Bus Ab1 - Boulder / Denver Airport: Full Schedule in Boulder

A bus service operated by Regional Transportation District

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List of stops

Number of stops: 15

Map

Denver Airport Station Gate 8 – Downtown Boulder Station (Ar)

Timing points All stops

Denver Airport Station Gate 8	05:20	06:20	07:20	08:20	09:20	10:20	11:20	12:20	13:20	14:20	15:20	16:20	16:38	17:20	18:50	19:50	20:20	21:20	22:20	23:20
13500 Block Via Varra	05:51	06:51	07:51	08:51	09:51	10:51	11:51	12:51	13:51	14:51	15:51	16:51	17:09	17:51	19:21	20:21	20:51	21:51	22:51	23:51
US 36 & Flatiron Station Gate A	05:52 05:53	06:52 06:53	07:52 07:53	08:52 08:53	09:52 09:53	10:52 10:53	11:52 11:53	12:52 12:53	13:52 13:53	14:52 14:53	15:52 15:53	16:52 16:53	17:10 17:11	17:52 17:53	19:22 19:23	20:22 20:23	20:52 20:53	21:52 21:53	22:52 22:53	23:52 23:53
Via Varra Rd & Midway Blvd	05:53	06:53	07:53	08:53	09:53	10:53	11:53	12:53	13:53	14:54	15:54	16:54	17:12	17:54	19:23	20:23	20:53	21:53	22:53	23:53
US 36 & Mccaslin Station Gate E	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:01	16:01	17:01	17:19	18:01	19:30	20:30	21:00	22:00	23:00	00:00 +1
US 36 & Table Mesa Station Gate B	06:13	07:13	08:13	09:14	10:14	11:14	12:14	13:14	14:14	15:16	16:16	17:16	17:34	18:16	19:45	20:45	21:15	22:15	23:15	00:15 +1
Table Mesa Dr & Tantra Dr	06:13	07:13	08:13	09:15	10:15	11:15	12:15	13:15	14:15	15:17	16:17	17:17	17:35	18:17	19:46	20:46	21:16	22:16	23:16	00:16 +1
S Broadway & Table Mesa Dr	06:14	07:14	08:14	09:16	10:16	11:16	12:16	13:16	14:16	15:18	16:18	17:18	17:36	18:18	19:48	20:48	21:17	22:17	23:17	00:17 +1
Broadway & Dartmouth Pnr	06:15	07:15	08:15	09:18	10:18	11:18	12:18	13:18	14:18	15:20	16:20	17:20	17:38	18:20	19:49	20:49	21:19	22:19	23:19	00:19 +1
27th Way & Broadway Pnr	06:17	07:17	08:17	09:20	10:20	11:20	12:20	13:20	14:20	15:22	16:22	17:22	17:40	18:22	19:52	20:52	21:21	22:21	23:21	00:21 +1
Broadway & Baseline Rd	06:17	07:17	08:17	09:20	10:20	11:20	12:20	13:20	14:20	15:23	16:23	17:23	17:41	18:23	19:52	20:52	21:21	22:21	23:21	00:21 +1
Broadway & Euclid Ave	06:20	07:20	08:20	09:24	10:24	11:24	12:23	13:23	14:23	15:27	16:27	17:27	17:45	18:27	19:56	20:56	21:25	22:25	23:25	00:25 +1
Broadway & Pleasant St	06:21	07:21	08:21	09:25	10:25	11:25	12:24	13:24	14:24	15:29	16:29	17:29	17:47	18:29	19:57	20:57	21:26	22:26	23:25	00:25 +1
Broadway & University Ave	06:21	07:21	08:21	09:26	10:26	11:26	12:25	13:25	14:25	15:30	16:30	17:30	17:48	18:30	19:57	20:57	21:26	22:26	23:26	00:26 +1
Downtown Boulder Station (Ar)	06:24	07:24	08:24	09:31	10:31	11:31	12:30	13:30	14:30	15:35	16:35	17:35	17:53	18:35	20:01	21:01	21:29	22:29	23:29	00:29 +1

