Terminals · BOS
Allegiant departs from Terminal E at Boston Logan International Airport (BOS). We verified this against the airport's own sources on June 27, 2026 — airlines do move terminals, so we date every check.

Allegiant departs from Terminal E at Boston Logan International Airport (BOS). Verified June 27, 2026.
Allegiant checks in and drops bags on the departures level of Terminal E at BOS. Bag drop typically closes 45 minutes before departure, so plan to be there in time.
Not that we've found. We confirmed Allegiant departs from Terminal E at BOS as of June 27, 2026. Airlines do shuffle terminals, so we re-check and date every change.
Domestic departures from Terminal E.
Not sure which building that is? See all BOS terminals with the airport map and how to get between them. Then let your Leave-By Time count backward from your flight — today's BOS security wait, your drive, and the walk to your gate — so you leave with room to breathe.