:29	00:14 +1	00:59 +1
25 Webster Ave @ Newton St	05:26	06:16	06:41	07:13	07:48	08:13	08:46	09:33	10:23	11:03	11:58	12:58	13:33	14:23	15:13	16:04	16:33	16:58	17:28	17:58	18:28	19:04	19:48	20:31	21:16	22:01	22:46	23:30	00:15 +1	01:00 +1
Prospect St @ Oak St	05:27	06:17	06:42	07:14	07:49	08:14	08:47	09:34	10:24	11:04	11:59	12:59	13:34	14:24	15:14	16:05	16:34	16:59	17:29	17:59	18:29	19:05	19:49	20:32	21:17	22:02	22:47	23:31	00:16 +1	01:01 +1
Prospect St @ Cambridge St	05:28	06:18	06:43	07:16	07:51	08:16	08:49	09:36	10:26	11:06	12:01	13:01	13:36	14:26	15:16	16:07	16:36	17:01	17:31	18:01	18:31	19:07	19:51	20:34	21:19	22:04	22:49	23:33	00:18 +1	01:03 +1
Prospect St @ St Mary Rd	05:30	06:20	06:45	07:19	07:54	08:20	08:53	09:39	10:29	11:09	12:04	13:04	13:39	14:29	15:19	16:10	16:39	17:05	17:35	18:05	18:35	19:10	19:54	20:37	21:22	22:07	22:52	23:36	00:21 +1	01:06 +1
Prospect St @ Broadway	05:31	06:21	06:46	07:20	07:55	08:21	08:54	09:40	10:30	11:10	12:05	13:05	13:40	14:30	15:20	16:11	16:40	17:06	17:36	18:06	18:36	19:11	19:55	20:38	21:23	22:08	22:53	23:37	00:22 +1	01:07 +1
Prospect St @ Harvard St	05:32	06:22	06:47	07:21	07:56	08:23	08:56	09:41	10:31	11:11	12:06	13:06	13:41	14:31	15:21	16:12	16:41	17:08	17:38	18:08	18:38	19:12	19:56	20:39	21:24	22:09	22:54	23:38	00:23 +1	01:08 +1
Prospect St @ Bishop Allen Dr	05:34	06:24	06:49	07:23	07:58	08:26	08:59	09:43	10:33	11:13	12:08	13:08	13:43	14:33	15:23	16:14	16:43	17:11	17:41	18:11	18:41	19:14	19:58	20:40	21:25	22:10	22:55	23:40	00:25 +1	01:10 +1
Western Ave @ Green St	05:35	06:25	06:50	07:25	08:00	08:28	09:01	09:45	10:35	11:15	12:10	13:10	13:45	14:35	15:25	16:16	16:45	17:13	17:43	18:13	18:43	19:16	20:00	20:42	21:27	22:12	22:57	23:42	00:27 +1	01:12 +1

All trips in this timetable are wheelchair accessible.

The schedule is provided in the local timezone. Times with "(+1)" indicate departures on the next day.

Route Path (Streets & Roads)

Outbound: Western Ave @ Green St – Sullivan Square

Western Avenue - River Street - Bishop Allen Drive - Prospect Street - Washington Street - McGrath Highway - Washington Street - Cambridge Street

Inbound: Sullivan Square – Western Ave @ Green St

Interstate 93 HOV lane - Cambridge Street - Washington Street - Union Square - Newton Street - Oak Street - Prospect Street - Harvard Street - Bishop Allen Drive - Western Avenue

Schedules and stops for this route are published in GTFS: boston-mbta

Bus 91 FAQ

What time does the 91 bus start operating?

Services on the 91 - Sullivan Square Station - Central Square, Cambridge bus start at 05:40 on Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday.
What time does the 91 bus stop working?

Services on the 91 - Sullivan Square Station - Central Square, Cambridge bus stop at 01:32 ⁺¹ on Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday.
Is there a 91 bus stop near me?

Click here to view the nearest 91 - Sullivan Square Station - Central Square, Cambridge bus stop.

91 (Boston Buses)

The first stop of the 91 bus route is Western Ave @ Green St and the last stop is Sullivan Square. 91 (Sullivan Square Station - Central Square, Cambridge) is operational during everyday.

Additional information: 91 has 16 stops. The total trip duration for this route is approximately 25 minutes.

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91 bus near me

Last updated on August 10, 2026

Mbta 91 Sullivan Square Station - Central Square, Cambridge Bus

Western Ave @ Green St – Sullivan Square

Sullivan Square – Western Ave @ Green St

Route Path (Streets & Roads)

Bus 91 FAQ

What time does the 91 bus start operating?

What time does the 91 bus stop working?

Is there a 91 bus stop near me?

91 (Boston Buses)