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

Downtown Boulder Station Gate 2 – Denver Airport Station Gate 6

Timing points All stops

Downtown Boulder Station Gate 2	03:04	04:34	05:34	06:23	07:23	08:23	09:21	10:21	11:21	12:21	13:21	14:21	15:21	16:53	17:53	19:27	20:27	21:27
Broadway & University Ave	03:09	04:39	05:39	06:30	07:30	08:30	09:27	10:27	11:27	12:27	13:27	14:27	15:27	16:59	17:59	19:33	20:33	21:33
Broadway & College Ave	03:10	04:40	05:40	06:32	07:32	08:32	09:29	10:29	11:29	12:29	13:29	14:29	15:29	17:01	18:01	19:34	20:34	21:34
Broadway & Euclid Ave	03:13	04:43	05:43	06:35	07:35	08:35	09:32	10:32	11:32	12:32	13:32	14:32	15:32	17:04	18:04	19:37	20:37	21:37
Broadway & Baseline Rd	03:15	04:45	05:45	06:37	07:37	08:37	09:34	10:34	11:34	12:34	13:34	14:34	15:35	17:07	18:07	19:39	20:39	21:39
Broadway & 27th Way	03:16	04:46	05:46	06:38	07:38	08:38	09:36	10:36	11:36	12:36	13:36	14:36	15:37	17:09	18:09	19:41	20:41	21:41
S Broadway & Dartmouth Ave	03:17	04:47	05:47	06:40	07:40	08:40	09:38	10:38	11:38	12:38	13:38	14:38	15:39	17:11	18:11	19:43	20:43	21:43
Table Mesa Dr & 39th St	03:19	04:49	05:49	06:42	07:42	08:42	09:40	10:40	11:40	12:40	13:40	14:40	15:40	17:12	18:12	19:44	20:44	21:44
Table Mesa Dr & Tantra Dr	03:20	04:50	05:50	06:44	07:44	08:44	09:42	10:42	11:42	12:42	13:42	14:42	15:42	17:14	18:14	19:46	20:46	21:46
US 36 & Table Mesa Station Gate B	03:22 03:27	04:52 04:57	05:52 05:57	06:46 06:51	07:46 07:51	08:46 08:51	09:44 09:49	10:44 10:49	11:44 11:49	12:44 12:49	13:44 13:49	14:44 14:49	15:44 15:49	17:16 17:21	18:16 18:21	19:48 19:53	20:48 20:53	21:48 21:53
US 36 & Mccaslin Station Gate B	03:33	05:03	06:03	06:59	07:59	08:59	09:57	10:57	11:57	12:57	13:57	14:57	15:57	17:29	18:29	20:00	21:00	22:00
Via Varra Rd & Midway Blvd	03:38	05:08	06:08	07:04	08:04	09:04	10:02	11:02	12:02	13:02	14:02	15:02	16:02	17:34	18:34	20:05	21:05	22:05
US 36 & Flatiron Station Gate A	03:39 03:40	05:09 05:10	06:09 06:10	07:06 07:07	08:06 08:07	09:06 09:07	10:04 10:05	11:04 11:05	12:04 12:05	13:04 13:05	14:04 14:05	15:04 15:05	16:04 16:05	17:36 17:37	18:36 18:37	20:06 20:07	21:06 21:07	22:06 22:07
13600 Block Via Varra	03:40	05:10	06:10	07:08	08:08	09:08	10:06	11:06	12:06	13:06	14:06	15:06	16:06	17:38	18:38	20:08	21:08	22:08
Denver Airport Station Gate 6	04:17	05:47	06:47	07:47	08:47	09:47	10:45	11:45	12:45	13:45	14:45	15:45	16:45	18:17	19:17	20:47	21:47	22:47

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: Denver Airport Station Gate 8 – Downtown Boulder Station (Ar)

Terminal East Departures - Via Varra - Denver–Boulder Turnpike - Via Varra - Denver–Boulder Turnpike - Table Mesa Drive - South Broadway - Broadway - Walnut Street

Inbound: Downtown Boulder Station Gate 2 – Denver Airport Station Gate 6

14th Street - Broadway - 27th Street - South Broadway - Table Mesa Drive - Center Drive - Via Varra - Denver–Boulder Turnpike - Via Varra - Terminal East Departures

All data is available in GTFS feed: regional-transportation-district

Bus Ab1 FAQ

What time does the Ab1 bus start operating?

Services on the Ab1 - Boulder / Denver Airport bus start at 05:20 on Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday.
What time does the Ab1 bus stop working?

Services on the Ab1 - Boulder / Denver Airport bus stop at 00:29 ⁺¹ on Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday.
Is there a Ab1 bus stop near me?

Click here to view the nearest Ab1 - Boulder / Denver Airport bus stop.

Ab1 bus Route Map

PDF Version: Ab1 timetable, stops and map

Ab1 (Boulder Buses)

The first stop of the Ab1 bus route is Denver Airport Station Gate 8 and the last stop is Downtown Boulder Station (Ar). Ab1 (Boulder / Denver Airport) is operational during everyday.

Additional information: Ab1 has 15 stops and the total trip duration for this route is approximately 75 minutes.

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