BOS · Boston, Massachusetts
Reviewed June 28, 2026
Boston Logan (BOS) leave time depends on I-90, the Ted Williams Tunnel, Sumner Tunnel patterns, harbor crossings and terminal curb congestion, the correct terminal or concourse, parking or curbside access, checked bags, TSA PreCheck, airport transfers and whether your flight is domestic or international.
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Illustrative BOS example
7:30 AM domestic flight · Back Bay · parking
Leave around 4:50 AM
Boston Logan is busy enough that generic airport advice is not enough. The useful question is not only when to arrive, but when to leave from your actual starting point. For BOS, that means working backward from your flight time and adding the local details that can change the trip: I-90, the Ted Williams Tunnel, Sumner Tunnel patterns, harbor crossings and terminal curb congestion, terminal choice, parking or rideshare access, transit schedules, checked bags, TSA PreCheck and the larger buffer often needed for international departures.
Operational details can change, so verify your terminal and travel schedule before departure.
Each example is illustrative, not live traffic guidance. The assumptions are shown so you can see the calculation and replace them with your own details above.
Back Bay -> BOS
Assumptions
Work backward
Illustrative leave time: 4:50 AM
Cambridge -> BOS
Assumptions
Work backward
Illustrative leave time: 1:30 PM
South Station -> BOS
Assumptions
Work backward
Be at South Station ready to board by about 7:00 AM
Traffic and service conditions vary. Use the live calculator for your trip and check official transportation schedules before leaving.
Stable planning facts—such as terminal names and airport transfer options—belong in this guide. Traffic, security waits, airline terminals and service disruptions are volatile, so the calculator or official operator should supply the current answer.
Recheck your airline terminal, bag-drop deadline, airport transit schedule and transfer service on the day you travel.
Facts on this page were checked against airport, transit, security and traffic sources. Reviewed June 28, 2026.
Boston Logan (BOS) leave time depends on I-90, the Ted Williams Tunnel, Sumner Tunnel patterns, harbor crossings and terminal curb congestion, the correct terminal or concourse, parking or curbside access, checked bags, TSA PreCheck, airport transfers and whether your flight is domestic or international.
Use about 2 hours before a domestic flight and 3 hours before an international flight as a planning baseline. Add time for parking, rail or terminal transfers, and follow any earlier deadline supplied by your airline.
Yes. Enter your starting location and flight time to estimate the trip for your travel window. The result also includes airport-processing assumptions and the arrival method you select.
At BOS, plan around I-90, the Ted Williams Tunnel, Sumner Tunnel patterns, harbor crossings and terminal curb congestion, boston logan uses terminals a, b, c and e, with terminal e serving many international departures. Terminal shuttles, central parking and rideshare locations can add time even after a short downtown drive. MBTA Blue Line, Silver Line and water transportation can work well, but each requires station, shuttle or dock movement.
