Bus Ab3 - 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

Saturdays

Downtown Boulder Station Gate 2 – Denver Airport Station Gate 6

Timing points All stops

Downtown Boulder Station Gate 2	06:59	07:59	16:29	17:29	18:26
Canyon Blvd & Mcguckin Wy	07:03	08:03	16:33	17:33	18:30
28th St & Arapahoe Ave	07:07	08:07	16:37	17:37	18:34
28th St & Taft Dr	07:07	08:07	16:37	17:37	18:34
28th St & Colorado Ave	07:08	08:08	16:38	17:38	18:35
US 36 & Table Mesa Station Gate B	07:16 07:21p	08:16 08:21p	16:46 16:51p	17:46 17:51p	18:43 18:48p
US 36 & Mccaslin Station Gate B	07:29	08:29	16:59	17:59	18:56
Via Varra Rd & Midway Blvd	07:34	08:34	17:04	18:04	19:01
US 36 & Flatiron Station Gate A	07:36 07:37	08:36 08:37	17:06 17:07	18:06 18:07	19:03 19:04
13600 Block Via Varra	07:38	08:38	17:08	18:08	19:05
Denver Airport Station Gate 6	08:17	09:17	17:47	18:47	19:44

Times marked p – "pick up only" – the vehicle will only stop to pick up passengers.

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

Timing points All stops

Denver Airport Station Gate 8	08:50	09:50	18:20	19:20
13500 Block Via Varra	09:21	10:21	18:51	19:51
US 36 & Flatiron Station Gate A	09:22 09:23	10:22 10:23	18:52 18:53	19:52 19:53
Via Varra Rd & Midway Blvd	09:23	10:23	18:54	19:54
US 36 & Mccaslin Station Gate E	09:30	10:30	19:01	20:01
US 36 & Table Mesa Station Gate B	09:44	10:44	19:16	20:16
28th St & College Ave	09:49	10:49	19:21	20:21
28th St & Sundown La	09:50	10:50	19:22	20:22
28th St & Arapahoe Ave	09:51	10:51	19:23	20:23
Canyon Blvd & 28th St	09:57	10:57	19:28	20:28
Downtown Boulder Station (Ar)	10:02	11:02	19:32	20:32

Times marked p – "pick up only" – the vehicle will only stop to pick up passengers.

Last updated on March 24, 2026

Route Path (Streets & Roads)

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

14th Street - Canyon Boulevard - 28th Street - Table Mesa Drive - Center Drive - Via Varra - Denver–Boulder Turnpike - Via Varra - Terminal East Departures

Inbound: 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 - 28th Street Frontage Road - 28th Street - Canyon Boulevard - Walnut Street

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

Bus Ab3 FAQ

What time does the Ab3 bus start operating?

Services on the Ab3 - Boulder / Denver Airport bus start at 06:59 on Saturday.
What time does the Ab3 bus stop working?

Services on the Ab3 - Boulder / Denver Airport bus stop at 19:44 on Saturday.
Is there a Ab3 bus stop near me?

Click here to view the nearest Ab3 - Boulder / Denver Airport bus stop.

Ab3 bus Route Map

PDF Version: Ab3 timetable, stops and map

Ab3 (Boulder Buses)

The first stop of the Ab3 bus route is Downtown Boulder Station Gate 2 and the last stop is Denver Airport Station Gate 6. Ab3 (Boulder / Denver Airport) is operational during everyday.

Additional information: Ab3 has 11 stops and the total trip duration for this route is approximately 78 minutes.

See why over 2 million users trust and consider busmaps.com as the best public transport website. busmaps gives you Boulder Buses suggested routes, real-time bus tracker, line route maps in Boulder, and helps to find the closest Ab3 bus stops near you. No internet available? Download an offline PDF map and bus schedule for the Ab3 bus to take on your trip.

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Ab2 - Boulder / Denver Airport

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