Boston Cruise Port Rental Car Guide

We found no rental desk at Flynn Cruiseport, and only Enterprise South Boston’s page mentions the port. Its wording is careful — the branch “may offer pick up or return service to or from port”, and it’s closed on Sundays, so call before you count on the ride.

Sixt sits inside the Westin at 425 Summer Street, left of the front desk. Outside office hours its page says to take the garage elevator to the lobby and leave the key at the branch.

Harbor Garage at 270 Atlantic Avenue puts Enterprise, Avis and Budget under one roof near the Aquarium, about 1.6 miles out by our estimate. Enterprise’s after-hours returns go to the 7th floor.

Avis and Budget also share desks at the Back Bay Station garage (100 Clarendon St) and Government Center (1 Center Plaza); Enterprise has desks at the Revere Hotel (200 Stuart St) and in Roxbury and Brookline; Hertz has a Westin Copley desk open 8 to 3:30.

Roxbury’s Enterprise, at 17 Melnea Cass Boulevard, opens 9 to 1 on weekends but takes no after-hours returns — a branch to collect from, not to drop at late.

Try 3 PM on a Sunday and most of downtown has gone home. Sixt closes at 2 on weekends, Budget and Avis Beach Street at 4, and Enterprise South Boston never opens on Sunday.

Avis at 2 Seaport Lane keeps 7 to 7 every day — the steadiest hours near the ship. Hertz at Park Plaza holds on until 5 on Sunday.

Logan’s Avis and Hertz counters are listed as open 24 hours. For a late return the airport is the safe answer, not the fast one.

Budget and Avis both say a key drop leaves you responsible until the contract closes the next business day — so a Sunday drop can mean a Monday check-in.

A rental written in Boston carries a flat $12 per contract on top of 6.25% sales tax: $10 for Boston, which includes Logan, and $2 for the state on rentals over 12 hours. On a one-day rental that’s a big share of the bill — on a week it’s a rounding error.

Logan adds a $6-a-day facility charge, from a consultant’s survey effective Feb 1, 2026, with no cap, so a two-week rental carries $84 of it. Budget’s Logan page mentions a concession fee without a percentage. We assume 11%, a common airport level, not a published one.

Rhode Island and New Hampshire tax rentals their own way. The airport page works those through for Providence and Manchester.

Over a week, the airport costs about $86 more on these assumptions. The trade is hours — Logan’s Avis and Hertz counters are open around the clock, and some Seaport desks shut at 2 or 4 on weekends.

Three days at an assumed $50 come to about $208 from Logan and $171 from a Seaport desk on our assumptions.

Flip the pick-up and only two lines move: the facility charge and the concession fee. The $12 in contract fees stays, since Logan sits inside Boston.

Add a day and the gap widens by the $6 charge plus 11% of the extra rate — small on a weekend, real on a fortnight.

The Ted Williams, Sumner and Callahan tunnels charge $1.50 with a Massachusetts E-ZPass, $1.75 with one from another state and $2.05 by plate; the Tobin Bridge is $1.25, or $1.55 by plate.

Logan to the Seaport runs through the Ted Williams Tunnel, so budget $1.75 on an out-of-state E-ZPass or $2.05 by plate, if it charges in your direction.

We couldn’t confirm which directions each tunnel charges, and no Mass Pike rate came back from the state’s calculator. That’s a gap in our sources, not a reason to assume a crossing is free.

A Massachusetts E-ZPass holder can add a rental’s plate for the trip; otherwise the company bills the tolls and its fee. The program fee is the part worth watching — at $4.95 or $6.95 a toll day, it costs more than the tunnel.

Hertz caps its PlatePass fee at $24.75 a rental, though the daily amount wasn’t shown on the page we read. The state’s toll calculator lists E-ZPass and pay-by-plate rates, and no cash rate.

Massport runs the cruiseport’s parking, and its pages blocked our tools. Everything in this section comes from other sources, so treat it as a lead, not a confirmed rate.

A parking site sells cruise parking at Massport Lot D-3, 492 Summer Street, with a free shuttle; a cruise-news article lists $189 a week there. Princess’s guide, and our own Boston pages, put the cruise lot at 93 Fargo Street instead — we couldn’t settle which address is current.

The same article lists a C1 lot at the terminal from $25 a day, $175 a week. It also puts the Marine Park Garage at 12 Drydock Avenue at $20 to $30 a day, varying by day, with a 6-foot-10 height limit.

Royal Caribbean’s page still mentions $16 a day at a city garage across the street, which looks out of date.

If you’re bringing your own car, our Boston parking page goes deeper on the lots.

Children under 8 ride in a child restraint unless they’re taller than 57 inches (Massachusetts General Laws chapter 90, section 7AA). The statute’s fine runs up to $25.

Renting the seat adds up fast. Avis prints a usual $14 a day with an $84 ceiling, Budget $14.50 and $87, and the other brands we read price it only at the counter.

A week at the cap costs more than many checked-bag fees, so packing your own seat is usually the cheaper option.

Sailing on a weekend? Pick a desk that’s open when you need it, then compare rates there — a lower rate is no use at a counter that’s closed.

Headline “from” prices for Boston didn’t match the listings under them when we looked. The airport page shows the gap, so read totals, not headlines.