Connecting at Boston Logan: which terminals connect, customs and how much time you need

One hour is often enough at Boston Logan for a domestic connection on one ticket between Terminals B, C and E, because they're connected inside security and you skip a second TSA line. Terminal A is the exception: it isn't linked to the other terminals airside, so a connection to or from A means leaving security, walking or taking the free shuttle, and being screened again. Arrivals from abroad clear customs in Terminal E first. The airport doesn't publish a minimum connection time.

Is 1 hour enough at Boston Logan?

Logan doesn't set a minimum and tells passengers to check with their airline.

• Between B, C and E on one ticket: you stay airside and the airline moves your checked bags. One hour is usually workable if the first flight is on time.
• To or from Terminal A: you leave security, cross to the other terminal and go through TSA again. One hour is tight, especially at busy times.
• Arriving from another country: passport control, bag collection, customs, recheck and TSA all come before your next gate. One hour is rarely enough.

On one ticket, the airline sold you a connection that meets its own minimum and has to rebook you if you miss it. On separate tickets, nobody checks the timing, and you'll recheck bags yourself. Read is a 1-hour layover enough?

Are Boston Logan terminals connected?

Partly. Logan has four terminals, A, B, C and E (there's no D).

The airport's promise of no second screening between B, C and E applies when both flights are on the same reservation. Post-security areas close each night after the last departure, while the public areas stay open 24 hours.

Changing terminals outside security

• Free shuttle buses link all four terminals. The airport says they generally run every 5 to 6 minutes. Route 11 runs between all terminals from 9 a.m. to 10 p.m., and Route 88 serves every terminal 24 hours a day.
• Late at night, fewer routes run, so allow a few extra minutes for the bus or walk instead.
• Walking is possible on the pedestrian walkways between the terminals, before security.
• TSA screening again: liquids follow the 3-1-1 rule, so keep anything bigger in a checked bag.
• Check your terminal on your boarding pass before you land. Your airline may also have other connection options from Terminal A.

Arriving from another country (international to domestic)

Most international arrivals at Logan come through Terminal E for US Customs and Border Protection. The steps:

1. Passport control with CBP in Terminal E.
2. Collect your checked bags, even if they're tagged to your final destination. CBP says a bag you don't pick up won't reach it.
3. Customs, then recheck your bags with your airline.
4. TSA security again. Duty-free liquids over 3.4 oz can go through in a sealed, tamper-evident bag with the receipt.

Once you're through security in Terminal E, you can walk airside to Terminals C and B. If your next flight leaves from Terminal A, take the walkway or the shuttle to A after rechecking your bags and use A's checkpoint. Flights precleared abroad arrive as domestic flights, with no customs at Logan. Read international to domestic connections.

Domestic to international

Terminal E is the main international terminal, but the airport notes international flights can leave from any of the four terminals, so check your boarding pass. From B or C you walk to E inside security. From Terminal A you leave security, cross by walkway or shuttle and go through TSA at your departure terminal.

What's changing in 2026 to 2028

• A post-security connector between Terminals A and B is under construction, between gates A11 and B1. When it opens, you'll be able to walk between all terminals without leaving security. The airport's 2024 contract documents set a goal of finishing it by spring 2028.
• Terminal E gained four gates in 2023, for 16 in total. Work continues on a larger international baggage claim hall with two new belts and upgraded customs screening.
• Runway 9-27 has been closed, with very limited availability, for 75 days from August 31, 2026, and the airport expects to finish before Thanksgiving. Until then, expect more delays when the weather or air traffic limits the other runways.
• New overhead signs are coming across the airport after a passenger survey in early 2026.

Customs wait times

From October 2025 to September 2026, passengers arriving from abroad at BOS waited 18 minutes on average to clear passport control, according to CBP: 15 minutes for US citizens and 24 minutes for visitors. 1.6% waited more than an hour. The slowest arrival hour was 10 a.m.–11 a.m., averaging 22 minutes. These times don't include collecting bags or walking to your next gate. See US customs wait times by airport.

On-time record

From September 2025 to August 2026, 70.2% of scheduled arrivals at Boston (BOS) reached the gate on time, rank 26 of the 30 busiest US airports. 73.5% of departures left on time and 3.0% of departures were canceled. The largest share of delay minutes came from late-arriving aircraft. See the full US airport on-time ranking.

Follow the first flight

Add both flights to FlyingOver before you travel. You'll follow the first flight offline and see its estimated arrival, and with Premium, connection guidance shows whether your layover looks comfortable, whether you need to keep moving or whether you should go directly to the gate.