AB3
Boulder / Denver Airport
Bus
Timetable valid Sep 27, 2026 to Jan 2, 2027, from RTD's published schedule.
Departures from US 36 & Flatiron Station Gate C
No weekdays service in this direction.
Live arrivals on the mapOther routes at this stop
When it runs · Weekdays
No weekdays service in this direction.
The Sunday schedule also runs on Nov 26, Nov 27, Dec 25, Jan 1.
Route map
Stops (11) · To Dtwn Boulder via 28th St
- Denver Airport Station Gate 8(Timepoint)
- 13500 Block Via Varra
- US 36 & Flatiron Station Gate C(Timepoint)(Selected stop)
- Via Varra Rd & Midway Blvd
- US 36 & McCaslin Station Gate E(Timepoint)
- US 36 & Table Mesa Station Gate E(Timepoint)
- 28th St & College Ave
- 28th St & Sundown La
- 28th St & Arapahoe Ave(Timepoint)
- Canyon Blvd & 28th St(Timepoint)
- Downtown Boulder Station (Ar)(Timepoint)
Plan your trip and pay
- RTD's page for route AB3 (live arrivals)(opens rtd-denver.com)
- RTD trip planner(opens rtd-denver.com)
- Fares and passes(opens rtd-denver.com)
- Accessibility on RTD(opens rtd-denver.com)
- Service alerts(opens rtd-denver.com)
- Denver transit map
Source: RTD GTFS feed Sep26-37243-12-13-20261009-141920. Live arrivals come from RTD's real-time feed on the transit map.