The 70-mile drive from Boston to Cape Cod is deceptively simple — until summer Friday traffic, ferry timing, and the Sagamore Bridge rotary turn it into a 4-hour crawl. Here's the playbook.

The route

Boston to the Cape is a straight shot down I-93 south to Route 3, crossing either the Sagamore Bridge (upper Cape) or Bourne Bridge (mid/lower Cape and Falmouth). Total distance is about 70 miles to Hyannis, 115 miles to Provincetown.

Traffic: the timing that matters

In summer, Route 3 southbound from Thursday evening through Friday evening can be a standstill. The Sagamore Bridge bottleneck is the single worst traffic point in Massachusetts. Locals know the math:

  • Best times to drive to the Cape (summer): Before 9 AM or after 9 PM on Fridays, before 2 PM or after 8 PM on Saturdays
  • Worst times: Friday 3-7 PM (downtown Boston to the bridges can take 3+ hours)
  • Return traffic: Sunday 3-8 PM northbound is the weekend's worst

Popular Cape destinations

  • Hyannis — gateway for Nantucket and Martha's Vineyard ferries, 75 minutes from Boston
  • Falmouth / Woods Hole — ferry to Martha's Vineyard, 80 minutes
  • Chatham — the elbow of the Cape, 90 minutes
  • Provincetown — the tip, 2 hours from Boston
  • Sandwich / Bourne — first stop on the Cape, 65 minutes

Ferry connections

If you're heading to Nantucket or Martha's Vineyard, your car service can drop you at the Hyannis or Woods Hole ferry terminal. We coordinate pickup to meet your ferry arrival on return. For same-day round-trip to the islands, we recommend booking hourly service or a pickup-and-return with a fixed return time.

Cape Cod to Logan Airport

A reverse trip — Cape to Logan — is a common request for second-home owners and visitors wrapping up vacations. Allow 2-2.5 hours from Hyannis, 3 hours from Provincetown during shoulder season; add 1-2 hours in peak summer traffic.

Winter on the Cape

Off-season Cape trips are smooth — traffic evaporates after Labor Day, and the drive is typically 65-75 minutes to Hyannis. Winter storms occasionally close the bridges, but this is rare.

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