The average bus between South Station and Union Square takes 39 min and the fastest bus takes 28 min. The bus runs at least 2 times per hour from South Station to Union Square. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.
Buses run every 30 minutes between South Station and Union Square. The earliest departure is at 5:15 AM in the morning, and the last departure from South Station is at 7:50 PM which arrives into Union Square at 8:22 PM. All services require a transfer at Devonshire St @ Milk St and take an average of 39 min. The schedules shown below are for the next available departures.

28 min • 1 change

34 min • 1 change

39 min • 1 change

35 min • 1 change
Want to know about travelling from South Station to Union Square? We have put together a list of the most frequently asked questions from our users such as: What is the cheapest mode of transport? What is the quickest option? How much do tickets usually cost? and many more.
No, there is no direct bus from South Station to Union Square. However, there are services departing from South Station station and arriving at Union Square station via Sullivan Square. The journey, including transfers, takes approximately 39 min.
South Station to Union Square bus services, operated by MBTA, depart from Devonshire St @ Milk St station.
South Station to Union Square bus services, operated by MBTA, arrive at Somerville Ave @ Union Sq station.
The distance between South Station and Union Square is 4.6 km. The road distance is 8 km.
You can take a vehicle from South Station to Union Square via Devonshire St @ Milk St, Sullivan Square, and Somerville Ave @ Union Sq in around 43 min.