AB3
Boulder / Denver Airport
Bus
Timetable valid Sep 27, 2026 to Jan 2, 2027, from RTD's published schedule.
Departures from 28th St & Sundown La
Next scheduled · today
No more scheduled departures today.
All saturday departures (4 trips)
- 9:50 AM
- 10:50 AM
- 7:22 PM
- 8:14 PM
This stop sits between RTD's timepoints, so these times are estimated from the timetable and may be a minute or two off.
Live arrivals on the mapOther routes at this stop
When it runs · Saturday
- First trip
- 9:50 AM
- Last trip
- 8:14 PM
| Time of day | How often |
|---|---|
| Early morning12:00 AM–6:00 AM | No service |
| Morning rush6:00 AM–9:00 AM | No service |
| Midday9:00 AM–3:00 PM | Every 286 min |
| Afternoon rush3:00 PM–7:00 PM | No service |
| Evening7:00 PM–10:00 PM | Every 52 min |
| Late night10:00 PM–3:00 AM | No service |
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)
- 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(Selected stop)
- 28th St & Arapahoe Ave(Timepoint)
- Canyon Blvd & 28th St(Timepoint)
- Downtown Boulder Station (Ar)(Timepoint)
Full timetable · Saturday · To Dtwn Boulder via 28th St
Times at RTD's timepoints. A dash means that trip does not stop there.
Show all 4 trips
| Denver Airport Station Gate 8 | US 36 & Flatiron Station Gate C | US 36 & McCaslin Station Gate E | US 36 & Table Mesa Station Gate E | 28th St & Arapahoe Ave | Canyon Blvd & 28th St | Downtown Boulder Station (Ar) |
|---|---|---|---|---|---|---|
| 8:50 AM | 9:23 AM | 9:30 AM | 9:44 AM | 9:51 AM | 9:57 AM | 10:02 AM |
| 9:50 AM | 10:23 AM | 10:30 AM | 10:44 AM | 10:51 AM | 10:57 AM | 11:02 AM |
| 6:20 PM | 6:53 PM | 7:01 PM | 7:16 PM | 7:23 PM | 7:28 PM | 7:32 PM |
| 7:20 PM | 7:53 PM | 8:01 PM | 8:08 PM | 8:15 PM | 8:20 PM | 8:24 PM |
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.