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BostonMBTA

MBTA 21 bus

Ashmont Station - Forest Hills Station

54 % on time

MBTA 21 bus Stop List and Next Departures

The MBTA 21 - Ashmont Station - Forest Hills Station bus serves 21 bus stops in the Boston area departing from Forest Hills / Lower Busway and ending at Ashmont / Busway. Scroll down to see upcoming 21 bus times at each stop and the next scheduled 21 bus times will be displayed. The full 21 bus schedule as well as real-time departures can be found in the Transit app.

MBTA Ashmont Station - Forest Hills Station map

MBTA 21 bus route map

The MBTA 21 - Ashmont Station - Forest Hills Station bus route map is shown above. The route map shows you an overview of all the stops served by the MBTA 21 bus to help you plan your trip on MBTA. Opening the app will allow you to see more detailed information about the route on a map including stop specific alerts, such as stops that have been closed or moved. You can also see the location of vehicles in real-time on the route map so you know when the 21 bus is approaching your stop.

See the detailed route map

MBTA 21 bus Service Alerts

Open the Transit app to see more information about any active disruptions that may impact the 21 bus schedule, such as detours, moved stops, trip cancellations, major delays, or other service changes to the bus route. The Transit app also allows you to subscribe to receive notifications for any service alert issued by MBTA so that you can plan your trip around any active or future disruptions.

See all alerts

MBTA 21 bus Service Frequency

The next 21 bus leaves Forest Hills / Lower Busway at 11:37 AM, and arrives at Ashmont / Busway at 11:52 AM. You can see the frequency of upcoming trips and the exact departure times by opening the Transit app.

See all departures

MBTA 21 bus On-Time Performance

54 % on time

54% of riders report that the MBTA 21 bus arrived on time on their previous trip. In the past 30 days, 65 riders reported on the on-time performance of the 21 bus. Compared to other MBTA lines, the 21 bus is ranked 140 out of 181 MBTA lines. These on-time performance stats are user reported and may differ from official MBTA metrics. See more details about on time, late or early departure reports for the 21 by opening the Transit app.

See all on-time performance details

MBTA 21 bus FAQ

  • What time does the next MBTA 21 bus depart from Forest Hills / Lower Busway?

    The next 21 bus leaves Forest Hills / Lower Busway at 11:37 AM, and arrives at Ashmont / Busway at 11:52 AM. The total trip time for the next MBTA 21 bus is 15 min.

  • Is the MBTA 21 bus running on time, early or late?

    You can track your bus on a map, monitor real-time updates, and see adjustments to the MBTA 21 schedule by downloading the Transit app.

  • When does the next MBTA 21 bus arrive?

    You can see the next MBTA 21 bus times in the app as well as future departure times for the 21 bus.

  • How many bus stops are there for the MBTA 21 bus?

    There are 21 stops on the MBTA 21 bus.

  • Is the MBTA 21 bus usually crowded?

    You can find real-time information on MBTA 21 bus crowding levels in the Transit app (available in select cities or on select trips). You can also see predictions on how crowded the bus will be when it gets to your bus stop.

  • Is the MBTA 21 bus currently running?

    Find out the current status for the MBTA 21 bus in the Transit app.

  • What is the closest MBTA 21 bus stop to me?

    Open the Transit app to see your location on a map and find the closest 21 bus stop to where you are.

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