BOS spans five terminals (A, B, C, E) with walking connections of 8–22 minutes between them. Connections within the B–C corridor are fastest (8 min, no security recheck). Longer connections like E to A require 22 minutes walking plus security and immigration rechecks; plan 90–100 minutes minimum for these routes. No train or bus connections available between terminals.

["Multi-terminal layout requires walking distances up to 22 minutes with potential security rechecks and immigration processing on most inter-terminal moves","E to A, E to B, and E to C connections all require full security recheck and immigration, adding significant time beyond walking","No automated transit between terminals means all connections are walk-only, with fatigue risk on longer layovers"]

The Delta Sky Club in Terminal E (near gate E13) and American Airlines Admirals Club in Terminal B (near gate B30) are your top choices, both offering showers and rated 5 stars. Access requires airline status or eligible credit cards. The Chase Sapphire Lounge in Terminal B also features showers and private rooms (rated 4 stars) via Lounge Key eligibility through select credit cards.