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

Map

Western Ave @ Green St – Sullivan Square

Timing points All stops

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

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

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

Last updated on March 21, 2026

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

All data is available in GTFS feed: 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 01:46 ⁺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 bus Route Map

PDF Version: 91 timetable, stops and map

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 and the total trip duration for this route is approximately 17 minutes.

See why over 2 million users trust and consider busmaps.com as the best public transport website. busmaps gives you Boston Buses suggested routes, real-time bus tracker, line route maps in Boston, and helps to find the closest 91 bus stops near you. No internet available? Download an offline PDF map and bus schedule for the 91 bus to take on your trip.

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